Suppose you heat an oven to 400F and boil a pot of water. Which of the following explains why you would be burned by sticking your hand briefly in the pot but not by sticking your hand briefly in the oven?
A) The water can transfer heat to your arm more quickly than the air.
B) The water has a higher temperature than the oven.
C) The molecules in the water are moving faster than the molecules in the oven.
D) The oven has a higher temperature than the water.
Question 2
Suppose you measure the density (mass per volume) of an object moving by you at very high speed. How will its density compare to the density it would have at rest in your reference frame?
A) Its density would be lower.
B) Its density would be higher.
C) Its density would be the same.
D) There is no way to know, because relativity doesn't tell us anything about density.
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