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Q.

Four particles have speed 2,3,4 and 5 cm,/s respectively Their rms speed is:

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a

3.5cm/s

b

(27/2) cm/s

c

54 cm/s

d

54 /2cm/s

answer is D.

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Detailed Solution

Urms=U12+U22+U32+U424=544=542
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