The frequency of a rod is 200 Hz. If the velocity of sound in air is 340 ms–1, the wavelength of the sound produced is :

(1) 1.7 cm

(2) 6.8 cm

(3) 1.7 m

(4) 6.8 m

Concept Questions :-

Speed of sound
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A stone is dropped into a lake from a tower 500 metre high. The sound of the splash will be heard by the man approximately after 

[Given : Speed of sound = 340 m/s ]

(1) 11.5 seconds

(2) 21 seconds

(3) 10 seconds

(4) 14 seconds

Concept Questions :-

Speed of sound
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When sound waves travel from air to water, which of the following remains constant 

(1) Velocity

(2) Frequency

(3) Wavelength

(4) All the above

Concept Questions :-

Speed of sound
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At what temperature velocity of sound is double than that of at 0°C 

(1) 819 K

(2) 819°C

(3) 600°C

(4) 600 K

Concept Questions :-

Speed of sound
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If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 1m, then the frequency of sound is 

(1) 90 Hz

(2) 180 Hz

(3) 360 Hz

(4) 720 Hz

Concept Questions :-

Speed of sound
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If the density of oxygen is 16 times that of hydrogen, what will be the ratio of their corresponding velocities of sound waves :

(1) 1 : 4

(2) 4 : 1

(3) 16 : 1

(4) 1 : 16

Concept Questions :-

Speed of sound
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At which temperature the speed of sound in hydrogen will be the same as that of the speed of sound in oxygen at 100°C :

(1) – 148°C

(2) – 212.5°C

(3) – 317.5°C

(4) – 249.7°C

Concept Questions :-

Speed of sound
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The phase difference between two points separated by 1m in a wave of frequency 120 Hz is 90°. The wave velocity is :

(1) 180 m/s

(2) 240 m/s

(3) 480 m/s

(4) 720 m/s

Concept Questions :-

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The echo of a gunshot is heard 8 sec. after the gun is fired. How far from him is the surface that reflects the sound? (velocity of sound in air = 350 m/s) :

(1) 1400 m

(2) 2800 m

(3) 700 m

(4) 350 m

Concept Questions :-

Speed of sound
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A man sets his watch by the sound of a siren placed at a distance 1 km away. If the velocity of sound is 330 m/s

(1) His watch is set 3 sec. faster

(2) His watch is set 3 sec. slower

(3) His watch is set correctly

(4) None of the above

Concept Questions :-

Speed of sound
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