Question 18 / 40:  Which of the following best describes the physical meaning of the Froude number?
A  Ratio of boundary layer thickness to solid object length scale
B  Ratio of a characteristic velocity to a gravitationally induced velocity
C  Ratio of lowest and highest mass densities in the flow field
D  Ratio of a characteristic length times a characteristic velocity to the acceleration of gravity
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Explanation:

See page 89 of the resource for subunit 5.1. The Froude number appears in many problems with free surfaces (e.g. nautical mechanics, ocean waves, aerodynamics).

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Fluid Mechanics ME201

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Attribution:  Stephanie Redfern and Tuan Dinh. Fluid Mechanics. The Saylor Academy 2014, http://www.saylor.org/courses/me201/
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