Which of the following statements describes how a heat pump works?

1. the heat pump decompresses gas to warm and cool air.
2. the heat pump compresses gas to warm air and decompresses gas to cool air.
3. the heat pump compresses gas to warm and cool air.
4. the heat pump decompresses gas to warm air and compresses gas to cool air.

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

The force will determine the acceleration.

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next