Advertisements
Advertisements
प्रश्न
A sound wave travels at a speed of 339 m s−1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
Advertisements
उत्तर
Speed of sound wave, v = 339 m s−1
Wavelength of sound wave, `lambda` = 1.5 cm = 0.015 m
Speed of sound wave = Wavelength × Frequency
`"v"=lambdaxxupsilon`
∴ `upsilon`
= `"v"/lambda`
= `339/0.015`
= 22600 Hz
The frequency range of audible sound for humans lies between 20 Hz to 20,000 Hz. Since the frequency of the given sound is more than 20,000 Hz, it is not audible.
APPEARS IN
संबंधित प्रश्न
A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s−2 and speed of sound = 340 m s−1.
What name is given to those aircrafts which fly at speeds greater than the speed of sound?
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
The drawing shows a ship 800 m from a cliff. A gun is fixed on the ship. After 5 seconds the people at the front of the ship hear the sound of the gun again.
(a) What is the name of this effect ?
(b) What happens to the sound at the cliff ?
(c) How far does the sound travel in 5 seconds ?
(d) Calculate the speed of sound.
Nita heard the sound of lightning after 4 seconds of seeing it. What was the distance of the lightning from her?
(The velocity of sound in air is 340 m/s.)
Why does the flash of lighting reach earlier than the sound of thunder?
Velocity of sound in a gaseous medium is 330 ms–1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is
An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the transmission and reception of the wave is 1.6 seconds. What is the depth of the sea, if the velocity of sound in the seawater is 1400 ms–1?
The velocity of sound by a tuning fork frequency of 480 Hz is 340 ms Its wavelength is ______.
Numerical problems:
A Sound wave travels at a speed of 344 ms-1. If the wavelength is 1.5 cm, what is the frequency of the Wave? Will it be audible?
