In lab, you attach one end of an ideal spring (of negligible mass) to a wall and the other end of the spring to a 0.200kg pascar that sits at rest on a frictionless, horizontal track. you then pull the pascar horizontally and let go, causing it start it oscillating. the elapsed time from when the pascar first moves through the equilibrium point to the second time it moves through the equilibrium point is 2.60s. find the spring constant, k, of the spring.

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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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."