Which of the following is a part of a wave?
a. crest
c. trough
b. drift
d. both a and c

Several students in the group made comments to the coach about the back pack. which student has the correct analysis of the forces and motion of the back pack?

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.