A tuning fork of 500 Hz is struck in a room with a speed of sound of 340 m/s. What is the distance between a point of rarefaction and the next compression point, in the resulting sound? 0.34 m 1.36 m 0.68 m 2.72 m
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0.34 m
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1.36 m
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0.68 m
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2.72 m
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- What are the first three harmonics of a note produced on a 34.7 cm long string if waves on this string have a speed of 276.0 m/s? 1st Harmonic Hz 2nd Harmonic Hz 3rd Harmonic HzThe speed of sound in room temperature (20°C) air is 343 m/s; in room temperature helium, it is 1010 m/s. The fundamental frequency of an open-closed tube is 315 Hz when the tube is filled with air. What is the fundamental frequency if the air is replaced with helium?What sound level in dB is produced by earphones that create an intensity of 1.50 ✕ 10−2 W/m2? _____ dB
- A convertible moves toward you and then passes you; all the while, its loudspeakers are producing a sound. The speed of the car is a constant 13.5 m/s, and the speed of sound is 344 m/s. What is the ratio of the frequency you hear while the car is approaching to the frequency you hear while the car is moving away?Two pianos each sound the same note simultaneously, but they are both out of tune. On a day when the speed of sound is 341 m/s, piano A produces a wavelength of 0.763 m, while piano B produces a wavelength of 0.780 m. How much time separates successive beats?The sound intensity level is reported in decibels. If one doubles the intensity of sound, by what does the perceived loudness, in decibels, change? (a) 2 dB (b) 3 dB (c) 5 dB (d) 10 dB (e) 20 dB
- A speed boat sounds its horn while moving towards the shore at 45.2 m/s . If people on the shore think the horn frequency is 89.0 Hz , what frequency did the speed boat pilot hear? 77.3 Hz 101 Hz 78.6 Hz 103 HzYou detect a sound intensity of 0.0000136 W/m2 coming from a speaker with a power of 0.217 W. How far away from the speaker are you standing?Doppler uses ultrasound to measure blood flow velocities. Assume that the device emits sound at a frequency of 3.2MHz, and that the speed of sound in human tissue is 1540 m/s What is the expected pulse rate if blood flows in the arteries of the large leg at a speed of 3) cm/s away from the source of the sound O 1260 Hz 126 Hz O 12.6 Hz O 12.6 kHz O 126 kHz O 1260 kHz 1.26MHz 0