Fluid Mechanics
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the

Distance between the throat and the inlet is more
Throat diameter is more
Sudden expansion of flow in the downstream occurs
Length is shorter

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Fluid Mechanics
A differential pressure cell is used for

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

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