Physics
A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is

Less than the weight of the man
Greater than the weight of the man
Same as the weight of the man
Zero

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

It is the amount of heat which the surface of earth receives from the sun.
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 radiation from the earth in the form of long waves.

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