quiz5 - Exam Name_ MULTIPLE CHOICE. Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The maximum frequency the human ear can detect is about 20kHz. If you walk into a room in which there are two sources, one at 100kHz and one at 102kHz. Will you hear anything? A) Yes. B) No. C) Yes, but only in certain places in the room. 1) 2) A simple harmonic wave of amplitude 5.0cm, wavelength 70cm, and frequency 14Hz is propagating along a wire with linear density 40g/m. What's the wave energy per unit length of the wire? A) 0.4 J/m B) 1.0 J/m C) 4.0 J/m D) 10 J/m E) 40 J/m 2) 3) At a point 15m from a source of spherical sound waves, you measure a sound intensity of 750mW/m^2. How much further do you need to walk, directly away from the source, until the sound intensity is 270mW/m^2. A) 5m B) 10m C) 15m D) 20m 3) 4) A heavy cable is hanging vertically, its bottom end free. How will the speed of transverse waves near the top and the bottom of the cable compare? A) They will be the same.
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quiz5 - Exam Name_ MULTIPLE CHOICE. Choose the one...

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