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If the speed of sound is much ________ than that of the gas, the gas density will stay constant.

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+1 vote
in Fluid Mechanics by (118k points)
If the speed of sound is much ________ than that of the gas, the gas density will stay constant.

(a) Smaller

(b) Larger

(c) Equal to

(d) Non-existent

The question was asked during an interview for a job.

My query is from Flow through Nozzles topic in portion Flow Through Pipes of Fluid Mechanics

1 Answer

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by (362k points)
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Best answer
Correct answer is (b) Larger

Best explanation: This is because only with speed of sound Is larger, it’ll be able to compensate for the speed of gas. Under such situations, the gas density will be able to stay constant. If they are equal, density will get compressed.

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