A source emits sound at a fixed constant frequency f. If the source moves away from you, the frequency you hear is lower than f.

You can see your image in a mirror because of

Two charged bodies separated by a distance d exert a repulsive electrical force on each other. The signs of the charges on the two bodies might be __________. (Select all that apply.)

Two charged bodies separated by a distance d exert a repulsive electrical force on each other. The signs of the charges on the two bodies might be __________. (Select all that apply.)

An echo is a sound wave that has been

The advantage of a convex mirror is that it has a __________ field of view.

Water ripples are produced by making a cork oscillate up and down at a frequency of 5 Hz. The peaks of the ripples are 0.03 meters apart. What is the speed of the water ripples? (Type your final answer with units in the box below. Show your equation and work on your scratch paper, or include it in the box below.)

In the previous question about the movie projector, is the image produced a real or a virtual image?

An electric toaster operating on 120 volts draws a current of 9 amperes. What is the resistance of the toaster? (Type your final answer with units in the box below. Show your equation and work on your scratch paper, or include it in the box below.)

Current is the rate of flow of electric charge.