To determine her own speed, a skydiver carries a loud buzzer that emits a steady tone at 1820 Hz. A friend at the landing site on the ground directly below her listens to the amplified sound he receives from the buzzer. Assume that the air is calm and that the speed of sound is 343 m/s, independent of altitude (not necessarily true, but a lot easier to deal with). While the skydiver is falling at terminal speed, her friend on the ground receives waves with a frequency of 2150 Hz. (a) What is the skydiver's speed of descent? (b) Suppose the skydiver is also carrying sound-receiving equipment that is sensitive enough to detect waves reflected from the ground. What frequency does she receive?

To determine her own speed, a skydiver carries a loud buzzer that emits a steady tone at 1820 Hz. A friend at the landing site on the ground directly below her listens to the amplified sound he receives from the buzzer. Assume that the air is calm and that the speed of sound is 343 m/s, independent of altitude (not necessarily true, but a lot easier to deal with). While the skydiver is falling at terminal speed, her friend on the ground receives waves with a frequency of 2150 Hz. (a) What is the skydiver's speed of descent? (b) Suppose the skydiver is also carrying sound-receiving equipment that is sensitive enough to detect waves reflected from the ground. What frequency does she receive?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Sound Waves

Section: Chapter Questions

Problem 17.61AP: To measure her speed, a skydiver carries a buzzer emitting a steady tone at 1 800 Hz. A friend on...

See similar textbooks

Similar questions

To measure her speed, a skydiver carries a buzzer emitting a steady tone at 1 800 Hz. A friend on the ground at the landing site directly below listens to the amplified sound he receives. Assume the air is calm and the speed of sound is independent of altitude. While the skydiver is falling at terminal speed, her friend on the ground receives waves of frequency 2 150 Hz. (a) What is the skydivers speed of descent? (b) What If? Suppose the skydiver can hear the sound of the buzzer reflected from the ground. What frequency does she receive?
If you shout across a canyon and hear the echo 0.80 s later, how wide is the canyon? Use the speed of sound as 340 m/s.
The observer sees a plane vertically above him and hears it after 1.5 seconds, while the plane enclosed an angle of 35° with the vertical axis. At what speed and at what hight does the plane fly? (The solutions are 1500 km/h; 890 m)
A person stands at a point 380 m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? Assume the speed of sound is 344 m/s
A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
A plane is flying at Mach 1.2, and an observer on the ground hears the sonic boom 15.00 seconds after the plane is directly overhead. What is the altitude of the plane? Assume the speed of sound is vw = 343.00 m/s.
During a thunderstorm, 3.0 s elapses between observing a lightning flash and hearing the resulting thunder. Approximately how far away in kilometers and miles was the lightning flash? (Assume the speed of sound is 344 m/s.) km mi
A group of hikers hears an echo 3.40 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 341 m/s.)
A woman sees a supersonic plane directly overhead and then hears a sonic boom 4.8 s later. If the plane's altitude is 1.95 ✕ 103 m, what is the Mach number of the plane? Assume the speed of sound is 331 m/s.
Unless otherwise indicated, for this problem , assume that the speed of sound through human tissues is 1540 m/s. The time delay between transmission and the arrival of the reflected wave of a signal using ultrasound traveling through a piece of fat tissue was 0.13 ms. At what depth did this reflection occur?
A bat emits ultrasonic pulses and uses them to navigate and to locate flying insects. If these pulses are sent at a rate of 2 per second, what is the maximum distance a reflecting object can be if the reflected pulse is to be received by the bat before the next pulse is emitted? (The speed of sound in air is 344 m/s.)
Unless otherwise indicated, for this problem , assume that the speed of sound through human tissues is 1540 m/s. What is the sound intensity level in decibels of ultrasound of intensity 105 W/m2 , used to pulverize tissue during surgery?