Physics
Oil rises up the wick in a lamp because

Of the diffusion of oil through the wick
Oil is very light
Of the surface tension phenomenon
Of the capillary action phenomenon

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

It is a mode of transfer of heat through matter by molecular activity.
It is the radiation from the earth in the form of long waves.
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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