10. Some cameras determinethe distance to the subject bysending out a sound wave andmeasuring the time needed forthe echo to return to thecamera. a) Draw a sketch of thescenario and b) Determine howlong would it take (to the nearestthousandth of a second) for thesound wave to return to thecamera if the subject were 5 maway given the speed of soundwas 340 m/s.Your answer

Answered: Image /qna-images/answer/69f6c7dc-17bf-4d4d-9cde-dff024069acf.jpg

Answered: 10. Some cameras determine the distance…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter16: Waves

Section: Chapter Questions

Problem 43P: (a) Seismographs measure the arrival times of earthquakes with a precision of 0.100 s. To get the...

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Similar questions

(a) Seismographs measure the arrival times of earthquakes with a precision of 0.100 s. To get the distance to the epicenter of the quake, geologists compare the arrival times of S- and P-waves, which travel at different speeds. If S- and P-waves travel at 4.00 and 7.20 km/s, respectively, in the region considered, how precisely can the distance to the source of the earthquake be determined? (b) Seismic waves from underground detonations of nuclear bombs can be used to locate the test site and detect violations of test bans. Discuss whether your answer to (a) implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves.)
What is the intensity in watts per meter squared of 85.0dB sound?
. A person stands directly in front of Iwo speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 7 in from one of the speakers and 7.2 in from the other. What is the frequency of the tone being emitted?
Dolphins make sounds in air and water. What is the ratio of the wavelength at a sound in air to its wavelength in seawater? Assume air temperature is 20.0°C.
(a) Ear trumpets were never very common, but they did aid people with hearing losses by gathering sound over a large area and concentrating it on the smaller area of the eardrum. What decibel increase does an ear trumpet produce it its sound gathering area is 900 cm2 and the area of the eardrum is 0.500 cm2, but the trumpet only has an eficiency of 5.00% in transmitting the sound to the eardrum? (b) Comment on the usefulness of the decibel increase found in part (a).
Check 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.
A Girl Scout is taking a 10.00-km hike to earn a merit badge. While on the hike, she sees a cliff some distance away. She wishes to estimate the time required to walk to the cliff. She knows that the speed of sound is approximately 343 meters per second. She yells and finds that the echo returns after approximately 2.00 seconds. If she can hike 1.00 km in 10 minutes, how long would it take her to reach the cliff?
Check Your Understanding Describe how amplitude is related to the loudness of a sound.
Check Your Understanding Describe how noise-canceling headphones differ from standard headphones used to block outside sounds.
What frequency is received by a mouse just before being dispatched by a hawk flying at it at 25.0 m/s and emitting a screech of frequency 3500 Hz? Take the Speed of sound to be 331 m/s.
Check Your Understanding You observe two musical instruments that you cannot identify. One plays high-pitched sounds and the other plays low-pitched sounds. How could you determine which is which without hearing either of them play?
A microphone receiving a pure sound tone feeds an oscilloscope, producing a wave on its screen. If the sound intensity is originally 2.00105W/m2 , but is turned up until the amplitude increases by 30.0% , what is the new intensity?

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