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
Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.
Select the correct alternative :
The speed of sound in water is
A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why?
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a village
Fill in the blank and explain.
The velocity of sound in steel is ______ than the velocity of sound in water.
Why does sound travel faster on a rainy day than on a dry day?
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?
Sound travels faster in ______ and slower in ______.
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?
