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# Repeat Prob. 9-20 for helium gas.PROBLEM: Air expands ISBN: 9780071284219 39

## Solution for problem 63P Chapter 2

Fluid Mechanics | 2nd Edition

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Problem 63P

Problem 63P

Repeat Prob. 9-20 for helium gas.

PROBLEM: Air expands isentropically from 1.5 MPa and 60°C to 0.4 MPa. Calculate the ratio of the initial to final speed of sound.

Step-by-Step Solution:

Solution to 63P

Step 1

We need to find the ratio of initial speed to final speed of sound if helium expands from 1.5MPa at 600C to 0.4MPa isentropically.

To calculate we need to use the equation for isentropic flow applied to ideal gases.  P=pressure

V=volume

𝝲=specific heat of the gas

T =temperature

Step 2 of 3

Step 3 of 3

##### ISBN: 9780071284219

Fluid Mechanics was written by and is associated to the ISBN: 9780071284219. Since the solution to 63P from 2 chapter was answered, more than 317 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 63P from chapter: 2 was answered by , our top Engineering and Tech solution expert on 07/03/17, 04:51AM. This full solution covers the following key subjects: mpa, isentropically, expands, final, gas. This expansive textbook survival guide covers 15 chapters, and 1547 solutions. This textbook survival guide was created for the textbook: Fluid Mechanics, edition: 2. The answer to “Repeat Prob. 9-20 for helium gas.PROBLEM: Air expands isentropically from 1.5 MPa and 60°C to 0.4 MPa. Calculate the ratio of the initial to final speed of sound.” is broken down into a number of easy to follow steps, and 28 words.

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Repeat Prob. 9-20 for helium gas.PROBLEM: Air expands