If the Applied Force (force exerted) on both crates with the current Friction setting is 350, the acceleration a. is roughly 3.5 m/s2.
b. a constant 1 m/s2.
c. initially 1 m/s2, and then it increases as the crates' speed increases.

what type of charge does it have? negative

their crystal patterns have been disrupted by stress

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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i believe the answer is a hope it and is correct