Question

(a) Explain how a vibrating tuning fork produces sound waves in the air. Describe the nature
of these waves.
(b) A wave of frequency 500 Hz travels between two points P and with a velocity of
300 m/s. How many wavelengths are there in PQ if the length of PQ is 600 m2
(c) In the figure, if a wave in a string, velocity of sound produced is 10 m/s. From the diagram
Displacement in cm
2
3
6 m Distance in cms
(i) find the wavelength,
(ii) find amplitude of the wave,
(iii) calculate the frequency of the wave.​

Answer 1

Answer:

(a) Sound waves are produced by vibrating objects. When the tuning fork is hit with a rubber hammer, the tines begin to vibrate. ... The back and forth vibration of the tines produce disturbances of surrounding air molecules.

(b) Wavelength is defined by the equation,

λ

=

v

f

v

is the velocity of the waves in meters per second

f

is the frequency of the waves in hertz

And so,

λ

=

300

m/s

500

Hz

=

0.6

m

Since the length of

P

Q

is

600

m

, then there are:

600

m

0.6

m

/

λ

=

1000

λ

There are

1000

wavelengths in

P

Q

.

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mujhe (c) part ka answer nahi pata

Answer 2

Answer:

calculate the frequency of the wave.