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When is air assumed to be incompressible?

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+1 vote
in Fluid Mechanics by (118k points)
When is air assumed to be incompressible?

(a) At low speed

(b) At high speed

(c) Independent of its speed

(d) None of the mentioned

I got this question in semester exam.

This intriguing question comes from Important  Cases of Potential Flow topic in section Kinematics of Flow and Ideal Flow of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Right option is (a) At low speed

The best I can explain: Air is assumed to be incompressible at low speed.

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