Physics
Water pipes in hilly areas often burst on a cold frosty night, because

Frost makes the pipes rusty, so they break
Water in the pipes freezes and on freezing water expands, so pipes break
None of these
The material of which pipes are made contracts due to cold and so breaks

ANSWER DOWNLOAD EXAMIANS APP

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

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 is smaller than the earth
It revolves on its axis in adirection opposite to that ofthe earth

ANSWER DOWNLOAD EXAMIANS APP