When the temperature of an ideal gas is increased by 600 K, the velocity of sound in the gas becomes times the initial velocity in it. The initial temperature of the gas is ____.
The frequency of a sound wave is n and its velocity is v. If the frequency is increased to ,the velocity of the wave is ____.
v
The speed of a wave in a certain medium is 960 m / s. If 3600 waves pass over a certain point of the medium in 1 minute, the wavelength is ____.
2 metres
4 metres
8 metres
16 metres
Speed of sound at constant temperature depends on ____.
pressure
density of gas
above both
None of the above
A man standing on a cliff claps his hand hears its echo after 1 s. If sound is reflected from another mountain and velocity of sound in air is
. Then the distance between the man and reflection point is ____.
680 m
340 m
85 m
170 m
What is the wave velocity, if the radar gives 54 waves per min and wavelength of the given wave is 10 m ____.
4 m / s
6 m / s
9 m / s
5 m /s
Sound velocity is maximum in ____.
The minimum distance of reflector surface from the source for listening the echo of sound is ____.
28 m
18 m
19 m
16.5 m
The type of waves that can be propagated through solid is ____.
transverse
longitudinal
Both A and B
None of the above
A man stands in front of a hillock and fires a gun. He hears an echo after
1.5 s. The distance of the hillock from the man is (velocity of sound in air is 330 m/s) ____.
220 m
247.5 m
268.5 m
292.5 m
Velocity of sound in air
I. Increases with temperature
II. Decreases with temperature
III. Increase with pressure
IV. Is independent of pressure
V. Is independent of temperature
Choose the correct answer.
Only I and II are true
Only I and III are true
Only II and III are true
Only I and IV are true
The speed of a wave in a medium is 760 m / s. If 3600 waves are passing through a point, in the medium in 2 minutes, then its wavelength is ____.
13.8 m
25.3 m
41.5 m
57.2 m
The frequency of a tuning fork is 384 per second and velocity of sound in air is 352 m /s. How far the sound has traversed while fork completes 36 vibrations?
3 m
13 m
23 m
33 m
The temperature at which the speed of sound in air becomes double of its value at is ____.
273 K
546 K
1092 K
0 K
If wavelength of a wave is . Then wave number is ____.
Velocity of sound measured in hydrogen and oxygen gas at a given temperature is in the ratio ____.
1 : 4
4 : 1
2 : 1
1 : 1
Find the frequency of minimum distance between compression & refraction of a wire. If the length of the wire is 1m & velocity of sound in air is
360 m / s ____.
The velocity of sound is vs. in air. If the density of air is increased to 4 times, then the new velocity of sound is ____.
It takes 2.0 seconds for a sound wave to travel between two fixed points when the day temperature is C. If the temperature rise to C the sound wave travels between the same fixed parts in ____.
1.9 s
2.0 s
2.1 s
2.2 s
If vm is the velocity of sound in moist air, vd is the velocity of sound in dry air, under identical conditions of pressure and temperature ____.
vm > vd
vm < vd
vm = vd
vm vd = 1