00:04 - 02:19
2m 15s
Phil walks us through the different layers of the atmosphere. He explains what we can expect to find at each layer and the concentration of air molecules at each level.
Video Transcript
Related Clips
Lois removes the krytonite to save Superman. Superman is weak but flies above the clouds to take in energy from the Sun and recharge.
02:21
This beginning scene of Wall-E depicts a post-acopalyptic Earth. The Earth has an enormous amount of environmental pollution and trash. There is little life in sight besides Wall-E and a cockroach.
Phil shows off several new materials that scientists and engineers have created. He mentions that they are created both for fun and for practical applications. He describes several new materials, such as a thermochromic mug and nitonol wire, and demonstrates how they work.
Phil explains and illustrates Newton's first law of motion and angular momentum using a 20 kg weight. In the experiment, they are having trouble spinning the weight fast enough. They eventually spin it fast enough that it doesn't topple over immediately.
John Green explains the beginning of the US government, Washington's Presidency, and the start of Political Parties.