Physics
A sphere rolls down on two inclined planes of different angles but same height, it does so

In the same time
With the same speed
In the same time with the same kinetic energy
In the same time with the same speed

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Physics
We always see the same face of the moon, because

It revolves on its axis in adirection opposite to that ofthe earth
It is smaller than the earth
It rotates at the same speed as the earth around the sun
It takes equal time for revolution around the earth and rotation on its own axis

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