Physics
The following particles move with same kinetic energy. Which of them has maximum momentum ?

Alpha Particle
Proton
Electron
Deutron

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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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