Choose if the quantity indicated is a vector or a scalar. quantity: the duration of a train ride type of quantity:

If you put a helium-filled balloon in the refrigerator, what will happen?

Properties seen when one one substance changes to another are known as properties

In which of these samples do the molecules most likely have the most kinetic energy? (2 points) a. solid ice at -5°c b. ice water at 0°c c. liquid water at 98°c d. water vapor at 150°c