Challenging questions about sound waves?

1.which of the folowing is taking place when sound waves r reflected from a surface along parallel lines


a.diffusion


b.absorption


c.refracting


d.focusing





2.an overtone thats a whole # multiple of the fundamental frequency of a string is called


a.harmonic


b.pitch


c.discordant sound


d.scale





3.sound waves cant travel thru


a.solid


b.liquid


c.elastic material


d.a vacuum





4.a wave w/ a period of 0.008 second has a frequency of


a.12.5Hz


b.80Hz


c.125Hz


d.800Hz





5.during the process of steel production the flaws in steel casting are detected by


a.infrasonic vibrations


b.ultrasonic vibrations


c.longitudinal vibrations


d.resonant vibrations





6.in a transverse wave that travels thru a medium the molecules of the medium vibrate:


a.in the direction in which the wabes travel


b.at right angles to the direction in which the waves travel


c.at twice the velocity of the molecules in a longitudinal wave


d.w/ smaller amplitudes than the molecules in a longitudinal wave

Challenging questions about sound waves?
C


A


D


C


B


?
Reply:c


a


d


c


d


b
Reply:1. C


2. A


3. B


4. C


5. D


6. A

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