Physics - Khan Academy + Learn from the Masters

Section outline

Select section General

Collapse Expand
General

Collapse all Expand all
Select section 1. Units & Measurement

Collapse Expand
1. Units & Measurement
- Collapse Expand
  The International System of Units
  
  Select activity Definition of Unit
  
  Definition of Unit Lesson
  
  Students must
  
  Mark as done
  
  Select activity Units and Dimensions
  
  Units and Dimensions Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Significant Figures
  
  Select activity Significant Figures
  
  
  
  Significant Figures Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity More on Significant Figures
  
  
  
  More on Significant Figures Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Multiplying and Dividing with Significant Figures
  
  
  
  Multiplying and Dividing with Significant Figures Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Addition and Subtraction with Significant Figures
  
  
  
  Addition and Subtraction with Significant Figures Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Why do we need Significant Figures?
  
  
  
  Why do we need Significant Figures? Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Rules for Determining Significant Figures
  
  
  
  Rules for Determining Significant Figures Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Scientific Notation Examples
  
  
  
  Scientific Notation Examples Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Express a Small Number in Scientific Notation (Example)
  
  
  
  Express a Small Number in Scientific Notation (Example) Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Dimensions of Physical Quantities
  
  Select activity Fundamental and Derived Quantities
  
  Fundamental and Derived Quantities Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Dimensional Formulae and Dimensional Equations
  
  Select activity Dimensional Formulae
  
  Dimensional Formulae Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Dimensional Equations
  
  Dimensional Equations Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Dimensional Analysis and its Applications
  
  Select activity 1st Application of Dimensional Analysis
  
  
  
  1st Application of Dimensional Analysis Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity 2nd Application of Dimensional Analysis
  
  
  
  2nd Application of Dimensional Analysis Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Changing Units from One System to Other
  
  
  
  Changing Units from One System to Other Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Dimensional Analysis
  
  
  
  Worked Example: Dimensional Analysis Lesson
  
  Not available for guest users. Please register to access the content.
Select section 2. Motion in a Straight Line

Collapse Expand
2. Motion in a Straight Line
- Collapse Expand
  Introduction
  
  Select activity Distance and Displacement
  
  
  
  Distance and Displacement Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Distance and Displacement in one Dimension
  
  
  
  Distance and Displacement in one Dimension Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Calculating Average Velocity or Speed
  
  
  
  Calculating Average Velocity or Speed Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Average Velocity and Speed Worked Example
  
  
  
  Average Velocity and Speed Worked Example Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Instantaneous Velocity and Speed
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Acceleration
  
  Select activity Why Distance is Area Under Velocity-Time Line?
  
  
  
  Why Distance is Area Under Velocity-Time Line? Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Acceleration
  
  
  
  Acceleration Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Airbus a380 take-off Time
  
  
  
  Airbus a380 take-off Time Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Acceleration vs. Time Graphs
  
  
  
  Acceleration vs. Time Graphs Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Acceleration of Aircraft Carrier take-off
  
  
  
  Acceleration of Aircraft Carrier take-off Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Airbus a380 take-off Distance
  
  
  
  Airbus a380 take-off Distance Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Area under a Curved Graph
  
  
  
  Area under a Curved Graph Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Plotting Projectile Displacement, Acceleration and Velocity
  
  
  
  Plotting Projectile Displacement, Acceleration and Velocity Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Projectile Height Given Time
  
  
  
  Projectile Height Given Time Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Direction of Acceleration and Velocity
  
  
  
  Worked Example: Direction of Acceleration and Velocity Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Area Below v-t Graph
  
  
  
  Worked Example: Area Below v-t Graph Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Effects of Acceleration
  
  
  
  Worked Example: Effects of Acceleration Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Properties of Distance and Displacement
  
  
  
  Worked Example: Properties of Distance and Displacement Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Kinematic Equations for Uniformly Accelerated Motion
  
  Select activity Choosing Kinematic Equations
  
  
  
  Choosing Kinematic Equations Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Impact Velocity from given Height
  
  
  
  Impact Velocity from given Height Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Calculating Car's Velocity using Skid Marks
  
  
  
  Calculating Car's Velocity using Skid Marks Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Sign of Gravity in Free Fall
  
  
  
  Sign of Gravity in Free Fall Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Motion Problems (with Definite Integrals)
  
  
  
  Worked Example: Motion Problems (with Definite Integrals) Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Worked Example: Free Fall, Object Thrown up from a Building
  
  
  
  Worked Example: Free Fall, Object Thrown up from a Building Lesson
  
  Not available for guest users. Please register to access the content.
Select section 3. Motion in a Plane

Collapse Expand
3. Motion in a Plane

Not available for guest users. Please register to access the content.
Select section 4. Laws of Motion

Collapse Expand
4. Laws of Motion
- Collapse Expand
  Aristotle's Fallacy
  
  Select activity Aristotle's Fallacy
  
  Aristotle's Fallacy Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Law of Inertia
  
  Select activity Explanation of Law of Inertia
  
  Explanation of Law of Inertia Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Newton’s First Law of Motion
  
  Select activity Newton's First Law of Motion Concepts
  
  Newton's First Law of Motion Concepts Lesson
  
  Students must
  
  Mark as done
  
  Select activity Newton's First Law of Motion
  
  Newton's First Law of Motion Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Newton’s Second Law of Motion
  
  Select activity Newton's Second Law of Motion
  
  
  
  Newton's Second Law of Motion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Introduction to Momentum
  
  
  
  Introduction to Momentum Lesson
  
  Students must
  
  Mark as done
  
  Select activity Impulse and Momentum Dodgeball Example
  
  
  
  Impulse and Momentum Dodgeball Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bouncing Fruit Collision Example
  
  
  
  Bouncing Fruit Collision Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Momentum: Ice Skater Throws a Ball
  
  
  
  Momentum: Ice Skater Throws a Ball Lesson
  
  Students must
  
  Mark as done
  
  Select activity 2-dimensional Momentum Problem I
  
  
  
  2-dimensional Momentum Problem I Lesson
  
  Students must
  
  Mark as done
  
  Select activity 2-dimensional Momentum Problem II
  
  
  
  2-dimensional Momentum Problem II Lesson
  
  Students must
  
  Mark as done
  
  Select activity Change in Momentum from Force-Time Graphs
  
  
  
  Change in Momentum from Force-Time Graphs Lesson
  
  Students must
  
  Mark as done
  
  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
  
  Students must
  
  Mark as done
- Collapse Expand
  Newton’s Third Law of Motion
  
  Select activity Newton's Third Law of Motion
  
  
  
  Newton's Third Law of Motion Lesson
  
  Students must
  
  Mark as done
  
  Select activity More on Newton's Third Law
  
  
  
  More on Newton's Third Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Example: Analysing Motion using Newton's Laws
  
  
  
  Example: Analysing Motion using Newton's Laws Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Conservation of Momentum
  
  Select activity Momentum Conservation Derivation (2 Bodies Colliding)
  
  Momentum Conservation Derivation (2 Bodies Colliding) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Momentum Conservation - Solved Example
  
  Momentum Conservation - Solved Example Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Equilibrium of a Particle
  
  Select activity Explanation of the Equilibrium of a particle
  
  Explanation of the Equilibrium of a particle Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Common Forces in Mechanics
  
  Select activity Force of Friction keeping the Block Stationary
  
  
  
  Force of Friction keeping the Block Stationary Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Correction to Force of Friction keeping the Block Stationary
  
  
  
  Correction to Force of Friction keeping the Block Stationary Lesson
  
  Students must
  
  Mark as done
  
  Select activity Force of Friction keeping Velocity Constant
  
  
  
  Force of Friction keeping Velocity Constant Lesson
  
  Students must
  
  Mark as done
  
  Select activity Intuition on Static and Kinetic Friction Comparisons
  
  
  
  Intuition on Static and Kinetic Friction Comparisons Lesson
  
  Students must
  
  Mark as done
  
  Select activity Static and Kinetic Friction Example
  
  
  
  Static and Kinetic Friction Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Forces and Motion
  
  
  
  Worked Example: Forces and Motion Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Circular Motion
  
  Select activity Introduction to Centripetal Force
  
  
  
  Introduction to Centripetal Force Lesson
  
  Students must
  
  Mark as done
  
  Select activity Identifying Centripetal Force for Ball on String
  
  
  
  Identifying Centripetal Force for Ball on String Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Identifying Centripetal Force for Cars and Satellites
  
  
  
  Identifying Centripetal Force for Cars and Satellites Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Centripetal Force Problem Solving
  
  
  
  Centripetal Force Problem Solving Lesson
  
  Students must
  
  Mark as done
  
  Select activity Yo-Yo in Vertical Circle Example
  
  
  
  Yo-Yo in Vertical Circle Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bowling Ball in Vertical Loop
  
  
  
  Bowling Ball in Vertical Loop Lesson
  
  Students must
  
  Mark as done
  
  Select activity Mass Swinging in a Horizontal Circle
  
  
  
  Mass Swinging in a Horizontal Circle Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Is Centripetal Force a New type of Force?
  
  
  
  Is Centripetal Force a New type of Force? Lesson
  
  Not available for guest users. Please register to access the content.
- Collapse Expand
  Solving Problems in Mechanics
  
  Select activity Types of Forces and Free Body Diagrams
  
  
  
  Types of Forces and Free Body Diagrams Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Breaking Down Forces for Free Body Diagrams
  
  
  
  Breaking Down Forces for Free Body Diagrams Lesson
  
  Not available for guest users. Please register to access the content.
  
  Select activity Free Body Diagram with Angled Forces: Worked Example
  
  
  
  Free Body Diagram with Angled Forces: Worked Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Tension in a Rope
  
  
  
  Worked Example: Tension in a Rope Lesson
  
  Students must
  
  Mark as done
Select section 5. Work, Energy and Power

Collapse Expand
5. Work, Energy and Power
- Collapse Expand
  Introduction
  
  Select activity The dot product
  
  The dot product Lesson
  
  Students must
  
  Mark as done
  
  Select activity Conservative and Non Conservative Forces
  
  Conservative and Non Conservative Forces Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Notions of Work and Kinetic Energy
  
  Select activity Work and the Work-Energy Principle
  
  Work and the Work-Energy Principle Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Work
  
  Select activity Work as Area Under Curve
  
  Work as Area Under Curve Lesson
  
  Students must
  
  Mark as done
  
  Select activity Work example problems
  
  Work example problems Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Kinetic Energy
  
  Select activity Example: Calculating work and KE from graphs
  
  Example: Calculating work and KE from graphs Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Work done by a variable force
  
  Select activity Work/energy problem with friction
  
  Work/energy problem with friction Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Work-Energy Theorem for a variable force
  
  Select activity Derivation of Work Energy Theorem
  
  Derivation of Work Energy Theorem Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Concept of Potential Energy
  
  Select activity Potential Energy
  
  Potential Energy Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Conservation of Mechanical Energy
  
  Select activity Law of Conservation of Energy
  
  
  
  Law of Conservation of Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Conservation of Energy
  
  
  
  Conservation of Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Conservative Forces
  
  
  
  Conservative Forces Lesson
  
  Students must
  
  Mark as done
  
  Select activity LOL Diagrams
  
  
  
  LOL Diagrams Lesson
  
  Students must
  
  Mark as done
  
  Select activity Work as the Transfer of Energy
  
  
  
  Work as the Transfer of Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Vertical Springs and Energy Conservation
  
  
  
  Vertical Springs and Energy Conservation Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Conservation of Energy
  
  
  
  Worked Example: Conservation of Energy Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Potential Energy of a Spring
  
  Select activity Introduction to Springs and Hooke's law
  
  
  
  Introduction to Springs and Hooke's law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Potential Energy stored in a spring
  
  
  
  Potential Energy stored in a spring Lesson
  
  Students must
  
  Mark as done
  
  Select activity Spring Potential Energy example
  
  
  
  Spring Potential Energy example Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Power
  
  Select activity Power
  
  Power Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Collisions
  
  Select activity Elastic and Inelastic collisions
  
  
  
  Elastic and Inelastic collisions Lesson
  
  Students must
  
  Mark as done
  
  Select activity Elastic and Inelastic collision in 2D
  
  
  
  Elastic and Inelastic collision in 2D Lesson
  
  Students must
  
  Mark as done
  
  Select activity Solving Elastic Collision Problems
  
  
  
  Solving Elastic Collision Problems Lesson
  
  Students must
  
  Mark as done
  
  Select activity Deriving the shortcut to solve Elastic Collision Problems
  
  
  
  Deriving the shortcut to solve Elastic Collision Problems Lesson
  
  Students must
  
  Mark as done
  
  Select activity How to use the shortcut for solving Elastic Collisions?
  
  
  
  How to use the shortcut for solving Elastic Collisions? Lesson
  
  Students must
  
  Mark as done
  
  Select activity What if humans could jump like fleas?
  
  
  
  What if humans could jump like fleas? Lesson
  
  Students must
  
  Mark as done
Select section 6. Systems of Particles and Rotational Motion

Collapse Expand
6. Systems of Particles and Rotational Motion
- Collapse Expand
  Centre of Mass
  
  Select activity Centre of Mass
  
  Centre of Mass Lesson
  
  Students must
  
  Mark as done
  
  Select activity Centre of Mass Equation
  
  Centre of Mass Equation Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Vector Product of Two Vectors
  
  Select activity Cross Product and Torque
  
  Cross Product and Torque Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Angular Velocity and its Relation with Linear Velocity
  
  Select activity Relating Angular and Regular Motion Variables
  
  Relating Angular and Regular Motion Variables Lesson
  
  Students must
  
  Mark as done
  
  Select activity Angular motion variables
  
  Angular motion variables Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Torque and Angular Momentum
  
  Select activity Introduction to Torque
  
  
  
  Introduction to Torque Lesson
  
  Students must
  
  Mark as done
  
  Select activity Moments I
  
  
  
  Moments I Lesson
  
  Students must
  
  Mark as done
  
  Select activity Moments II
  
  
  
  Moments II Lesson
  
  Students must
  
  Mark as done
  
  Select activity Finding Torque for Angled Forces
  
  
  
  Finding Torque for Angled Forces Lesson
  
  Students must
  
  Mark as done
  
  Select activity Constant Angular Momentum When No Net Torque
  
  
  
  Constant Angular Momentum When No Net Torque Lesson
  
  Students must
  
  Mark as done
  
  Select activity Angular Momentum Example
  
  
  
  Angular Momentum Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked example: Angular Impulse
  
  
  
  Worked example: Angular Impulse Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Moment of Inertia
  
  Select activity Rotational Kinetic Energy
  
  
  
  Rotational Kinetic Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Rotational version of Newton's Second Law
  
  
  
  Rotational version of Newton's Second Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity More on Moment of Inertia
  
  
  
  More on Moment of Inertia Lesson
  
  Students must
  
  Mark as done
  
  Select activity Radius of Gyration
  
  
  
  Radius of Gyration Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Kinematics of Rotational Motion about a Fixed Axis
  
  Select activity Rotational Kinematic Formulas
  
  Rotational Kinematic Formulas Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Torque and Angular Acceleration
  
  Worked Example: Torque and Angular Acceleration Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Angular Momentum in case of Rotations about a Fixed Axis
  
  Select activity Angular Momentum
  
  
  
  Angular Momentum Lesson
  
  Students must
  
  Mark as done
  
  Select activity Angular Momentum of an Extended Object
  
  
  
  Angular Momentum of an Extended Object Lesson
  
  Students must
  
  Mark as done
  
  Select activity Conservation of Angular Momentum
  
  
  
  Conservation of Angular Momentum Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked example: Conservation of Angular Momentum
  
  
  
  Worked example: Conservation of Angular Momentum Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Learn More…
  
  Select activity Rolling Without Slipping
  
  Rolling Without Slipping Lesson
  
  Students must
  
  Mark as done
Select section 7. Gravitation

Collapse Expand
7. Gravitation
- Collapse Expand
  Introduction
  
  Select activity Introduction to Gravity
  
  Introduction to Gravity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Mass and Weight Clarification
  
  Mass and Weight Clarification Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Kepler’s Laws
  
  Select activity Orbital Motion
  
  Orbital Motion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Kepler's Second Law
  
  Kepler's Second Law Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Universal Law of Gravitation
  
  Select activity Newton's Law of Gravitation
  
  Newton's Law of Gravitation Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Gravitational Constant
  
  Select activity The Gravitational Constant
  
  The Gravitational Constant Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Acceleration due to Gravity of the Earth
  
  Select activity Acceleration due to Gravity
  
  Acceleration due to Gravity Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  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
  
  Students must
  
  Mark as done
  
  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
  
  Students must
  
  Mark as done
- Collapse Expand
  Gravitational Potential Energy
  
  Select activity Gravitational Potential
  
  
  
  Gravitational Potential Lesson
  
  Students must
  
  Mark as done
  
  Select activity Gravitational Potential Energy at Large Distances
  
  
  
  Gravitational Potential Energy at Large Distances Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Gravitational Potential Energy of a System
  
  
  
  Worked Example: Gravitational Potential Energy of a System Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Escape Speed
  
  Select activity Would a Brick or Feather Fall Faster?
  
  Would a Brick or Feather Fall Faster? Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Earth Satellites
  
  Select activity Space Station Speed in Orbit
  
  
  
  Space Station Speed in Orbit Lesson
  
  Students must
  
  Mark as done
  
  Select activity Impact of Mass on Orbital Speed
  
  
  
  Impact of Mass on Orbital Speed Lesson
  
  Students must
  
  Mark as done
  
  Select activity Gravity for Astronauts in Orbit
  
  
  
  Gravity for Astronauts in Orbit Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Energy of an Orbiting Satellite
  
  Select activity Energy of satellite systems
  
  Energy of satellite systems Lesson
  
  Students must
  
  Mark as done
Select section 8. Mechanical Properties of Solids

Collapse Expand
8. Mechanical Properties of Solids
- Collapse Expand
  Introduction
  
  Select activity Elastic and Non Elastic Materials
  
  Elastic and Non Elastic Materials Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Stress and Strain
  
  Select activity Stress & Strain
  
  
  
  Stress & Strain Lesson
  
  Students must
  
  Mark as done
  
  Select activity Shear Stress and Strain
  
  
  
  Shear Stress and Strain Lesson
  
  Students must
  
  Mark as done
  
  Select activity Strain Example Problem
  
  
  
  Strain Example Problem Lesson
  
  Students must
  
  Mark as done
  
  Select activity Femur Bone Example
  
  
  
  Femur Bone Example Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Hooke's Law
  
  Select activity Hooke's Law
  
  Hooke's Law Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Stress-Strain Curve
  
  Select activity Stress vs Strain Curve
  
  Stress vs Strain Curve Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Elastic Moduli
  
  Select activity Young's Modulus of Elasticity
  
  
  
  Young's Modulus of Elasticity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Shear Modulus
  
  
  
  Shear Modulus Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bulk Stress
  
  
  
  Bulk Stress Lesson
  
  Students must
  
  Mark as done
  
  Select activity Poisson's Ratio
  
  
  
  Poisson's Ratio Lesson
  
  Students must
  
  Mark as done
  
  Select activity Solved Example: Pressure Needed to Compress Water
  
  
  
  Solved Example: Pressure Needed to Compress Water Lesson
  
  Students must
  
  Mark as done
  
  Select activity Solved Example: Percentage Change in Density
  
  
  
  Solved Example: Percentage Change in Density Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Applications of Elastic Behaviour of Materials
  
  Select activity Why Use I Beams in Construction?
  
  
  
  Why Use I Beams in Construction? Lesson
  
  Students must
  
  Mark as done
  
  Select activity How to Strengthen Concrete?
  
  
  
  How to Strengthen Concrete? Lesson
  
  Students must
  
  Mark as done
  
  Select activity How Tall Can Mountains Get?
  
  
  
  How Tall Can Mountains Get? Lesson
  
  Students must
  
  Mark as done
Select section 9. Mechanical Properties of Fluids

Collapse Expand
9. Mechanical Properties of Fluids
- Collapse Expand
  Pressure
  
  Select activity Pressure and Pascal's Principle (Part 1)
  
  
  
  Pressure and Pascal's Principle (Part 1) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Pressure and Pascal's Principle (Part 2)
  
  
  
  Pressure and Pascal's Principle (Part 2) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Pressure at a Depth in a Fluid
  
  
  
  Pressure at a Depth in a Fluid Lesson
  
  Students must
  
  Mark as done
  
  Select activity Finding Height of Fluid in a Barometer
  
  
  
  Finding Height of Fluid in a Barometer Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Pressure due to Fluid
  
  
  
  Worked Example: Pressure due to Fluid Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Streamline Flow
  
  Select activity Volume Flow Rate and Equation of Continuity
  
  Volume Flow Rate and Equation of Continuity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Continuity Equation
  
  Worked Example: Continuity Equation Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Bernoulli’s Principle
  
  Select activity Bernoulli's Equation (Part 1)
  
  
  
  Bernoulli's Equation (Part 1) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bernoulli's Equation (Part 2)
  
  
  
  Bernoulli's Equation (Part 2) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bernoulli's Equation (Part 3)
  
  
  
  Bernoulli's Equation (Part 3) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bernoulli's Equation (Part 4)
  
  
  
  Bernoulli's Equation (Part 4) Lesson
  
  Students must
  
  Mark as done
  
  Select activity Bernoulli's Example Problem
  
  
  
  Bernoulli's Example Problem Lesson
  
  Students must
  
  Mark as done
  
  Select activity Venturi Effect and Pitot Tubes
  
  
  
  Venturi Effect and Pitot Tubes Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Viscosity
  
  Select activity Viscosity and Poiseiulle Flow
  
  Viscosity and Poiseiulle Flow Lesson
  
  Students must
  
  Mark as done
  
  Select activity Turbulence at High Velocities and Reynold's Number
  
  Turbulence at High Velocities and Reynold's Number Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Surface Tension
  
  Select activity Surface Tension and Adhesion
  
  
  
  Surface Tension and Adhesion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Surface Energy
  
  
  
  Surface Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Angle of Contact
  
  
  
  Angle of Contact Lesson
  
  Students must
  
  Mark as done
  
  Select activity Excess Pressure
  
  
  
  Excess Pressure Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Excess Pressure in a Drop
  
  
  
  Worked Example: Excess Pressure in a Drop Lesson
  
  Students must
  
  Mark as done
  
  Select activity Specific Gravity
  
  
  
  Specific Gravity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Capillary Rise
  
  
  
  Capillary Rise Lesson
  
  Students must
  
  Mark as done
  
  Select activity Capillary Action and Why We See a Meniscus
  
  
  
  Capillary Action and Why We See a Meniscus Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Surface Tension and Energy
  
  
  
  Worked Example: Surface Tension and Energy Lesson
  
  Students must
  
  Mark as done
Select section 10. Thermal Properties of Matter

Collapse Expand
10. Thermal Properties of Matter
- Collapse Expand
  Temperature and Heat
  
  Select activity Thermal Energy, Temperature, and Heat
  
  Thermal Energy, Temperature, and Heat Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Measurement of Temperature
  
  Select activity Measurement of Temperature I
  
  
  
  Measurement of Temperature I Lesson
  
  Students must
  
  Mark as done
  
  Select activity Measurement of Temperature II
  
  
  
  Measurement of Temperature II Lesson
  
  Students must
  
  Mark as done
  
  Select activity Relationship between Celsius & Fahrenheit
  
  
  
  Relationship between Celsius & Fahrenheit Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Ideal-gas Equation and Absolute Temperature
  
  Select activity Thermodynamics Part 1: Molecular theory of gases
  
  
  
  Thermodynamics Part 1: Molecular theory of gases Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermodynamics Part 2: Ideal Gas Law
  
  
  
  Thermodynamics Part 2: Ideal Gas Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermodynamics Part 3: Kelvin Scale and Ideal Gas Law Example
  
  
  
  Thermodynamics Part 3: Kelvin Scale and Ideal Gas Law Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Absolute Temperature and the Kelvin Scale
  
  
  
  Absolute Temperature and the Kelvin Scale Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Thermal Expansion
  
  Select activity Introduction to Thermal Expansion
  
  
  
  Introduction to Thermal Expansion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Linear Expansion
  
  
  
  Linear Expansion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Linear Expansion Numerical
  
  
  
  Linear Expansion Numerical Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Expansion of Ring
  
  
  
  Thermal Expansion of Ring Lesson
  
  Students must
  
  Mark as done
  
  Select activity Area Expansion Coefficient
  
  
  
  Area Expansion Coefficient Lesson
  
  Students must
  
  Mark as done
  
  Select activity Volume Expansion Coefficient
  
  
  
  Volume Expansion Coefficient Lesson
  
  Students must
  
  Mark as done
  
  Select activity Volume Expansion Numerical
  
  
  
  Volume Expansion Numerical Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Expansion in Liquids
  
  
  
  Thermal Expansion in Liquids Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Expansion in Gas
  
  
  
  Thermal Expansion in Gas Lesson
  
  Students must
  
  Mark as done
  
  Select activity Anomalous Expansion of Water
  
  
  
  Anomalous Expansion of Water Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Stress
  
  
  
  Thermal Stress Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Specific Heat Capacity
  
  Select activity Specific Heat and Latent Heat of Fusion and Vaporisation
  
  Specific Heat and Latent Heat of Fusion and Vaporisation Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Change of State
  
  Select activity Effect of Temperature and Pressure on State Change
  
  Effect of Temperature and Pressure on State Change Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Heat Transfer
  
  Select activity Thermal Conduction, Convection, and Radiation
  
  
  
  Thermal Conduction, Convection, and Radiation Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Conduction
  
  
  
  Thermal Conduction Lesson
  
  Students must
  
  Mark as done
  
  Select activity Thermal Conductivity of Metal and Wood
  
  
  
  Thermal Conductivity of Metal and Wood Lesson
  
  Students must
  
  Mark as done
  
  Select activity Intuition behind Formula for Thermal Conductivity
  
  
  
  Intuition behind Formula for Thermal Conductivity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Example: Equivalent Thermal Conductivity
  
  
  
  Example: Equivalent Thermal Conductivity Lesson
  
  Students must
  
  Mark as done
  
  Select activity Wien Displacement Law
  
  
  
  Wien Displacement Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Stefan-Boltzmann Law
  
  
  
  Stefan-Boltzmann Law Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Newton’s Law of Cooling
  
  Select activity Newton's Law of Cooling
  
  Newton's Law of Cooling Lesson
  
  Students must
  
  Mark as done
  
  Select activity Applying Newton's Law of Cooling to Warm Oatmeal
  
  Applying Newton's Law of Cooling to Warm Oatmeal Lesson
  
  Students must
  
  Mark as done
Select section 11. Thermodynamics

Collapse Expand
11. Thermodynamics
- Collapse Expand
  Thermal Equilibrium & Zeroth Law of Thermodynamics
  
  Select activity Thermal Equilibrium
  
  Thermal Equilibrium Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Heat, Internal Energy and Work
  
  Select activity Work from Expansion
  
  
  
  Work from Expansion Lesson
  
  Students must
  
  Mark as done
  
  Select activity pv-Diagrams and Expansion Work
  
  
  
  pv-Diagrams and Expansion Work Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Internal Energy
  
  
  
  Worked Example: Internal Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Example: Sign of Work, Heat and Internal Energy
  
  
  
  Example: Sign of Work, Heat and Internal Energy Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  First Law of Thermodynamics
  
  Select activity First Law of Thermodynamics / Internal Energy
  
  
  
  First Law of Thermodynamics / Internal Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity More on Internal Energy
  
  
  
  More on Internal Energy Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: First Law of Thermodynamics
  
  
  
  Worked Example: First Law of Thermodynamics Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: First Law of Thermo-Cyclic Processes
  
  
  
  Worked Example: First Law of Thermo-Cyclic Processes Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Specific Heat Capacity
  
  Select activity Heat Capacity at Constant Volume and Pressure
  
  
  
  Heat Capacity at Constant Volume and Pressure Lesson
  
  Students must
  
  Mark as done
  
  Select activity Proof: u=(3/2)pv or u=(3/2)nrt
  
  
  
  Proof: u=(3/2)pv or u=(3/2)nrt Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Work from pv Diagram
  
  
  
  Worked Example: Work from pv Diagram Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Thermodynamic State Variables and Equation of State
  
  Select activity Macrostates and Microstates
  
  Macrostates and Microstates Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Thermodynamic Processes
  
  Select activity Quasistatic and Reversible Processes
  
  Quasistatic and Reversible Processes Lesson
  
  Students must
  
  Mark as done
  
  Select activity Work done by Isothermic Process
  
  Work done by Isothermic Process Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Second Law of Thermodynamics
  
  Select activity First and Second Laws of Thermodynamics
  
  First and Second Laws of Thermodynamics Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Reversible and Irreversible Processes
  
  Select activity Reversible process
  
  Reversible process Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Carnot Engine
  
  Select activity Carnot Cycle and Carnot Engine
  
  
  
  Carnot Cycle and Carnot Engine Lesson
  
  Students must
  
  Mark as done
  
  Select activity Proof: Volume Ratios in a Carnot Cycle
  
  
  
  Proof: Volume Ratios in a Carnot Cycle Lesson
  
  Students must
  
  Mark as done
  
  Select activity Efficiency of a Carnot Engine 1
  
  
  
  Efficiency of a Carnot Engine 1 Lesson
  
  Students must
  
  Mark as done
  
  Select activity Carnot Efficiency 2: Reversing the Cycle
  
  
  
  Carnot Efficiency 2: Reversing the Cycle Lesson
  
  Students must
  
  Mark as done
  
  Select activity Carnot Efficiency 3: Proving that it is the most efficient
  
  
  
  Carnot Efficiency 3: Proving that it is the most efficient Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Carnot Engine
  
  
  
  Worked Example: Carnot Engine Lesson
  
  Students must
  
  Mark as done
Select section 12. Kinetic Theory

Collapse Expand
12. Kinetic Theory
- Collapse Expand
  Behaviour of Gases
  
  Select activity Boyle's Law
  
  
  
  Boyle's Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Charles's Law
  
  
  
  Charles's Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Avogadro's Law
  
  
  
  Avogadro's Law Lesson
  
  Students must
  
  Mark as done
  
  Select activity Ideal Gas Equation: pv = nrt
  
  
  
  Ideal Gas Equation: pv = nrt Lesson
  
  Students must
  
  Mark as done
  
  Select activity Ideal Gas Equation Example 1
  
  
  
  Ideal Gas Equation Example 1 Lesson
  
  Students must
  
  Mark as done
  
  Select activity Ideal Gas Equation Example 2
  
  
  
  Ideal Gas Equation Example 2 Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Kinetic Theory of an Ideal Gas
  
  Select activity Kinetic Energy of Gas
  
  
  
  Kinetic Energy of Gas Lesson
  
  Students must
  
  Mark as done
  
  Select activity Introduction to Partial Pressure
  
  
  
  Introduction to Partial Pressure Lesson
  
  Students must
  
  Mark as done
  
  Select activity Partial Pressure Example
  
  
  
  Partial Pressure Example Lesson
  
  Students must
  
  Mark as done
  
  Select activity Kinetic Molecular Theory of Gases
  
  
  
  Kinetic Molecular Theory of Gases Lesson
  
  Students must
  
  Mark as done
  
  Select activity The Maxwell–Boltzmann Distribution
  
  
  
  The Maxwell–Boltzmann Distribution Lesson
  
  Students must
  
  Mark as done
  
  Select activity Boltzmann's Constant
  
  
  
  Boltzmann's Constant Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked example: RMS Speed and Average KE of Gas Molecules
  
  
  
  Worked example: RMS Speed and Average KE of Gas Molecules Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Law of Equipartition of Energy
  
  Select activity Law of Equipartition of Energy
  
  Law of Equipartition of Energy Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Specific Heat Capacity
  
  Select activity Degree of Freedom
  
  Degree of Freedom Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Mean Free Path
  
  Select activity Mean Free Path
  
  Mean Free Path Lesson
  
  Students must
  
  Mark as done
Select section 13. Oscillations

Collapse Expand
13. Oscillations
- Collapse Expand
  Periodic and Oscillatory Motions
  
  Select activity Definition of Amplitude and Period
  
  Definition of Amplitude and Period Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Find Frequency & Period from Displacement-Time Graph
  
  Worked Example: Find Frequency & Period from Displacement-Time Graph Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Simple Harmonic Motion
  
  Select activity Introduction to Harmonic Motion
  
  
  
  Introduction to Harmonic Motion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Harmonic Motion Part 2
  
  
  
  Harmonic Motion Part 2 Lesson
  
  Students must
  
  Mark as done
  
  Select activity Harmonic Motion Part 3
  
  
  
  Harmonic Motion Part 3 Lesson
  
  Students must
  
  Mark as done
  
  Select activity Phase Constant
  
  
  
  Phase Constant Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Simple Harmonic Motion and Uniform Circular Motion
  
  Select activity Equation for Simple Harmonic Oscillators
  
  Equation for Simple Harmonic Oscillators Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Velocity and Acceleration in Simple Harmonic Motion
  
  Select activity Worked Example: Find Velocity from Displacement Time Graph
  
  Worked Example: Find Velocity from Displacement Time Graph Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Force Law for Simple Harmonic Motion
  
  Select activity Period Dependence for Mass on Spring
  
  
  
  Period Dependence for Mass on Spring Lesson
  
  Students must
  
  Mark as done
  
  Select activity Intuition about Simple Harmonic Oscillators
  
  
  
  Intuition about Simple Harmonic Oscillators Lesson
  
  Students must
  
  Mark as done
  
  Select activity Example: Analysing Graphs of Spring-Mass System
  
  
  
  Example: Analysing Graphs of Spring-Mass System Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Energy in Simple Harmonic Motion
  
  Select activity Energy Graphs for Simple Harmonic Motion
  
  Energy Graphs for Simple Harmonic Motion Lesson
  
  Students must
  
  Mark as done
  
  Select activity Worked Example: Energy in a Simple Harmonic Motion
  
  Worked Example: Energy in a Simple Harmonic Motion Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Simple Pendulum
  
  Select activity Pendulums
  
  Pendulums Lesson
  
  Students must
  
  Mark as done
Select section 14. Waves

Collapse Expand
14. Waves
- Collapse Expand
  Introduction
  
  Select activity Introduction to Waves
  
  Introduction to Waves Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Transverse and Longitudinal Waves
  
  Select activity Types of Waves
  
  Types of Waves Lesson
  
  Students must
  
  Mark as done
  
  Select activity Definition of Waves
  
  Definition of Waves Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  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
  
  Students must
  
  Mark as done
  
  Select activity The Equation of a Wave
  
  
  
  The Equation of a Wave Lesson
  
  Students must
  
  Mark as done
  
  Select activity Example: frequency and amplitude from graphs
  
  
  
  Example: frequency and amplitude from graphs Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Speed of a Travelling Wave
  
  Select activity Speed of Sound
  
  Speed of Sound Lesson
  
  Students must
  
  Mark as done
  
  Select activity Relative Speed of Sound in Solids, Liquids, and Gases
  
  Relative Speed of Sound in Solids, Liquids, and Gases Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  The Principle of Superposition of Waves
  
  Select activity Wave Interference
  
  
  
  Wave Interference Lesson
  
  Students must
  
  Mark as done
  
  Select activity Constructive and Destructive Interference
  
  
  
  Constructive and Destructive Interference Lesson
  
  Students must
  
  Mark as done
  
  Select activity Production of Sound
  
  
  
  Production of Sound Lesson
  
  Students must
  
  Mark as done
  
  Select activity Sound Properties (Amplitude, Period, Frequency, Wavelength)
  
  
  
  Sound Properties (Amplitude, Period, Frequency, Wavelength) Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Reflection of Waves
  
  Select activity Standing Waves on Strings
  
  
  
  Standing Waves on Strings Lesson
  
  Students must
  
  Mark as done
  
  Select activity Standing Waves in Open Tubes
  
  
  
  Standing Waves in Open Tubes Lesson
  
  Students must
  
  Mark as done
  
  Select activity Standing Waves in Closed Tubes
  
  
  
  Standing Waves in Closed Tubes Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  Beats
  
  Select activity Beat Frequency
  
  Beat Frequency Lesson
  
  Students must
  
  Mark as done
  
  Select activity Derivation of Beat Frequency Formula
  
  Derivation of Beat Frequency Formula Lesson
  
  Students must
  
  Mark as done
- Collapse Expand
  New subsection

Started in 2023, JEET is on a Not-for-profit Mission to unite all the NGOs deeply engaged in education (sports & vocational included). The steering NGO of JEET is Ramakrishna Sarada Samti, www.rkssngo.org.

Physics - Khan Academy + Learn from the Masters

Section outline

About Us

Resources

Quick Link

Contact Us