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Acoustics
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??
33,45,106or1650m??
Acoustics
Does reflected sound waves have same amplitude and frequency when it reaches the receiver?
Acoustics
how a mosquito can able to produce high sound
Acoustics
A police car is racing to the scene of an accident. A student waiting at a bus stop notes that the pitch of the siren is 1100 Hz as the car approaches her ad then shifts to 900 Hz as the car continues past her toward the accident. Using her knowledge of the Doppler effect, what did she determine the speed of the police car was?
Acoustics
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)
Acoustics
Two tuning forks of frequency 2.56Hz and 260Hz are sounded close to each other.what is the frequency of the beats predicted?
Acoustics
Why two tin cans with a string stretched between them could be better way to communicate than merely shouting through the air?
Acoustics
explain the variation in amplitude and frequency of the guitar
Acoustics
an ideal gas is initially at temperature T & volume V.If temperature is increased by delta T ,pressure remaining unaltered,then delta V/V*delta T varies as
a]1/T B]T*T C]T
a]1/T B]T*T C]T
Acoustics
IF TRANSVERSE WAVES CANNOT PASS THROUGH LIQUIDS THEN HOW COME WAVES PRODUCED IN WATER IS TRANSVERSE WAVE
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