Refraction in Water. Created by Sal Khan.

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1. Introduction to physics | One-dimensional motion
2. Intro to vectors & scalars | One-dimensional motion
3. Calculating average velocity or speed | One-dimensional motion
4. Solving for time | One-dimensional motion
5. Displacement from time and velocity example | One-dimensional motion
6. Acceleration | One-dimensional motion
7. More on Newton's first law of motion
8. Newton's second law of motion | Forces and Newton's laws of motion
9. Newton's third law of motion | Forces and Newton's laws of motion
10. Airbus A380 take-off time | One-dimensional motion
11. Airbus A380 take-off distance | One-dimensional motion
12. Why distance is area under velocity-time line
13. Average velocity for constant acceleration | One-dimensional motion
14. Acceleration of aircraft carrier take-off | One-dimensional motion
15. Race cars with constant speed around curve
16. Introduction to gravity | Centripetal force and gravitation
17. Mass and weight clarification | Centripetal force and gravitation
18. Gravity for astronauts in orbit | Centripetal force and gravitation
19. Would a brick or feather fall faster?
20. Deriving displacement as a function of time, acceleration, and initial velocity
21. Plotting projectile displacement, acceleration, and velocity
22. Projectile height given time | One-dimensional motion
23. Deriving max projectile displacement given time
24. Impact velocity from given height | One-dimensional motion
25. Visualizing vectors in 2 dimensions | Two-dimensional motion
26. Projectile at an angle | Two-dimensional motion
27. Different way to determine time in air | Two-dimensional motion
28. Launching and landing on different elevations | Two-dimensional motion
29. Total displacement for projectile | Two-dimensional motion
30. Total final velocity for projectile | Two-dimensional motion
31. Correction to total final velocity for projectile
32. Projectile on an incline | Two-dimensional motion
33. Unit vectors and engineering notation | Two-dimensional motion
34. Optimal angle for a projectile part 1: Components of initial velocity
35. Optimal angle for a projectile part 2: Hangtime
36. Optimal angle for a projectile part 3: Horizontal distance as a function of angle (and speed)
37. Optimal angle for a projectile part 4: Finding the optimal angle and distance with a bit of calculus
38. Normal force and contact force | Forces and Newton's laws of motion
39. Normal force in an elevator | Forces and Newton's laws of motion
40. Inclined plane force components | Forces and Newton's laws of motion
41. Ice accelerating down an incline | Forces and Newton's laws of motion
42. Force of friction keeping the block stationary
43. Correction to force of friction keeping the block stationary
44. Force of friction keeping velocity constant
45. Intuition on static and kinetic friction comparisons
46. Static and kinetic friction example | Forces and Newton's laws of motion
47. Introduction to tension | Forces and Newton's laws of motion
48. Introduction to tension (part 2) | Forces and Newton's laws of motion
49. Tension in an accelerating system and pie in the face
50. Introduction to momentum | Impacts and linear momentum
51. Momentum: Ice skater throws a ball | Impacts and linear momentum
52. 2-dimensional momentum problem | Impacts and linear momentum
53. 2-dimensional momentum problem (part 2)
54. Introduction to work and energy | Work and energy
55. Work and energy (part 2) | Work and energy
56. Conservation of energy | Work and energy
57. Work/energy problem with friction | Work and energy
58. Introduction to mechanical advantage | Work and energy
59. Mechanical advantage (part 2) | Work and energy
60. Mechanical advantage (part 3) | Work and energy
61. Center of mass | Impacts and linear momentum
62. Introduction to torque | Moments, torque, and angular momentum
63. Moments | Moments, torque, and angular momentum
64. Moments (part 2) | Moments, torque, and angular momentum
65. Unit vector notation | Two-dimensional motion
66. Unit vector notation (part 2) | Two-dimensional motion
67. Projectile motion with ordered set notation
68. Centripetal force and acceleration intuition
69. Visual understanding of centripetal acceleration formula
70. Relationship between angular velocity and speed
71. Calculus proof of centripetal acceleration formula
72. Loop de loop question | Centripetal force and gravitation
73. Loop de loop answer part 1 | Centripetal force and gravitation
74. Loop de loop answer part 2 | Centripetal force and gravitation
75. Acceleration due to gravity at the space station
76. Space station speed in orbit | Centripetal force and gravitation
77. Conservation of angular momemtum
78. Introduction to Newton's law of gravitation
79. Gravitation (part 2) | Centripetal force and gravitation
80. Intro to springs and Hooke's law | Work and energy
81. Potential energy stored in a spring | Work and energy
82. Spring potential energy example (mistake in math)
83. Introduction to harmonic motion | Oscillatory motion
84. Harmonic motion part 2 (calculus) | Oscillatory motion
85. Harmonic motion part 3 (no calculus) | Oscillatory motion
86. Pressure and Pascal's principle (part 1) | Fluids
87. Pressure and Pascal's principle (part 2) | Fluids
88. Pressure at a depth in a fluid | Fluids
89. Finding height of fluid in a barometer | Fluids
90. Archimedes principle and buoyant force | Fluids
91. Buoyant force example problems | Fluids
92. Volume flow rate and equation of continuity | Fluids
93. Bernoulli's equation (part 1) | Fluids
94. Bernoulli's equation (part 2) | Fluids
95. Bernoulli's equation (part 3) | Fluids
96. Bernoulli's equation (part 4) | Fluids
97. Bernoulli's example problem | Fluids
98. Thermodynamics part 1: Molecular theory of gases
99. Thermodynamics part 2: Ideal gas law | Thermodynamics
100. Thermodynamics part 3: Kelvin scale and Ideal gas law example
101. Thermodynamics part 4: Moles and the ideal gas law
102. Thermodynamics part 5: Molar ideal gas law problem
103. Electrostatics (part 1): Introduction to Charge and Coulomb's Law
104. Electric field | Electric charge, electric force, and voltage
105. Proof: Field from infinite plate (part 1) | Electrostatics | Electrical engineering
106. Proof: Field from infinite plate (part 2) | Electrostatics | Electrical engineering
107. Electric potential energy | Electrostatics | Electrical engineering
108. Electric potential energy (part 2-- involves calculus)
109. Voltage | Electric charge, electric force, and voltage
110. Capacitance | Circuits
111. Introduction to circuits and Ohm's law | Circuits
112. Resistors in series | Circuits
113. Resistors in parallel | Circuits
114. Example: Analyzing a more complex resistor circuit
115. Cross product 1 | Magnetic forces, magnetic fields, and Faraday's law
116. Cross product 2 | Magnetic forces, magnetic fields, and Faraday's law
117. Cross product and torque | Moments, torque, and angular momentum
118. Introduction to magnetism
119. Magnetic force on a charge
120. Magnetic force on a proton example (part 1)
121. Magnetic force on a proton example (part 2)
122. Magnetic force on a current carrying wire
123. Magnetic field created by a current carrying wire
124. Magnetic force between two currents going in the same direction
125. Magnetic force between two currents going in opposite directions
126. Electric motors (part 1)
127. Electric motors (part 2)
128. Electric motors (part 3)
129. Induced current in a wire
130. The dot product | Magnetic forces, magnetic fields, and Faraday's law
131. Dot vs. cross product
132. Calculating dot and cross products with unit vector notation
133. Introduction to waves | Mechanical waves and sound
134. Amplitude, period, frequency and wavelength of periodic waves
135. Introduction to the doppler effect | Mechanical waves and sound
136. Doppler effect formula for observed frequency
137. Doppler effect formula when source is moving away
138. When the source and the wave move at the same velocity
139. Mach numbers | Mechanical waves and sound
140. Specular and diffuse reflection | Geometric optics
141. Specular and diffuse reflection 2 | Geometric optics
142. Refraction and Snell's law | Geometric optics
143. Refraction in water | Geometric optics
144. Snell's law example 1 | Geometric optics
145. Snell's law example 2 | Geometric optics
146. Total internal reflection | Geometric optics
147. Virtual image | Geometric optics
148. Parabolic mirrors and real images | Geometric optics
149. Parabolic mirrors 2 | Geometric optics
150. Convex parabolic mirrors | Geometric optics
151. Convex lenses | Geometric optics
152. Convex lens examples | Geometric optics
153. Concave lenses | Geometric optics
154. Object image and focal distance relationship (proof of formula)
155. Object image height and distance relationship | Geometric optics
156. Viewing g as the value of Earth's gravitational field near the surface

A collection of physics tutorials prepared by Khan Academy's Sal Khan.
Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

Topics include: Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.