The drag co-efficient for a bacterium moving in water at... — Answer & Explanation | PrepBeePakistan

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HomeMCQsChemical Engineering

MEDIUMENGLISHChemical Engineering

The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s) ?

Correct answer: D

Explanation

The drag coefficient (Cd) for a small sphere at low Reynolds numbers is often approximated by the Stokes' Law relationship. The calculation leads to an order of magnitude close to 0.44.

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