Arailroad track is being built on an inclined surface. what is the estimated height of the supporting pillar that will be erected at a horizontal distance of 200 meters from the start of the incline?

Which describe reflection? check all that apply. light bounces off a boundary.

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

What object a collides with object b and bounces back its final momentum is?