Physics
Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:

Relative humidity
Mixing ratio
Specific humidity
Absolute humidity

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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 amount of heat which the surface of earth receives from the sun.
It is the balance between incoming and outgoing radiation

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Physics
Isotopes of an element contain

the same number of neutrons but different number of protons
the same number of protons but different number of neutrons
equal number of nucleons
equal number of protons and electrons

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