Physics
Which type of mirror is used in the head lights of vehicles ?

Convex mirror
Parabolic mirror
Concave mirror
Plane mirror

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Physics
Which of the following options correctly explains the term heat budget?

It is the radiation from the earth in the form of long waves.
It is a mode of transfer of heat through matter by molecular activity.
It is the balance between incoming and outgoing radiation
It is the amount of heat which the surface of earth receives from the sun.

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