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Two molecules have velocities equal to +...

Two molecules have velocities equal to +5 cm/s and -5 cm/s. Their average and root mean square velocities repectively are

A

0 cm/s and 5 cm/s

B

zero and 0 cm/s

C

0 cm/s and `5sqrt2` cm/s

D

5 cm/s and 0 cm/s

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The correct Answer is:
A
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