Fluid Mechanics
A differential pressure cell is used for

Measuring small pressure difference in liquids
Measuring the difference of the impact & the static pressure
Remote recording of pressure difference
Measuring small pressure difference in gases

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Fluid Mechanics
The continuity equation

Stipulates that Newton's second law of motion must be satisfied at every point in the fluid
None of these
Relates work and energy
Relates mass flow rate along a stream tube

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