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 the balance between incoming and outgoing radiation
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.

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Physics
For an ideal gas, which one of the following statements does not hold true?

The potential energy of the gas molecules is zero
The speed of all gas molecules is same
There is no interactive force between the molecules.
The kinetic energies of all gas molecules are not same

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