Fluid Mechanics
Uniform fluid flow occurs, when the derivative of the flow variables satisfy the following condition.

∂/∂t = constant
∂/∂t = 0
∂/∂t = constant
∂/∂s = 0

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Fluid Mechanics
A differential pressure cell is used for

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

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