Videos
AP Physics 2
Pick a topic to watch.
7 video lessons
8:56
Topic 9
Thermodynamics
Put a hot cup of coffee on a table. It always cools down. It never warms back up by taking heat out of the cool room. Both directions would balance the energy…
8:04
Topic 10
Electric Force, Field, and Potential
A thundercloud is a charge factory. Ice crystals crash inside it, and electrons collect at the bottom of the cloud. The ground below turns positive. Nothing…
7:45
Topic 11
Electric Circuits
You flip a switch, and the light comes on at once. So the electrons must be racing down the wire. They are not. Inside copper, electrons crawl — less than a…
9:21
Topic 12
Magnetism and Electromagnetism
High over the Arctic, the night sky glows green. These curtains of light are not fire. They are charged particles from the Sun, arriving at a million…
9:32
Topic 13
Geometric Optics
Put a straight pencil into a glass of water, and it looks broken. Look into the bowl of a shiny spoon, and your face is upside down. Nothing bent, and nothing…
7:50
Topic 14
Waves, Sound, and Physical Optics
Blow a soap bubble and look closely. The film is thinner than a hair and has no colour of its own, and the light falling on it is plain white light. Yet the…
9:32
Topic 15
Modern Physics
By nineteen hundred, physics looked finished. Then three experiments broke it. A hot glowing object gave out the wrong colours. Light falling on a metal…