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Root Mean Square Speed

The speed of ...

Question

The speed of molecules at absolute zero temperature becomes

A

zero.

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B

infinity.

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C

less.

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D

more.

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Solution

The correct option is A zero.
$v_{r m s}^{2} = \frac{3}{2} k T$
$\Rightarrow v_{r m s} \propto \sqrt{T}$
At $T = 0$ , $v_{r m s} = 0$

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