Light is described as a wave and sometimes as a particle. what evidence supports the wave nature of light? (a couple sentences will do)

Acube has a volume of 2011 cubic inches. what is the angle measure between a side of a cube and its interior diagonal?

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Which statement best explains why an object weight less on mercury than it does on earth