COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 13, Problem 7QAP
To determine
Explain if a tree falls in the forest and no humans are there to hear it, was any sound produced or not.
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COLLEGE PHYSICS
Ch. 13 - Prob. 1QAPCh. 13 - Prob. 2QAPCh. 13 - Prob. 3QAPCh. 13 - Prob. 4QAPCh. 13 - Prob. 5QAPCh. 13 - Prob. 6QAPCh. 13 - Prob. 7QAPCh. 13 - Prob. 8QAPCh. 13 - Prob. 9QAPCh. 13 - Prob. 10QAP
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- Show that the speed of sound in 20.0°C air is 343 m/s, as claimed in the text.arrow_forwardAn interstate highway has been built through a neighborhood in a city. In the afternoon, the sound level in an apartment in the neighborhood is 80.0 dB as 100 cars pass outside the window every minute. Late at night, the traffic flow is only five cars per minute. What is the average late-night sound level?arrow_forwardA piano tuner uses a 512-Hz tuning fork to tune a piano. He strikes the fork and hits a key on the piano and hears a beat frequency of 5 Hz. He tightens the string of the piano, and repeats the procedure. Once again he hears a beat frequency of 5 Hz. What happened?arrow_forward
- The area of a typical eardrum is about 5.0 105 m2. Calculate the sound power (the energy per second) incident on an eardrum at (a) the threshold of hearing and (b) the threshold of pain.arrow_forwardWere an astronaut on the Moon to drop a hammer, would there be sound? Explain. (Follow-up: How do astronauts communicate with one another and with mission control?)arrow_forwardCheck Your Understanding Describe a situation in your life when you might rely on the Doppler shift to help you either while driving a car or walking near traffic.arrow_forward
- What is the sound level of a sound wave with intensity 6.40 105 W/m2?arrow_forwardDoes a sound wave move faster in seawater or fresh water, if both the sea water and fresh water are at the same temperature and the sound wave moves near the surface? (w1000kgm3,s1030kgm3,Bw=2.15109Pa,Bs=2.34109Pa)arrow_forwardHow can an object move with respect to an observer so that the sound from it is not shifted in frequency?arrow_forward
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