General Physics, 2nd Edition
General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 22, Problem 47E

(a)

To determine

The ideal gas law can be written as Pρ=RTM .

(b)

To determine

The velocity of sound in an ideal gas is γRTM .

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Rasim and Zhihan are experimenting to determine the speed of sound in m/s in air at 0°C. Assuming air to be made up of diatomic molecules with a molecular mass of 29 g/mol, what is the correct value they should expect for the speed of sound in m/s?
Compute the molecular mass M of a gas for which y = 1.40 and in which the speed of sound is 1260 m/s at precisely 0°C.
PROBLEMS 1. Consider a scenario in which supersonic flow is compressed and turned by 18° through an oblique shock. Consider the gas to be calorically perfect Air with upstream properties as follows: M, = 7, P, = 7.5 kPa, T1 = 225 K. Find the following: MI 6=180 (a) shock wave angle, ß. (you can either use the analytical solution from the notes or numerically find the root, whichever method you prefer). (b) downstream Mach number, M3. (c) downstream static pressure, P3. (d) downstream static temperature, T3. (e) total pressure ratio, Po.3 / Po,1- (f) entropy change, (s3-S). (g) use the VT Oblique Shock Calculator Applet to verify your results for this problem.
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