When sound waves travel from air to water, which of the following remains constant?
Velocity
Frequency
Wavelength
All the above
A stone is dropped in a well which is 19.6 m deep. Echo sound is heard after 2.06 s (after dropping) then the velocity of sound is ____.
332.6 m / s
326.7 m / s
300.4 m / s
290.5 m / s
Velocity of sound is maximum in ____.
air
water
vacuum
steel
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 ____.
90 Hz
180 Hz
360 Hz
720 Hz
If the density of oxygen is 16 times that of hydrogen, what is the ratio of their corresponding velocities of sound waves?
1 : 4
4 : 1
16 : 1
1 : 16
At which temperature the speed of sound in hydrogen is same as that of speed of sound in oxygen at 100oC ____.
– 148 oC
– 212.5 oC
– 317.5 oC
– 249.7 oC
A tuning fork produces waves in a medium. If the temperature of the medium changes, then which of the following will change?
Amplitude
Frequency
Wavelength
Time-period
The wave length of light in visible part and for sound are related as ____.
None of the above
Which of the following is different from others?
Velocity
Wavelength
Frequency
Amplitude
The phase difference between two points separated by 1m in a wave of frequency 120 Hz is . The wave velocity is ____.
180 m/s
240 m/s
480 m/s
720 m/s
The echo of a gun shot is heard 8 s. after the gun is fired. How far from him is the surface that reflects the sound (velocity of sound in air = 350 m/s) ____.
1400 m
2800 m
700 m
350 m
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 ____.
his watch is set 3 s faster
his watch is set 3 s slower
his watch is set correctly
None of the above
Velocity of sound in air is ____.
faster in dry air than in moist air
directly proportional to pressure
directly proportional to temperature
independent of pressure of air
Two monatomic ideal gases 1 and 2 of molecular masses m1 and m2 respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas 1 to that in gas 2 is given by ____.
A man is standing between two parallel cliffs and fires a gun. If he hears first and second echoes after 1.5 s and 3.5 s respectively, the distance between the cliffs is (Velocity of sound in air = 340 m / s) ____.
1190 m
850 m
595 m
510 m