Physics Physics Practice Problems Solutions Library

Beats Solutions Library

Access 11 Beats video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Beats learn videos.

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11 solutions

Beats

Q. An all-female guitar septet is getting ready to go on stage. The lead guitarist, Kira, who is always in tune, plucks her low E string, and the othe...

Solved • Apr 27, 2020

Beats

Q. A hammer in an out-of-tune piano hits two strings and produces beats of 6 Hz. One of the strings is tuned to 132 Hz. Randomized Variables fB = 6 Hz...

Solved • Apr 22, 2020

Beats

Q. When a tuning fork of frequency 565 Hz vibrates beside a piano string, beats are heard. The string is loosened slightly and the beats go away. What...

Solved • Oct 6, 2017

Beats

Q. In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide greater intensity. For example, the note at 151 Hz...

Solved • May 18, 2017

Beats

Q. An acoustic burglar alarm consists of a source emitting waves of frequency 28.50 kHz. An intruder is walking at an average speed of 0.9600 m/s dire...

Solved • Apr 11, 2017

Beats

Q. Two strings both vibrate at exactly 819 Hz. The tension in one of them is then increased slightly. As a result, six beats per second are heard when...

Solved • Apr 11, 2017

Beats

Q. Two organ pipes are played at one, both at their harmonic frequencies. If one pipe is closed at one end and the other is open at both ends, and bot...

Solved • Apr 4, 2017

Beats

Q. Sound at 50 kHz can be used by police to measure a car's speed in a speed trap. If a car is travel at a speed relative to the source of the sound, ...

Solved • Mar 28, 2017

Beats

Q. A speaker on the edge of a well emits a sound at 500 Hz when it's accidently knocked over and falls into the well. As the speaker is falling, sound...

Solved • Mar 24, 2017

Beats

Q. A speaker near you is emitting a sound at an unknown frequency. In order to discover the frequency, you use a tuning fork to emit a sound of 300 Hz...

Solved • Mar 23, 2017

Beats

Q. A train whistle produces a sine wave with a wavelength of 0.7841 m in air when the speed of sound is 345 m/s. As the train is approaching you from ...

Solved • Mar 23, 2017