Answer
$f = 1.8 \times 10^{-2}$
Work Step by Step
At T = 1000 K, Solve for f
$f = \frac{(3)(8.62 \times 10^{-5} eV/K)(1000 K)}{2(7.00 eV)}$
$f = 1.8 \times 10^{-2}$
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