Physics
The impurity atoms with which silicon should be doped to make p-type semiconductors are

Germanium
Boron
Antimony
Phosphorus

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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 the balance between incoming and outgoing radiation
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.

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