B79 The viscous force on a sphere, of radius r, moving through a fluid with velocity v can be expressed as 6ryre, where is the coefficient of viscosity of the fluid. What is the limitation on the use of this expression? [L]

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B79 The viscous force on a sphere, of radius r,
moving through a fluid with velocity v can be
expressed as 6ryre, where is the coefficient
of viscosity of the fluid. What is the limitation
on the use of this expression?
[L]
Transcribed Image Text:B79 The viscous force on a sphere, of radius r, moving through a fluid with velocity v can be expressed as 6ryre, where is the coefficient of viscosity of the fluid. What is the limitation on the use of this expression? [L]
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