11-9 Shock Waves and Sonic Boom

•Supersonic means traveling faster than the speed of sound…the speed is given as a Mach number•… x sos/sos.•A shock wave is a very large wave built by constructive interference.•The bow-wave of a boat would be an analogy for the shock wave caused by a jet.•The angle of the apex of the shock-wave can be found by the equation … q=vsound /vobject

12-10 Applications of Sound

• Sonar…SOund Navigation And Ranging• Ultrasound… sos in body 1,500 m/s …smallest

wavelengths are about 1.5 mm…the smaller the wavelengths of sound used in ultrasound or sonar, the smaller the objects that can be detected.

• Pulse-Echo Technique• http://www.layyous.com/ultasound/ultrasound

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Homework (add to Monday)

• P379 60 and 63