Fluid Mechanics
Velocity distribution for flow between two fixed parallel plates

Is zero at the plates and increases linearly to the midplane
None of these
Varies parabolically across the section
Is constant over the entire cross-section

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Fluid Mechanics
A differential pressure cell is used for

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

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