Car headlights use concave mirrors. there's a concave mirror in the back of the headlight socket, and the actual light bulb is placed somewhere along the principal axis. your question for this essay: where should that bulb be placed for the best headlight design? should it be at the focal point? at the radius of curvature? somewhere else? explain your answer.

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.