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Unformatted text preview: length of the rope, (b) the speed of the waves on the rope, and (c) the mass of the rope? (d) If the rope oscillates in a third-harmonic standing wave pattern, what will be the period of oscillation? 3. In the figure below, two loudspeakers, separated by a distance of 2.00 m, are in phase. Assume the amplitudes of the sound from the speakers are approximately the same at the position of a listener, who is 3.75 m directly in front of one of the speakers, as shown. (a) For what frequencies in the audible range (20 Hz to 20 kHz) does the listener hear a minimum signal? (b) For what frequencies is the signal a maximum? 4. A point source emits 30.0 W of sound isotropically. A small microphone intercepts the sound in an area of 0.750 cm 2 , 200 m from the source. Calculate (a) the sound intensity (in decibels) there and (b) the power intercepted....
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- Spring '08