What is the best description of the destructive interference of light? A. The crest of one wave overlaps with the trough of another.

B. The crests of two waves intersect.

C. A longitudinal wave meets a transverse light wave.

D. A mechanical wave meets an electromagnetic wave.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

The dot diagram represents the motion of the motorcycle as it moves from left to right

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f