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Exam 20: The Micromacro Connection

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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.) (The Boltzmann constant is 1.38 × 10-23 J/K.)

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