Example 7.3 Assume the height of the hill in fig 7.6 is 50 m,
calculate
the velocity of the car at the bottom of the hill
b. the height at which it will have half this speed.
Assume the car starts from rest at the top of the

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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.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!