1. According to Boyle's law P₁V₁ = P₂V₂, What is assumed constant or unchanging?

2. What pressure scale must be used for Boyle's law?

3. If a cylinder of volume 15 in³ has a pressure gauge reading of 20 psi, and then is further compressed until the volume is 10 in³, what pressure will the gauge read.

4. In Charles' law, what are the assumed constants? Write the two state version of the equation.

5. What is Gay-Lussac's law, what is assumed unchanging?

6. What happens to the strength of a magnet as it is heated? Why?

7. How does the latent heat of fusion of water help slow the decrease of air temperatures, perhaps preventing temperatures from falling significantly below 0^oC , in the vicinity of large bodies of water?

8-9. If you place 0^oC ice into 0^oC water in an insulated container, what will happen? Will some ice melt, will more water freeze, or will neither take place? What is this ice bath used for?

10. When still air cools by radiating at night, it is unusual for temperatures to fall below the dew point. Explain why.

11. Why does ice melt on sunny days even if the temp stays below freezing?

12-13. If you pull enough of a vacuum can you boil water at room temperature? Does this explain cavitation in hydraulic systems? Can you cook food this way?

14. One method of getting a tight fit, say of a metal peg in a hole in a metal block, is to manufacture the peg slightly larger than the hole. The peg is then inserted when at a different temperature than the block. Should the block be hotter or colder than the peg during insertion? Explain your answer.

15. Does it really help to run hot water over a tight metal lid on a glass jar before trying to open it?