(II) A space probe enters the thin atmosphere of a planet where the speed of sound is only about 42 m/s (a) What is the probe’s Mach number if its initial speed is 15000 km/h ? (b) What is the angle of the shock wave relative to the direction of motion?

(II) A space probe enters the thin atmosphere of a planet where the speed of sound is only about 42 m/s (a) What is the probe’s Mach number if its initial speed is 15000 km/h ? (b) What is the angle of the shock wave relative to the direction of motion?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 123P: A jet flying at an altitude of 8.50 km has a speed of Mach 2.00, where the speed of sound is...

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Concept explainers

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.

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