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

question 31

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 (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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Definitions:

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place, crucial for the respiratory process.

Inspiration

Inspiration refers to the process of being mentally stimulated to do or feel something, especially something creative or the intake of air into the lungs.

Expiration

The act of coming to an end or the cessation of validity, such as in the context of a deadline or a product's shelf life.

Bucc/o

A combining form in medical terminology that refers to the cheek.