A race car rounds a curve at 52 m/s. The radius of the curve is 441 m, and the car's mass is 695 kg. What is the car's (centripetal) acceleration? What Is It In G's? What Is the centripetal force acting on the car?

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

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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