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Q.

A gaseous mixture contains 4 molecules with a velocity of 6 cm sec-1 ,5 molecules with a velocity of 2 cm sec-1 and 10 molecules with a velocity of 3 cm sec-1 what is the RMS velocity of the gas:

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a

2.5 cm sec−1

b

1.9 cm sec−1

c

3.6 cm sec−1

d

4.6 cm sec−1

answer is C.

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Detailed Solution

Urms=4×(6)2+5(2)2+10(3)219=3.6cm/sec.
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