What will be the average value of energy along one degree of freedom for an ideal gas in thermal equilibrium at a temperature $T$? ($k_{B}$ is Boltzmann constant)

  • A
    $\frac{1}{2} k_{B} T$
  • B
    $\frac{2}{3} k_{B} T$
  • C
    $\frac{3}{2} k_{B} T$
  • D
    $k_{B} T$

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