Physics · Heat transfer: conduction, convection and radiation
Which one of the following will happen if all the dust particles of the earth fl
Which one of the following will happen if all the dust particles of the earth fly away from the earth's atmosphere?
- A. Thinning of earth's atmosphere
- B. The speed of sound will decrease
- C. The earth will become dark
- D. All of the above
Step-by-step solution
Dust particles contribute to the total mass of the atmosphere. When they fly away, the mass decreases, effectively thinning the atmosphere. The speed of sound depends primarily on gas properties; removing dust slightly increases it, not decreases. Dust scattering contributes to sky brightness, but its removal would not make the earth dark—direct sunlight would increase. Hence, only option A is correct.
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