Question 2 / 40:  Which of the following statements accurately describes Eulerian and Lagrangian mechanics or reference frames?
A  A neutrally buoyant weather balloon makes pressure measurements in an Eulerian reference frame.
B  An anemometer at the top of Mount Washington makes wind velocity measurements in an Eulerian
reference frame.
C  The fixed laboratory reference frame is a Lagrangian reference frame.
D  Neither Lagrangian nor Eulerian viewpoints can be exactly correct.
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Explanation:

In an Eulerian perspective, the reference frame is fixed in space. In a Lagrangian perspective, the reference frame moves along with the fluid.

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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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