The doppler effect occurs when a source of sound moves
a. away from you.
b. toward you.
c. both a and b
d. none of the above

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not

Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum. determine the term.