A reflecting will have a mirror on the bottom where the light will bounce off a retracting uses lenses that focus the light
F = m * a
a = F / m = 2.050.000 N / 40.000 kg ( 1 N = 1 kgm/s² )
a = 51.25 m/s²
Air, because it is the least dense material listed, meaning that light can travel through it quicker because there are less particles for it to collide with which would cause it to slow down as it loses energy with each collision
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Explanation:
False. p waves, than s waves