Khan Academy for Prelim and HSC Physics

The Khan Academy is an online educational resource with short (up to 10 minute) lectures on different topics. Below are the Khan Academy videos relevant to Preliminary & HSC Physics.

So - if you didn't quite get something in the last two years and you want it explained again,
Or - if you want some extra worked examples for numerical calculations
Or - you want to hear things explained in a new way,

I recommend you watch the videos below.

But please, no matter how well-intentioned, please don't say "Thanks, I never understood xxxxx before - but now I do thanks to those videos" - even though I will be really happy for you, my professional pride will be wounded.

THE WORLD COMMUNICATES

1. Introduction to Waves
2. Amplitude, Period, Frequency and Wavelength of Periodic Waves
3. Introduction to the Doppler Effect
4. Specular and Diffuse Reflection
5. Specular and Diffuse Reflection 2
6. Refraction and Snell's Law
7. Refraction in Water
8. Snell's Law Examples 1
9. Snell's Law Example 2
10. Total Internal Reflection

ELECTRICAL ENERGY IN THE HOME

11. Electrostatics (part 1): Introduction to Charge and Coulomb's Law
12. Electrostatics (part 2)
13. Electric Potential Energy
14. Voltage
15. Circuits (part 1)
16. Circuits (part 2)
17. Circuits (part 3)
18. Circuits (part 4)
19. Introduction to Magnetism

MOVING ABOUT

20. Introduction to Vectors and Scalars
21. Calculating Average Velocity or Speed
22. Solving for Time
23. Displacement from Time and Velocity Example
24. Acceleration
25. Newton's First Law of Motion
26. Newton's Second Law of Motion
27. Newton's Third Law of Motion
28. Airbus A380 Take-off Time
29. Airbus A380 Take-off Distance
30. Why Distance is Area under Velocity-Time Line
31. Average Velocity for Constant Acceleration
32. Acceleration of Aircraft Carrier Takeoff
33. Race Cars with Constant Speed Around Curve
34. Deriving Displacement as a Function of Time, Acceleration and Initial Velocity
35. Visualizing Vectors in 2 Dimensions
36. Normal Force and Contact Force
37. Normal Force in an Elevator
38. Inclined Plane Force Components
39. Ice Accelerating Down an Incline
40. Force of Friction Keeping the Block Stationary
41. Correction to Force of Friction Keeping the Block Stationary
42. Force of Friction Keeping Velocity Constant
43. Introduction to Momentum
44. Momentum: Ice skater throws a ball
45. 2-dimensional momentum problem
46. 2-dimensional momentum problem (part 2)
47. Introduction to work and energy
48. Work and Energy (part 2)
49. Conservation of Energy
50. Work/Energy problem with Friction

COSMIC ENGINE

1. Scale of Earth and Sun
2. Scale of Solar System
3. Scale of Distance to Closest Stars
4. Scale of the Galaxy
5. Intergalactic Scale
6. Hubble Image of Galaxies
7. Big Bang Introduction
8. Radius of Observable Universe
9. (Correction) Radius of Observable Universe
10. Red Shift
11. Cosmic Background Radiation
12. Cosmic Background Radiation 2
13. Cosmological Time Scale 1
14. Cosmological Time Scale 2
15. Birth of Stars
16. Becoming a Red Giant
17. White and Black Dwarfs
18. Hubble's Law
19. Lifecycle of Massive Stars
20. Supernova (Supernovae)
21. Supernova clarification
22. Black Holes

SPACE

51. Introduction to Gravity
52. Mass and Weight Clarification
53. Viewing g as the value of Earth's Gravitational Field Near the
54. Gravity for Astronauts in Orbit
55. Would a Brick or Feather Fall Faster
56. Normal Force and Contact Force
57. Normal Force in an Elevator
58. Plotting Projectile Displacement, Acceleration, and Velocity
59. Projectile Height Given Time
60. Deriving Max Projectile Displacement Given Time
61. Impact Velocity From Given Height
62. Visualizing Vectors in 2 Dimensions
63. Projectile at an Angle
64. Different Way to Determine Time in Air
65. Launching and Landing on Different Elevations
66. Total Displacement for Projectile
67. Total Final Velocity for Projectile
68. Correction to Total Final Velocity for Projectile
69. Centripetal Force and Acceleration Intuition
70. Visual Understanding of Centripetal Acceleration Formula
71. Loop De Loop Question
72. Loop De Loop Answer part 1
73. Loop De Loop Answer part 2
74. Acceleration Due to Gravity at the Space Station
75. Space Station Speed in Orbit
76. Introduction to Newton's Law of Gravitation
77. Gravitation (part 2)

MOTORS & GENERATORS

78. Introduction to Torque
79. Moments
80. Magnetism 2
81. Magnetism 3
82. Magnetism 4
83. Magnetism 5
84. Magnetism 6: Magnetic field due to current
85. Magnetism 7
86. Magnetism 8
87. Magnetism 9: Electric Motors
88. Magnetism 10: Electric Motors
89. Magnetism 11: Electric Motors
90. Magnetism 12: Induced Current in a Wire
91. Introduction to Magnetism

IDEAS TO IMPEMENTATION

92. Magnetism 2
93. Magnetism 3
94. Magnetism 4
95. Magnetism 5

QUANTA TO QUARKS

96. Four Fundamental Forces
97. Types of Decay
98. Half-Life