An object's position in meters and motion in meters per second can be described by 2 = -18 – 3+ - +2 during the time interval 0 Which of the following statements is the best description of the object's motion?

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.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these