Advertisements
Advertisements
Questions
A sound wavelength of 0.332 m has a time period of 10−3 s. If the time period is decreased to 10−4 s, calculate the wavelength and frequency of the new wave.
What could be done to stop the violent vibrations?
Advertisements
Solution
Wavelength = λ = 0.332 m
Time period = T = 10−3 s
Frequency = `1/"T"=1/10^-3` = 103 Hz.
Now the time period is decreased and is now 10−4 s.
∴ New frequency = `1/10^4` = 10−4 Hz,
Speed of sound, V = f × λ = 103 × 0.332
= 332 m/s
Since speed remains the same
∴ New wavelength, λ = `"V"/"f"=332/10^4` = 0.0332 m.
RELATED QUESTIONS
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
Write the approximate value of the speed of sound in water.
What is meant by echo depth sounding?
What do you understand by the ‘Echolocation system of Dolphins’?
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
A radio signal, sent towards the surface of the moon, is received in 2.5 seconds. If the speed of the radio waves is 3 × 108 ms−1, find the distance of the moon from the earth.
Match the following:
| 1. | Stethoscope | a. | Repeated reflections |
| 2. | Echogram | b. | Multiple reflections |
| 3. | SONAR | c. | Ultrasonic waves |
| 4. | Reverberation | d. | Speed of underwater objects |
