Which of the following two quantities are reciprocals of each other

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Give an example in which the electrical energy changes to light energy