Assume that a radioactive dust particle approximates asphere of density 2400 kg/m3. How long, in days, will ittake such a particle to settle to sea level from an altitude of12 km if the particle diameter is (a) 1 μm or (b) 20 μm?

Assume that a radioactive dust particle approximates asphere of density 2400 kg/m3. How long, in days, will ittake such a particle to settle to sea level from an altitude of12 km if the particle diameter is (a) 1 μm or (b) 20 μm?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.26P

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Question

Assume that a radioactive dust particle approximates a
sphere of density 2400 kg/m³. How long, in days, will it
take such a particle to settle to sea level from an altitude of
12 km if the particle diameter is (a) 1 μm or (b) 20 μm?

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