ve is moving m air with a velocity of 340 m/s. Calculate the wavelength
Owl Awave is moving m air with a
its frequency is :
w) 512 vibrations per second
(b)
100 Hz.
[Ans: (a) 0.66 m (b) 3.4 m)
A sonar station picks up a return signal after 3 seconds. How far away is the
biect? [Speed of sound in water = 1440 m/s
Ans: 2160 m]
stone is dropped from the top of a tower 500 m high into a pond of water
at the base of tower. When is the splash heard at the top ? Given g = 10 ms
and speed of sound = 340 ms!
Ans: 11.4751
THint: Time taken by stone to reach at pond, t = ?, Use s = ut + 12g7.500 =
1, 1012; so, t = 100 or t = 10 sec.]
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