Calculate the mass of the ice that requires 240000j to change its state to water

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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not too sure thinking all accelerations are pointed down

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle