Write the kinetic gas equation and express it as `P = (2)/(3) E`, where E is the kinetic energy per unit volume.

Explanation

For one mole of ideal gas the kinetic gas equation is
`PV=(1)/(3)m u^(2)=(1)/(2)xx(2)/(3)m u^(2)=(2)/(3)xx(1)/(2)m u^(2)`
or `P=(2)/(3)((1)/(2)(m u^(2))/(V))=(2)/(3)E`