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Dust Particles Are Pulverized Rock, Which Has Density 2500 Kg/m3

Question 27

Multiple Choice

Dust particles are pulverized rock, which has density 2500 kg/m3. They are approximately spheres 20 μm in diameter. Treating dust as an ideal gas, what is the root-mean-square speed (thermal speed) of a dust particle at Dust particles are pulverized rock, which has density 2500 kg/m<sup>3</sup>. They are approximately spheres 20 μm in diameter. Treating dust as an ideal gas, what is the root-mean-square speed (thermal speed) of a dust particle at (The Boltzmann constant is 1.38 × 10<sup>-23</sup> J/K.) A) 5.2 × 10<sup>-5</sup><sub> m/s</sub> B) 1.7 × 10<sup>-5</sup><sub> m/s</sub> C) 3.0 × 10<sup>-5</sup><sub> m/s</sub> D) 7.3 × 10<sup>-5</sup><sub> m/</sub><sub>s</sub> (The Boltzmann constant is 1.38 × 10-23 J/K.)


A) 5.2 × 10-5 m/s
B) 1.7 × 10-5 m/s
C) 3.0 × 10-5 m/s
D) 7.3 × 10-5 m/s

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