# Dimensional Analysis and Dynamic Similtude

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Determine the specific gravity of spherical particles, D=(1/200 in), which drop through air at 33degrees F at a speed U of 0.3 ft/s. The drag force on a small sphere in laminar motion is given by 3(pi)(mu)DU.

This problem is in Fluid Mechanics by Victor Streeter.

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##### Solution Summary

This solution discusses in 129 words how Newton's law can be applied to this question in finding mass, volume, and density to find specific gravity.

##### Solution Preview

This boils down to our most favorite of Newton's Laws. Force equals mass times acceleration (F=ma). The force is given by 3(pi)(mu)DU. Where mu is the dynamic viscosity of air at ...

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