Acyclist rides at a constant speed of 4.5 m/s around a curve. if the centripetal acceleration is 29 m/s2, what is the radius of the curve? a) 0.16 m b) 0.70 m c) 6.4 m d) 34 m

B) 0.70 m

Explanation:

The centripetal acceleration is given by:

where

v is the speed (tangential speed)

r is the radius of the curve

In this case, we know the speed, v=4.5 m/s, and the centripetal acceleration, a=29 m/s^2, so we  can re-arrange the equation above to find the radius of the curve:

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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