Acoustics Answers

A source of sound of frequency 600 Hz is placed inside water.The speed of sound in water is 1500m/s,and in air,it is 300m/s.The frequency of sound recorded by an observer who is standing in air is: a)200 Hz. b)120 Hz. c)3000 Hz. d)600 Hz.

]A wave has a frequency 66 Hz and a velocity of 330 m/s in a particular medium. What is its wavelength?

A bat emits an ultrasonic sound wave at 35 Hz and receives a reflected signal in the form of an echo 0.20s later. If the speed of sound in air is given to be 330 ms-1 , how far is the bat from the object?
33,45,106or1650m??

how a mosquito can able to produce high sound

1. Sand falls at the rate of 0.15kg/s on a conveyor belt moving horizontally at a constant speed of 2 m/s , calculate i) the extra force necessary to maintain this speed ii) the rate at which work is done by this force, iii) the change in kinetic energy per second of the sand on the belt. Account for the difference between answer to (ii) to (iii)

Two tuning forks of frequency 2.56Hz and 260Hz are sounded close to each other.what is the frequency of the beats predicted?

explain the variation in amplitude and frequency of the guitar

1. we can recognize persons speaking with the same loudness from their voice. how is this possible?
2.You can listen to your friend round a corner, but you can not watch him/her. Why?
3. A student says that the two terms speed and frequency of the wave refer to the same thing. What is your response?
4. Two people are listening to the same music at the same distance. They disagree on its loudness. Explain how this could happen?
5. Will two separate 50dB sounds together constitute a 100dB sound?

the distance travelled by wave is 140 m during which it completes 200 vibrations. If the fequency of vibration of the wave is 500Hz,find the velocity of the wave.

the frequency of a sound determines its?