A 2.61 kg block slides DOWN a 15.0° incline with
mk=0.220.
What is its acceleration?
(Unit = m/s²)

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.