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Internal energy and pressure of a gas per unit volume are related as:

1. P = (2/3)E
2. P = (3/2)E
3. P = (1/2)E
4. P = 2E

Correct answer: P = (2/3)E

Solution

The internal energy (E) of an ideal gas is related to its pressure (P) and volume (V) through the kinetic theory of gases. For a monoatomic ideal gas, P = (2/3)E per unit volume.

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