Advertisements
Advertisements
Question
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
A wire of length 80 cm has a frequency of 256 Hz. Calculate the length of a similar wire under similar tension, which will have frequency 1024 Hz
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
What are mechanical waves?
Write the approximate value of the speed of sound in air.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
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.
(i) A man stands at a distance of 68 m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340 ms−1?
(ii) If the man had been standing at a distance of 12 m from the cliff would he have heard a clear echo?
