Physics - KhanAcademy

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Select section General

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General

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Select section 1. Physical World

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1. Physical World
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  What is Physics?
  
  Select activity Introduction to physics
  
  Introduction to physics Lesson
  
  Students must
  
  Mark as done
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  Scope and Excitement of Physics
  
  Select activity Models and Approximations in Physics
  
  Models and Approximations in Physics Lesson
  
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  Fundamental Forces in Nature
  
  Select activity Four fundamental forces
  
  Four fundamental forces Lesson
  
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Select section 2. Units & Measurement

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2. Units & Measurement
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  Measurement of Length
  
  Select activity Scale of the large
  
  
  
  Scale of the large Lesson
  
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  Select activity Parallax in observing stars
  
  
  
  Parallax in observing stars Lesson
  
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  Select activity Stellar distance using parallax
  
  
  
  Stellar distance using parallax Lesson
  
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  Select activity Stellar parallax clarification
  
  
  
  Stellar parallax clarification Lesson
  
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  Select activity Scale of the small
  
  
  
  Scale of the small Lesson
  
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  Significant figures
  
  Select activity Significant figures
  
  
  
  Significant figures Lesson
  
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  Select activity More on significant figures
  
  
  
  More on significant figures Lesson
  
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  Select activity Multiplying and dividing with significant figures
  
  
  
  Multiplying and dividing with significant figures Lesson
  
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  Select activity Addition and subtraction with significant figures
  
  
  
  Addition and subtraction with significant figures Lesson
  
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  Select activity Scale of the large
  
  
  
  Scale of the large Lesson
  
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  Select activity Why do we need significant figures?
  
  
  
  Why do we need significant figures? Lesson
  
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  Select activity Rules for determining significant figures
  
  
  
  Rules for determining significant figures Lesson
  
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  Select activity Scientific notation examples
  
  
  
  Scientific notation examples Lesson
  
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  Select activity Express a small number in scientific notation (example)
  
  
  
  Express a small number in scientific notation (example) Lesson
  
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  Dimensions of physical quantities
  
  Select activity Fundamental and Derived quantities
  
  Fundamental and Derived quantities Lesson
  
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  Dimensional analysis and its applications
  
  Select activity 1st application of Dimensional analysis
  
  1st application of Dimensional analysis Lesson
  
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  Select activity Worked example: Dimensional analysis
  
  Worked example: Dimensional analysis Lesson
  
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Select section 3. Motion in a Straight Line

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3. Motion in a Straight Line
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  Position, Path length and Displacement
  
  Select activity Distance and displacement introduction
  
  
  
  Distance and displacement introduction Lesson
  
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  Select activity Distance and displacement in one dimension
  
  
  
  Distance and displacement in one dimension Lesson
  
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  Select activity Position-time graphs
  
  
  
  Position-time graphs Lesson
  
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  Select activity Worked example: distance and displacement from position-time graphs
  
  
  
  Worked example: distance and displacement from position-time graphs Lesson
  
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  Select activity Worked example: Properties of Distance and Displacement
  
  
  
  Worked example: Properties of Distance and Displacement Lesson
  
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  Select activity Position
  
  
  
  Position Lesson
  
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  Average velocity and Average Speed
  
  Select activity Calculating average velocity or speed
  
  Calculating average velocity or speed Lesson
  
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  Select activity Average velocity and speed worked example
  
  Average velocity and speed worked example Lesson
  
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  Instantaneous Velocity and Speed
  
  Select activity x-t graph when velocity is not constant
  
  
  
  x-t graph when velocity is not constant Lesson
  
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  Select activity Instantaneous speed and velocity
  
  
  
  Instantaneous speed and velocity Lesson
  
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  Select activity Position vs. time graphs
  
  
  
  Position vs. time graphs Lesson
  
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  Select activity Slope of the tangent gives us instantaneous velocity
  
  
  
  Slope of the tangent gives us instantaneous velocity Lesson
  
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  Select activity Worked example: On velocity and speed
  
  
  
  Worked example: On velocity and speed Lesson
  
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  Acceleration
  
  Select activity Why distance is area under velocity-time line
  
  
  
  Why distance is area under velocity-time line Lesson
  
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  Select activity Acceleration
  
  
  
  Acceleration Lesson
  
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  Select activity Airbus A380 take-off time
  
  
  
  Airbus A380 take-off time Lesson
  
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  Select activity Acceleration vs. time graphs
  
  
  
  Acceleration vs. time graphs Lesson
  
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  Select activity Acceleration of aircraft carrier take-off
  
  
  
  Acceleration of aircraft carrier take-off Lesson
  
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  Select activity Airbus A380 take-off distance
  
  
  
  Airbus A380 take-off distance Lesson
  
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  Select activity Deriving displacement as a function of time, acceleration, and initial velocity
  
  
  
  Deriving displacement as a function of time, acceleration, and initial velocity Lesson
  
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  Select activity Area under a curved graph
  
  
  
  Area under a curved graph Lesson
  
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  Select activity Plotting projectile displacement, acceleration, and velocity
  
  
  
  Plotting projectile displacement, acceleration, and velocity Lesson
  
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  Select activity Projectile height given time
  
  
  
  Projectile height given time Lesson
  
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  Select activity Worked example: Effects of acceleration
  
  
  
  Worked example: Effects of acceleration Lesson
  
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  Select activity Worked example: Area below v-t graph
  
  
  
  Worked example: Area below v-t graph Lesson
  
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  Select activity Worked ex: Direction of acceleration and velocity
  
  
  
  Worked ex: Direction of acceleration and velocity Lesson
  
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  Kinematic equations for uniformly accelerated motion
  
  Select activity Choosing kinematic equations
  
  
  
  Choosing kinematic equations Lesson
  
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  Select activity Impact velocity from given height
  
  
  
  Impact velocity from given height Lesson
  
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  Select activity Calculating car's velocity using skid marks
  
  
  
  Calculating car's velocity using skid marks Lesson
  
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  Select activity Sign of gravity in free fall
  
  
  
  Sign of gravity in free fall Lesson
  
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  Select activity Worked example: Free fall, object thrown up from a building
  
  
  
  Worked example: Free fall, object thrown up from a building Lesson
  
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  Select activity Worked example: motion problems (with definite integrals)
  
  
  
  Worked example: motion problems (with definite integrals) Lesson
  
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  Relative velocity
  
  Select activity Intro to relative velocity
  
  Intro to relative velocity Lesson
  
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  Select activity Calculating relative velocity
  
  Calculating relative velocity Lesson
  
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Select section 4. Motion in a Plane

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4. Motion in a Plane
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  Scalars and Vectors
  
  Select activity Intro to vectors & scalars
  
  
  
  Intro to vectors & scalars Lesson
  
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  Select activity Visualizing vectors in 2 dimensions
  
  
  
  Visualizing vectors in 2 dimensions Lesson
  
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  Select activity Worked ex: Vector magnitude and direction
  
  
  
  Worked ex: Vector magnitude and direction Lesson
  
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  Multiplication of vectors by real numbers
  
  Select activity Worked example: Scalar multiplication of vectors
  
  Worked example: Scalar multiplication of vectors Lesson
  
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  Addition and Subtraction of Vectors – graphical method
  
  Select activity Addition of Vectors
  
  Addition of Vectors Lesson
  
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  Resolution of Vectors
  
  Select activity Unit vectors and engineering notation
  
  
  
  Unit vectors and engineering notation Lesson
  
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  Select activity Unit vector notation
  
  
  
  Unit vector notation Lesson
  
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  Select activity Unit vector notation (part 2)
  
  
  
  Unit vector notation (part 2) Lesson
  
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  Projectile Motion
  
  Select activity Horizontally launched projectile
  
  
  
  Horizontally launched projectile Lesson
  
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  Select activity Projectile at an angle
  
  
  
  Projectile at an angle Lesson
  
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  Select activity Total displacement for projectile
  
  
  
  Total displacement for projectile Lesson
  
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  Select activity Total final velocity for projectile
  
  
  
  Total final velocity for projectile Lesson
  
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  Select activity Correction to total final velocity for projectile
  
  
  
  Correction to total final velocity for projectile Lesson
  
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  Select activity Projectile on an incline
  
  
  
  Projectile on an incline Lesson
  
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  Motion in a plane
  
  Select activity Race cars with constant speed around curve
  
  Race cars with constant speed around curve Lesson
  
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  Motion in a Plane with Constant Acceleration
  
  Select activity Intro to motion with constant acceleration
  
  Intro to motion with constant acceleration Lesson
  
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  Select activity Average velocity for constant acceleration
  
  Average velocity for constant acceleration Lesson
  
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  Relative velocity in two dimensions
  
  Select activity Relative velocity in 2D
  
  Relative velocity in 2D Lesson
  
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  Uniform circular motion
  
  Select activity Angular velocity and speed | Uniform circular motion and gravitation
  
  
  
  Angular velocity and speed | Uniform circular motion and gravitation Lesson
  
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  Select activity Visual understanding of centripetal acceleration formula
  
  
  
  Visual understanding of centripetal acceleration formula Lesson
  
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  Select activity Distance or arc length from angular displacement
  
  
  
  Distance or arc length from angular displacement Lesson
  
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  Select activity Deriving formula for centripetal acceleration from angular velocity
  
  
  
  Deriving formula for centripetal acceleration from angular velocity Lesson
  
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  Select activity Calculus proof of centripetal acceleration formula
  
  
  
  Calculus proof of centripetal acceleration formula Lesson
  
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  Select activity How to solve a projectile motion problem?
  
  
  
  How to solve a projectile motion problem? Lesson
  
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  Select activity Radius comparison from velocity and angular velocity: Worked example
  
  
  
  Radius comparison from velocity and angular velocity: Worked example Lesson
  
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  Select activity Linear velocity comparison from radius and angular velocity: Worked example
  
  
  
  Linear velocity comparison from radius and angular velocity: Worked example Lesson
  
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  Select activity Change in period and frequency from change in angular velocity: Worked examples
  
  
  
  Change in period and frequency from change in angular velocity: Worked examples Lesson
  
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Select section 5. Laws of Motion

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5. Laws of Motion
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  Newton’s first law of Motion
  
  Select activity Newton's first law of motion concepts
  
  Newton's first law of motion concepts Lesson
  
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  Select activity Newton's first law of motion
  
  Newton's first law of motion Lesson
  
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  Newton’s Second Law of Motion
  
  Select activity Newton's second law of motion
  
  
  
  Newton's second law of motion Lesson
  
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  Select activity Introduction to momentum
  
  
  
  Introduction to momentum Lesson
  
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  Select activity Impulse and momentum dodgeball example
  
  
  
  Impulse and momentum dodgeball example Lesson
  
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  Select activity Bouncing fruit collision example
  
  
  
  Bouncing fruit collision example Lesson
  
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  Select activity Momentum: Ice skater throws a ball
  
  
  
  Momentum: Ice skater throws a ball Lesson
  
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  Select activity 2-dimensional momentum problem
  
  
  
  2-dimensional momentum problem Lesson
  
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  Select activity 2-dimensional momentum problem (part 2)
  
  
  
  2-dimensional momentum problem (part 2) Lesson
  
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  Select activity Change in momentum from force-time graphs
  
  
  
  Change in momentum from force-time graphs Lesson
  
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  Select activity Measuring the speed of a bullet using a block and a string
  
  
  
  Measuring the speed of a bullet using a block and a string Lesson
  
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  Newton’s Third Law of Motion
  
  Select activity Newton's third law of motion
  
  
  
  Newton's third law of motion Lesson
  
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  Select activity More on Newton's third law
  
  
  
  More on Newton's third law Lesson
  
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  Select activity Example: Analysing motion using Newton's laws
  
  
  
  Example: Analysing motion using Newton's laws Lesson
  
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  Conservation of momentum
  
  Select activity Momentum conservation - Solved example
  
  Momentum conservation - Solved example Lesson
  
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  Select activity Momentum conservation derivation (2 bodies colliding)
  
  Momentum conservation derivation (2 bodies colliding) Lesson
  
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  Common Forces in Mechanics
  
  Select activity Force of friction keeping the block stationary
  
  
  
  Force of friction keeping the block stationary Lesson
  
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  Select activity Correction to force of friction keeping the block stationary
  
  
  
  Correction to force of friction keeping the block stationary Lesson
  
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  Select activity Force of friction keeping velocity constant
  
  
  
  Force of friction keeping velocity constant Lesson
  
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  Select activity Intuition on static and kinetic friction comparisons
  
  
  
  Intuition on static and kinetic friction comparisons Lesson
  
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  Select activity Static and kinetic friction example
  
  
  
  Static and kinetic friction example Lesson
  
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  Select activity Worked example: Forces and Motion
  
  
  
  Worked example: Forces and Motion Lesson
  
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  Circular Motion
  
  Select activity Introduction to centripetal force
  
  
  
  Introduction to centripetal force Lesson
  
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  Select activity Identifying centripetal force for ball on string
  
  
  
  Identifying centripetal force for ball on string Lesson
  
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  Select activity Identifying centripetal force for cars and satellites
  
  
  
  Identifying centripetal force for cars and satellites Lesson
  
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  Select activity Centripetal force problem solving
  
  
  
  Centripetal force problem solving Lesson
  
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  Select activity Yo-yo in vertical circle example
  
  
  
  Yo-yo in vertical circle example Lesson
  
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  Select activity Bowling ball in vertical loop
  
  
  
  Bowling ball in vertical loop Lesson
  
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  Select activity Mass swinging in a horizontal circle
  
  
  
  Mass swinging in a horizontal circle Lesson
  
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  Select activity Is centripetal force a new type of force?
  
  
  
  Is centripetal force a new type of force? Lesson
  
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  Solving problems in Mechanics
  
  Select activity Types of forces and free body diagrams
  
  
  
  Types of forces and free body diagrams Lesson
  
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  Select activity Breaking down forces for free body diagrams
  
  
  
  Breaking down forces for free body diagrams Lesson
  
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  Select activity Free body diagram with angled forces: worked example
  
  
  
  Free body diagram with angled forces: worked example Lesson
  
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  Select activity Worked example: Tension in a rope
  
  
  
  Worked example: Tension in a rope Lesson
  
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Select section 6. Work, Energy and Power

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6. Work, Energy and Power
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  Introduction
  
  Select activity The dot product
  
  The dot product Lesson
  
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  Work
  
  Select activity Work as area under curve
  
  Work as area under curve Lesson
  
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  Select activity Work example problems
  
  Work example problems Lesson
  
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  The work-energy theorem for a variable force
  
  Select activity Work and the work-energy principle
  
  Work and the work-energy principle Lesson
  
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  Work done by a variable force
  
  Select activity Work/energy problem with friction
  
  Work/energy problem with friction Lesson
  
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  Kinetic energy
  
  Select activity Example: Calculating work and KE from graphs
  
  Example: Calculating work and KE from graphs Lesson
  
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  The Potential Energy of a spring
  
  Select activity Intro to springs and Hooke's law
  
  
  
  Intro to springs and Hooke's law Lesson
  
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  Select activity Potential energy stored in a spring
  
  
  
  Potential energy stored in a spring Lesson
  
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  Select activity Spring potential energy example (mistake in math)
  
  
  
  Spring potential energy example (mistake in math) Lesson
  
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  Select activity Conservative forces
  
  
  
  Conservative forces Lesson
  
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  The Conservation of mechanical energy
  
  Select activity Law of conservation of energy
  
  
  
  Law of conservation of energy Lesson
  
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  Select activity LOL diagrams
  
  
  
  LOL diagrams Lesson
  
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  Select activity Conservation of energy
  
  
  
  Conservation of energy Lesson
  
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  Select activity Work as the transfer of energy
  
  
  
  Work as the transfer of energy Lesson
  
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  Select activity Vertical springs and energy conservation
  
  
  
  Vertical springs and energy conservation Lesson
  
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  Select activity Worked example: Conservation of energy
  
  
  
  Worked example: Conservation of energy Lesson
  
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  Power
  
  Select activity Power
  
  Power Lesson
  
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  Collisions
  
  Select activity Elastic and inelastic collisions
  
  
  
  Elastic and inelastic collisions Lesson
  
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  Select activity Solving elastic collision problems the hard way
  
  
  
  Solving elastic collision problems the hard way Lesson
  
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  Select activity Deriving the shortcut to solve elastic collision problems
  
  
  
  Deriving the shortcut to solve elastic collision problems Lesson
  
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  Select activity How to use the shortcut for solving elastic collisions
  
  
  
  How to use the shortcut for solving elastic collisions Lesson
  
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  Select activity What if humans could jump like fleas?
  
  
  
  What if humans could jump like fleas? Lesson
  
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Select section 7. System of Particles and Rotational Motion

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7. System of Particles and Rotational Motion
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  Centre of Mass
  
  Select activity Center of mass
  
  Center of mass Lesson
  
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  Select activity Center of mass equation
  
  Center of mass equation Lesson
  
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  Vector product of Two Vectors
  
  Select activity Cross product 1
  
  
  
  Cross product 1 Lesson
  
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  Select activity Cross product 2
  
  
  
  Cross product 2 Lesson
  
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  Select activity Cross product and torque
  
  
  
  Cross product and torque Lesson
  
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  Angular velocity and its relation with linear velocity
  
  Select activity Relating angular and regular motion variables
  
  Relating angular and regular motion variables Lesson
  
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  Select activity Angular motion variables
  
  Angular motion variables Lesson
  
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  Torque and Angular Momentum
  
  Select activity Introduction to torque
  
  
  
  Introduction to torque Lesson
  
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  Select activity Moments
  
  
  
  Moments Lesson
  
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  Select activity Moments (part 2)
  
  
  
  Moments (part 2) Lesson
  
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  Select activity Conservation of angular momentum
  
  
  
  Conservation of angular momentum Lesson
  
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  Select activity Finding torque for angled forces
  
  
  
  Finding torque for angled forces Lesson
  
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  Select activity Constant angular momentum when no net torque
  
  
  
  Constant angular momentum when no net torque Lesson
  
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  Select activity Ball hits rod angular momentum example
  
  
  
  Ball hits rod angular momentum example Lesson
  
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  Select activity Worked example: Angular impulse
  
  
  
  Worked example: Angular impulse Lesson
  
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  Kinematics of rotational motion about a fixed axis
  
  Select activity Rotational kinematic formulas
  
  Rotational kinematic formulas Lesson
  
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  Select activity Worked example: Torque and angular acc.
  
  Worked example: Torque and angular acc. Lesson
  
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  Moment of Inertia
  
  Select activity Rotational kinetic energy
  
  
  
  Rotational kinetic energy Lesson
  
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  Select activity Rotational version of Newton's second law
  
  
  
  Rotational version of Newton's second law Lesson
  
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  Select activity More on moment of inertia
  
  
  
  More on moment of inertia Lesson
  
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  Angular momentum in case of rotations about a fixed axis
  
  Select activity Angular momentum
  
  
  
  Angular momentum Lesson
  
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  Select activity Angular momentum of an extended object
  
  
  
  Angular momentum of an extended object Lesson
  
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  Select activity Worked example: Conservation of angular momentum
  
  
  
  Worked example: Conservation of angular momentum Lesson
  
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  Rolling Motion
  
  Select activity Rolling without slipping problems
  
  Rolling without slipping problems Lesson
  
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Select section 8. Gravitation

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8. Gravitation
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  Kepler’s Laws
  
  Select activity Orbital motion
  
  Orbital motion Lesson
  
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  Universal Law of Gravitation
  
  Select activity Introduction to gravity
  
  Introduction to gravity Lesson
  
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  The Gravitational Constant
  
  Select activity Mass and weight clarification
  
  Mass and weight clarification Lesson
  
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  Acceleration due to gravity below and above the surface of Earth
  
  Select activity Acceleration due to gravity at the space station
  
  Acceleration due to gravity at the space station Lesson
  
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  Select activity Viewing g as the value of Earth's gravitational field near the surface
  
  Viewing g as the value of Earth's gravitational field near the surface Lesson
  
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  Energy of an orbiting satellite
  
  Select activity Space station speed in orbit
  
  
  
  Space station speed in orbit Lesson
  
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  Select activity Impact of mass on orbital speed
  
  
  
  Impact of mass on orbital speed Lesson
  
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  Select activity Gravity for astronauts in orbit
  
  
  
  Gravity for astronauts in orbit Lesson
  
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  Gravitational Potential Energy
  
  Select activity Gravitational potential energy at large distances
  
  Gravitational potential energy at large distances Lesson
  
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  Select activity Worked example: Gravitational Potential energy of a system | Gravitation
  
  Worked example: Gravitational Potential energy of a system | Gravitation Lesson
  
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  Escape Speed
  
  Select activity Would a brick or feather fall faster?
  
  Would a brick or feather fall faster? Lesson
  
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Select section 9. Mechanical Properties of Solids

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9. Mechanical Properties of Solids
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  Introduction
  
  Select activity Elastic and non elastic materials
  
  Elastic and non elastic materials Lesson
  
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  Stress and Strain
  
  Select activity Stress & strain
  
  
  
  Stress & strain Lesson
  
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  Select activity Intro to springs and Hooke's law
  
  
  
  Intro to springs and Hooke's law Lesson
  
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  Select activity Strain example problem
  
  
  
  Strain example problem Lesson
  
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  Select activity Femur bone example problem
  
  
  
  Femur bone example problem Lesson
  
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  Hooke’s law
  
  Select activity Stress vs strain curve
  
  Stress vs strain curve Lesson
  
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  Stress-strain curve
  
  Select activity Young's modulus of elasticity
  
  Young's modulus of elasticity Lesson
  
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  Elastic Moduli
  
  Select activity Shear stress and strain
  
  
  
  Shear stress and strain Lesson
  
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  Select activity Shear modulus
  
  
  
  Shear modulus Lesson
  
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  Select activity Bulk stress
  
  
  
  Bulk stress Lesson
  
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  Select activity Solved example: pressure needed to compress water
  
  
  
  Solved example: pressure needed to compress water Lesson
  
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  Select activity Solved example: percentage change in density
  
  
  
  Solved example: percentage change in density Lesson
  
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  Applications of elastic behaviour of Materials
  
  Select activity Why use I beams in construction?
  
  
  
  Why use I beams in construction? Lesson
  
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  Select activity How to strengthen concrete?
  
  
  
  How to strengthen concrete? Lesson
  
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  Select activity How tall can mountains get?
  
  
  
  How tall can mountains get? Lesson
  
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Select section 10. Mechanical Properties of Fluids

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10. Mechanical Properties of Fluids
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  Pressure
  
  Select activity Pressure and Pascal's principle (part 1)
  
  
  
  Pressure and Pascal's principle (part 1) Lesson
  
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  Select activity Pressure and Pascal's principle (part 2)
  
  
  
  Pressure and Pascal's principle (part 2) Lesson
  
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  Select activity Pressure at a depth in a fluid
  
  
  
  Pressure at a depth in a fluid Lesson
  
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  Select activity Finding height of fluid in a barometer
  
  
  
  Finding height of fluid in a barometer Lesson
  
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  Select activity Archimedes principle and buoyant force
  
  
  
  Archimedes principle and buoyant force Lesson
  
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  Select activity Buoyant force example problems
  
  
  
  Buoyant force example problems Lesson
  
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  Select activity Worked example: Pressure due to fluid
  
  
  
  Worked example: Pressure due to fluid Lesson
  
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  Select activity Worked example: Excess pressure in a drop
  
  
  
  Worked example: Excess pressure in a drop Lesson
  
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  Streamline flow
  
  Select activity Volume flow rate and equation of continuity
  
  Volume flow rate and equation of continuity Lesson
  
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  Select activity Worked example: Continuity equation
  
  Worked example: Continuity equation Lesson
  
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  Bernoulli’s principle
  
  Select activity Bernoulli's equation (part 1)
  
  
  
  Bernoulli's equation (part 1) Lesson
  
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  Select activity Bernoulli's equation (part 2)
  
  
  
  Bernoulli's equation (part 2) Lesson
  
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  Select activity Bernoulli's equation (part 3)
  
  
  
  Bernoulli's equation (part 3) Lesson
  
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  Select activity Bernoulli's equation (part 4)
  
  
  
  Bernoulli's equation (part 4) Lesson
  
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  Select activity Bernoulli's example problem
  
  
  
  Bernoulli's example problem Lesson
  
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  Select activity Venturi effect and Pitot tubes
  
  
  
  Venturi effect and Pitot tubes Lesson
  
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  Viscosity
  
  Select activity Viscosity and Poiseuille flow
  
  Viscosity and Poiseuille flow Lesson
  
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  Reynolds number
  
  Select activity Turbulence at high velocities and Reynold's number
  
  Turbulence at high velocities and Reynold's number Lesson
  
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  Surface Tension
  
  Select activity Surface Tension and Adhesion
  
  
  
  Surface Tension and Adhesion Lesson
  
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  Select activity Specific gravity
  
  
  
  Specific gravity Lesson
  
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  Select activity Capillary action and why we see a meniscus
  
  
  
  Capillary action and why we see a meniscus Lesson
  
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  Select activity Surface tension | States of matter and intermolecular forces
  
  
  
  Surface tension | States of matter and intermolecular forces Lesson
  
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  Select activity Worked example: Surface tension and energy
  
  
  
  Worked example: Surface tension and energy Lesson
  
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Select section 11. Thermal Properties of Matter

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11. Thermal Properties of Matter
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  Temperature and Heat
  
  Select activity Thermal energy, temperature, and heat
  
  Thermal energy, temperature, and heat Lesson
  
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  Ideal-Gas Equation and Absolute Temperature
  
  Select activity Thermodynamics part 2: Ideal gas law
  
  
  
  Thermodynamics part 2: Ideal gas law Lesson
  
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  Select activity Thermodynamics part 3: Kelvin scale and Ideal gas law example
  
  
  
  Thermodynamics part 3: Kelvin scale and Ideal gas law example Lesson
  
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  Select activity Absolute temperature and the kelvin scale
  
  
  
  Absolute temperature and the kelvin scale Lesson
  
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  Thermal Expansion
  
  Select activity Intro to thermal expansion
  
  
  
  Intro to thermal expansion Lesson
  
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  Select activity Linear expansion
  
  
  
  Linear expansion Lesson
  
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  Select activity Linear expansion numerical
  
  
  
  Linear expansion numerical Lesson
  
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  Select activity Thermal expansion of ring
  
  
  
  Thermal expansion of ring Lesson
  
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  Select activity Area expansion coefficient
  
  
  
  Area expansion coefficient Lesson
  
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  Select activity Volume expansion coefficient
  
  
  
  Volume expansion coefficient Lesson
  
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  Select activity Volume expansion numerical
  
  
  
  Volume expansion numerical Lesson
  
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  Select activity Thermal expansion in liquids
  
  
  
  Thermal expansion in liquids Lesson
  
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  Select activity Thermal expansion in gas
  
  
  
  Thermal expansion in gas Lesson
  
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  Select activity Anomalous expansion of water
  
  
  
  Anomalous expansion of water Lesson
  
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  Select activity Thermal stress
  
  
  
  Thermal stress Lesson
  
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  Heat transfer
  
  Select activity Thermal conduction, convection, and radiation
  
  
  
  Thermal conduction, convection, and radiation Lesson
  
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  Select activity Thermal conduction
  
  
  
  Thermal conduction Lesson
  
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  Select activity Thermal conductivity of metal and wood
  
  
  
  Thermal conductivity of metal and wood Lesson
  
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  Select activity Intuition behind formula for thermal conductivity
  
  
  
  Intuition behind formula for thermal conductivity Lesson
  
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  Select activity Example: Equivalent thermal conductivity
  
  
  
  Example: Equivalent thermal conductivity Lesson
  
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  Change of State
  
  Select activity Specific heat and latent leat of fusion and vaporization
  
  Specific heat and latent leat of fusion and vaporization Lesson
  
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  Specific Heat Capacity
  
  Select activity Thermodynamics part 4: Moles and the ideal gas law
  
  Thermodynamics part 4: Moles and the ideal gas law Lesson
  
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  Select activity Thermodynamics part 5: Molar ideal gas law problem
  
  Thermodynamics part 5: Molar ideal gas law problem Lesson
  
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  Newton’s Law of Cooling
  
  Select activity Newton's Law of Cooling
  
  Newton's Law of Cooling Lesson
  
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  Select activity Applying Newton's Law of Cooling to warm oatmeal
  
  Applying Newton's Law of Cooling to warm oatmeal Lesson
  
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Select section 12. Thermodynamics

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12. Thermodynamics
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  Heat, Internal Energy and Work
  
  Select activity More on internal energy
  
  
  
  More on internal energy Lesson
  
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  Select activity Work from expansion
  
  
  
  Work from expansion Lesson
  
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  Select activity PV-diagrams and expansion work
  
  
  
  PV-diagrams and expansion work Lesson
  
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  Select activity Worked example: Internal energy
  
  
  
  Worked example: Internal energy Lesson
  
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  Select activity Example: Sign of work, heat and internal energy
  
  
  
  Example: Sign of work, heat and internal energy Lesson
  
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  First Law of Thermodynamics
  
  Select activity First law of thermodynamics / internal energy
  
  
  
  First law of thermodynamics / internal energy Lesson
  
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  Select activity Worked example: First law of thermodynamics
  
  
  
  Worked example: First law of thermodynamics Lesson
  
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  Select activity Worked example: First law of thermo - Cyclic processes
  
  
  
  Worked example: First law of thermo - Cyclic processes Lesson
  
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  Specific Heat Capacity
  
  Select activity Heat capacity at constant volume and pressure
  
  
  
  Heat capacity at constant volume and pressure Lesson
  
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  Select activity Proof: U = (3/2)PV or U = (3/2)nRT
  
  
  
  Proof: U = (3/2)PV or U = (3/2)nRT Lesson
  
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  Select activity Worked example: Work from PV diagram
  
  
  
  Worked example: Work from PV diagram Lesson
  
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  Thermodynamic State Variables and Equation of State
  
  Select activity Macrostates and microstates
  
  Macrostates and microstates Lesson
  
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  Thermodynamic Processes
  
  Select activity Quasistatic and reversible processes
  
  Quasistatic and reversible processes Lesson
  
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  Select activity Work done by isothermic process
  
  Work done by isothermic process Lesson
  
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  Carnot Engine
  
  Select activity Carnot cycle and Carnot engine
  
  
  
  Carnot cycle and Carnot engine Lesson
  
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  Select activity Proof: Volume ratios in a carnot cycle
  
  
  
  Proof: Volume ratios in a carnot cycle Lesson
  
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  Select activity Efficiency of a Carnot engine
  
  
  
  Efficiency of a Carnot engine Lesson
  
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  Select activity Carnot efficiency 2: Reversing the cycle
  
  
  
  Carnot efficiency 2: Reversing the cycle Lesson
  
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  Select activity Carnot efficiency 3: Proving that it is the most efficient
  
  
  
  Carnot efficiency 3: Proving that it is the most efficient Lesson
  
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  Select activity Worked example: Carnot engine
  
  
  
  Worked example: Carnot engine Lesson
  
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Select section 13. Kinetic Theory

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13. Kinetic Theory
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  Behaviour of Gases
  
  Select activity Boyle's law
  
  
  
  Boyle's law Lesson
  
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  Select activity Charles's law
  
  
  
  Charles's law Lesson
  
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  Select activity Avogadro's law
  
  
  
  Avogadro's law Lesson
  
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  Select activity Ideal gas equation: PV = nRT
  
  
  
  Ideal gas equation: PV = nRT Lesson
  
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  Select activity Introduction to partial pressure
  
  
  
  Introduction to partial pressure Lesson
  
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  Select activity Partial pressure example
  
  
  
  Partial pressure example Lesson
  
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  Select activity Ideal gas equation example 2
  
  
  
  Ideal gas equation example 2 Lesson
  
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  Select activity Ideal gas equation example 4
  
  
  
  Ideal gas equation example 4 Lesson
  
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  Kinetic Theory of an Ideal Gas
  
  Select activity Kinetic molecular theory of gases
  
  
  
  Kinetic molecular theory of gases Lesson
  
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  Select activity The Maxwell–Boltzmann distribution
  
  
  
  The Maxwell–Boltzmann distribution Lesson
  
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  Select activity Worked example:RMS speed and average KE of gas molecules
  
  
  
  Worked example:RMS speed and average KE of gas molecules Lesson
  
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  Select activity Boltzmann's constant
  
  
  
  Boltzmann's constant Lesson
  
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  Specific Heat Capacity
  
  Select activity Heat capacity at constant volume and pressure
  
  Heat capacity at constant volume and pressure Lesson
  
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  Mean Free Path
  
  Select activity Derivation of gas constants using molar volume and STP
  
  Derivation of gas constants using molar volume and STP Lesson
  
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Select section 14 (a). Oscillations

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14 (a). Oscillations
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  Periodic and Oscilatory Motions
  
  Select activity Definition of Amplitude and Period
  
  Definition of Amplitude and Period Lesson
  
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  Select activity Worked example: Find frequency & period from displacement-time graph
  
  Worked example: Find frequency & period from displacement-time graph Lesson
  
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  Simple Harmonic Motion
  
  Select activity Introduction to harmonic motion
  
  
  
  Introduction to harmonic motion Lesson
  
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  Select activity Harmonic motion part 2 (calculus)
  
  
  
  Harmonic motion part 2 (calculus) Lesson
  
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  Select activity Harmonic motion part 3 (no calculus)
  
  
  
  Harmonic motion part 3 (no calculus) Lesson
  
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  Select activity Phase constant
  
  
  
  Phase constant Lesson
  
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  Select activity Worked example: Find velocity from displacement time graph
  
  
  
  Worked example: Find velocity from displacement time graph Lesson
  
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  Simple Harmonic Motion and Uniform Circular Motion
  
  Select activity Equation for simple harmonic oscillators
  
  Equation for simple harmonic oscillators Lesson
  
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  Force Law for Simple Harmonic Motion
  
  Select activity Period dependence for mass on spring
  
  
  
  Period dependence for mass on spring Lesson
  
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  Select activity Intuition about simple harmonic oscillators
  
  
  
  Intuition about simple harmonic oscillators Lesson
  
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  Select activity Example: Analysing graphs of spring-mass system
  
  
  
  Example: Analysing graphs of spring-mass system Lesson
  
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  Energy in Simple Harmonic Motion
  
  Select activity Energy graphs for simple harmonic motion
  
  Energy graphs for simple harmonic motion Lesson
  
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  Select activity Worked example: Energy in a Simple Harmonic Motion
  
  Worked example: Energy in a Simple Harmonic Motion Lesson
  
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  The Simple Pendulum
  
  Select activity Pendulumsand mechanical waves
  
  Pendulumsand mechanical waves Lesson
  
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Select section 14 (b). Waves

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14 (b). Waves
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  Transverse and longitudinal waves
  
  Select activity Introduction to waves
  
  Introduction to waves Lesson
  
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  Select activity Production of sound
  
  Production of sound Lesson
  
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  Displacement relation in a progressive wave
  
  Select activity Amplitude, period, frequency and wavelength of periodic waves
  
  Amplitude, period, frequency and wavelength of periodic waves Lesson
  
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  Select activity The equation of a wave
  
  The equation of a wave Lesson
  
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  The principle of superposition of waves
  
  Select activity Wave interference
  
  
  
  Wave interference Lesson
  
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  Select activity Constructive and Destructive interference
  
  
  
  Constructive and Destructive interference Lesson
  
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  Select activity Sound Properties (Amplitude, Period, Frequency, Wavelength)
  
  
  
  Sound Properties (Amplitude, Period, Frequency, Wavelength) Lesson
  
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  Select activity Example: Frequency and amplitude from graphs
  
  
  
  Example: Frequency and amplitude from graphs Lesson
  
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  Reflection of waves
  
  Select activity Standing waves on strings
  
  
  
  Standing waves on strings Lesson
  
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  Select activity Standing waves in open tubes
  
  
  
  Standing waves in open tubes Lesson
  
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  Select activity Standing waves in closed tubes
  
  
  
  Standing waves in closed tubes Lesson
  
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  The speed of a travelling wave
  
  Select activity Speed of Sound
  
  Speed of Sound Lesson
  
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  Select activity Relative speed of sound in solids, liquids, and gases
  
  Relative speed of sound in solids, liquids, and gases Lesson
  
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  Beats
  
  Select activity Beat frequency
  
  Beat frequency Lesson
  
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  Select activity Derivation of beat frequency formula
  
  Derivation of beat frequency formula Lesson
  
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  Doppler effect
  
  Select activity Introduction to the doppler effect
  
  
  
  Introduction to the doppler effect Lesson
  
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  Select activity Doppler effect formula for observed frequency
  
  
  
  Doppler effect formula for observed frequency Lesson
  
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  Select activity Doppler effect formula when source is moving away
  
  
  
  Doppler effect formula when source is moving away Lesson
  
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  Select activity When the source and the wave move at the same velocity
  
  
  
  When the source and the wave move at the same velocity Lesson
  
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  Select activity Doppler effect for a moving observer
  
  
  
  Doppler effect for a moving observer Lesson
  
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  Select activity Doppler effect: reflection off a moving object
  
  
  
  Doppler effect: reflection off a moving object Lesson
  
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  Select activity Ultrasound medical imaging
  
  
  
  Ultrasound medical imaging Lesson
  
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Select section 15. Ray Optics and Optical Instruments

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15. Ray Optics and Optical Instruments
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  Reflection of Light by Spherical Mirrors
  
  Select activity Why do we use sign convention twice?
  
  
  
  Why do we use sign convention twice? Lesson
  
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  Select activity Cartesian sign conventions mirrors
  
  
  
  Cartesian sign conventions mirrors Lesson
  
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  Select activity Concave mirrors
  
  
  
  Concave mirrors Lesson
  
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  Select activity Convex mirror & applications
  
  
  
  Convex mirror & applications Lesson
  
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  Select activity Spherical & parabolic mirrors
  
  
  
  Spherical & parabolic mirrors Lesson
  
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  Select activity Spherical mirrors, radius of curvature & focal length
  
  
  
  Spherical mirrors, radius of curvature & focal length Lesson
  
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  Select activity Convex & concave mirror ray diagrams
  
  
  
  Convex & concave mirror ray diagrams Lesson
  
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  Select activity Mirror formula derivation
  
  
  
  Mirror formula derivation Lesson
  
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  Select activity Solved example: Mirror formula
  
  
  
  Solved example: Mirror formula Lesson
  
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  Select activity Worked example: Magnification in mirrors
  
  
  
  Worked example: Magnification in mirrors Lesson
  
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  Refraction
  
  Select activity Refraction and Snell's law
  
  
  
  Refraction and Snell's law Lesson
  
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  Select activity Snell's law example 1
  
  
  
  Snell's law example 1 Lesson
  
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  Select activity Snell's law example 2
  
  
  
  Snell's law example 2 Lesson
  
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  Select activity Refraction in water
  
  
  
  Refraction in water Lesson
  
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  Select activity Refraction through glass slab
  
  
  
  Refraction through glass slab Lesson
  
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  Select activity Advanced sunrise & delayed sunset
  
  
  
  Advanced sunrise & delayed sunset Lesson
  
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  Total Internal Reflection
  
  Select activity Total internal reflection
  
  
  
  Total internal reflection Lesson
  
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  Select activity Absolute & Relative refractive index
  
  
  
  Absolute & Relative refractive index Lesson
  
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  Select activity Relative & absolute R.I. connection
  
  
  
  Relative & absolute R.I. connection Lesson
  
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  Select activity Applications of Total Internal Reflection
  
  
  
  Applications of Total Internal Reflection Lesson
  
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  Select activity Worked example: Total internal reflection
  
  
  
  Worked example: Total internal reflection Lesson
  
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  Refraction at Spherical Surface and By lenses
  
  Select activity Convex lenses
  
  
  
  Convex lenses Lesson
  
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  Select activity Convex lens examples
  
  
  
  Convex lens examples Lesson
  
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  Select activity Concave lenses
  
  
  
  Concave lenses Lesson
  
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  Select activity Virtual Objectand Optical instruments
  
  
  
  Virtual Objectand Optical instruments Lesson
  
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  Select activity Power of lens
  
  
  
  Power of lens Lesson
  
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  Select activity Thin lenses in contact
  
  
  
  Thin lenses in contact Lesson
  
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  Select activity Thin lens formula derivation
  
  
  
  Thin lens formula derivation Lesson
  
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  Select activity Lens maker formula (short derivation)
  
  
  
  Lens maker formula (short derivation) Lesson
  
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  Select activity Solved example on lens formula
  
  
  
  Solved example on lens formula Lesson
  
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  Select activity Worked example: Image formed by multiple lenses
  
  
  
  Worked example: Image formed by multiple lenses Lesson
  
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  Select activity Curved surface refraction formula
  
  
  
  Curved surface refraction formula Lesson
  
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  Select activity Solved example: Curved surface refraction
  
  
  
  Solved example: Curved surface refraction Lesson
  
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  Select activity Solved example: Lens makers formula
  
  
  
  Solved example: Lens makers formula Lesson
  
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  Refraction Through a Prism
  
  Select activity Minimum deviation in prism
  
  Minimum deviation in prism Lesson
  
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  Select activity Deriving prism formula
  
  Deriving prism formula Lesson
  
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  Dispersion by a Prism
  
  Select activity Dispersion
  
  
  
  Dispersion Lesson
  
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  Select activity Prism & dispersion of light
  
  
  
  Prism & dispersion of light Lesson
  
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  Select activity Newton's prism experiment
  
  
  
  Newton's prism experiment Lesson
  
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  Some Natural Phenomena Due To Sunlight
  
  Select activity Scattering of light & Tyndall effect
  
  
  
  Scattering of light & Tyndall effect Lesson
  
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  Select activity Why is the sky blue (and the sun yellow)?
  
  
  
  Why is the sky blue (and the sun yellow)? Lesson
  
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  Select activity Why do stars twinkle (but planets don't)?
  
  
  
  Why do stars twinkle (but planets don't)? Lesson
  
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  Optical Instruments
  
  Select activity Parts of the eye | Human eye & the colourful world
  
  
  
  Parts of the eye | Human eye & the colourful world Lesson
  
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  Select activity Human eye: accommodation and near point
  
  
  
  Human eye: accommodation and near point Lesson
  
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  Select activity Myopia & Hypermetropia
  
  
  
  Myopia & Hypermetropia Lesson
  
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  Select activity Numerical on myopia
  
  
  
  Numerical on myopia Lesson
  
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  Select activity Numerical on hypermetropia
  
  
  
  Numerical on hypermetropia Lesson
  
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  Select activity Presbyopia
  
  
  
  Presbyopia Lesson
  
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  Select activity Concave mirror applications
  
  
  
  Concave mirror applications Lesson
  
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  Select activity Simple microscope
  
  
  
  Simple microscope Lesson
  
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  Select activity Simple microscope - max & min power
  
  
  
  Simple microscope - max & min power Lesson
  
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  Select activity Compound microscope
  
  
  
  Compound microscope Lesson
  
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  Select activity Compound microscope Numerical
  
  
  
  Compound microscope Numerical Lesson
  
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  Select activity How telescopes work
  
  
  
  How telescopes work Lesson
  
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  Select activity Magnifying power of telescope
  
  
  
  Magnifying power of telescope Lesson
  
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  Select activity Telescope numerical
  
  
  
  Telescope numerical Lesson
  
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