A boy standing on a bridge 150m above the canyon floor throws a stone downward with a speed of 20.0m/s. A) with what velocity will it hit the ground?
B) How long will it take to descend?

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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joke:

h o h o hope you have a merry christmas!