Question

a woman is traveling in a car at a speed of 25m/s . she is moving away from a source producing a sound of 512Hz .<br /> (a) calculate the frequency of sound heard by her ( speed of sound in air= 340m/s) .<br /> (b) Name the phenomenon that explains this variation in frequency .<br /> (c) Draw the second harmonic of an open pipe (both ends open) . mark node and an antinode in the figure.
plz plz give anwser fast​

Answer 1

Explanation:

given ::-

wave speed = 25m/s.

frequency= 512 HZ.

Theirfore,, wave length = wave speed ÷frequency

= 25÷512= 0.048828125.

now wave length = 0.04 m(approx)

now frequency = wave speed ÷ wave length

= 25m/s ÷ 0.04= 625 HZ..

Theirfore,, The requried frequency = 625 HZ.

Hope it helps u..