Advertisements
Advertisements
Question
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
Solution
We have to find the velocity of the sound wave.
Given: Frequency f = 2,000 Hz
Wavelength λ = 0.65 m
We know the relation between velocity, frequency, and wavelength ν = f × λ,
where ν is the velocity, F the frequency, and λ the wavelength.
So,
ν = (2000) × (0.65) m/s
= 1300 m/s
Therefore, velocity of sound is 1300 m/s.
APPEARS IN
RELATED QUESTIONS
What is the time-period of a tuning fork whose frequency is 200 Hz?
A cricket ball is seen to hit the bat first and the sound of hitting is heard a little later. Why?
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?
The maximum speed of vibrations which produce audible sound will be in :
Hydrogen gas is filled in two identical bottles, A and B, at the same temperature. The mass of hydrogen in the two bottles is 12 gm and 48 gm respectively. In which bottle will sound travel faster? How many times be as fast as the other?
Air temperature in the Rajasthan desert can reach 46°C. What is the velocity of sound in air at that temperature? (V0= 331 ms–1)
The thunder of cloud is heard 9.8 seconds later than the flash of lightning. If the speed of sound in air is 330 ms–1, what will be the height of the cloud?
The velocity of sound by a tuning fork frequency of 480 Hz is 340 ms Its wavelength is ______.
Assertion: The speed of sound in air is less than the speed of sound in solid.
Reason: If we increase the temperature of medium, the speed of sound increases in any medium.
Numerical problems:
Two persons are at opposite ends of a steel rod. One strikes the end of the rod with a stone. Find the ratio of time taken by the sound wave in the air and in steel to reach the second person. (Sound of speed in steel = 5960 ms-1, Sound of speed in air = 344 ms-1).
