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

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

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Physics
A Fuse wire is characterised by

High resistance and high melting point
High resistance and low melting point
Low resistance and low melting point
Low resistance and high melting point

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