Physics
Woollen cloth protects the body from cold because

External heat rays enter into the body through the woollen cloth
It is a poor conductor of heat
It reflects heat
It is a good conductor of heat

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

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

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