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In physical sense, compressibility is the fractional change in volume of the fluid element per unit change in_____

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In physical sense, compressibility is the fractional change in volume of the fluid element per unit change in_____

(a) Mass

(b) Temperature

(c) Pressure

(d) Density

I got this question during an internship interview.

Origin of the question is Definition of Compressibility in chapter Compressible Flow – Preliminary Aspects of Aerodynamics

1 Answer

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Best answer
The correct option is (c) Pressure

The best I can explain: The compressibility is defined as the fractional change in the volume of the fluid element pet unit change in pressure. It is a negative quality since the volume decreases as pressure increases and vice versa.

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