1. Charles' Law is a gas law that explains how and why gases get bigger, or "expand" when they are heated.
2. As the temperature of gas increases, the gas molecules move more quickly (because they get more energy in the form of heat.)
3. The first person to fly in a hydrogen balloon was Jacque Charles. The Robert brothers built it for him (Charles invented it), and Charles flew in it.
4. After Charles' first flight in the balloon (it got about fifteen miles outside of Paris, where it took off), it got ripped up by local townspeople because they were scared of it.
5. In the formula below, k is constant (same for all gases and constant pressures). This means that the pressure has to stay the same, and temperature and volume can change
Cites:
http://en.wikipedia.org/wiki/Charles's_law
http://en.wikipedia.org/wiki/Robert_brothers
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