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An assembly of smoke particles in air at NTP is under consideration. If the mass of each particle is $5 x l 0^{- 17} kg$ , then the rms speed is
(Given: k = 1.38 ${×19}^{- 23} {JK}^{- 1}$ )

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1.5 cm s-1

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1.5 ms-1

1.5 km s-1

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detailed solution

Correct option is A

12mC2 = 32kT, C = 3kTm = 3×1.38×10-23×2735×10-17 = 15 × 10-3 ms-1 = 1.5 cms-1

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An assembly of smoke particles in air at NTP is under consideration. If the mass of each particle is 5 x l0-17 kg, then the rms speed is(Given: k = 1.38 ×19-23 JK-1)

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

An assembly of smoke particles in air at NTP is under consideration. If the mass of each particle is $5 x l 0^{- 17} kg$ , then the rms speed is
(Given: k = 1.38 ${×19}^{- 23} {JK}^{- 1}$ )