Physics
If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

Convex
Plane
Cylindrical
Concave

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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 revolves on its axis in adirection opposite to that ofthe earth
It rotates at the same speed as the earth around the sun
It is smaller than the earth

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Physics
Inside an aeroplane, flying at a high altitude,

the pressure is the same as that outside.
normal atmospheric pressure is maintained by the use of air pumps.
normal humidity and partial vacuum are maintained.
the pressure inside is less than the pressure outside.

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