An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the sending and receiving of the wave is 1.6s. What is the depth of the sea, if the velocity of sound in the seawater is 1400m/s?
1120m
560m
1400m
112m
An echo returned in 5sec. What is the distance of the reflecting surface from the source, given that the speed of sound is 340 m s−1?
1700m
68m
850m
170m
The wavelength of a sound wave in air is 2.40m at 20oC. Speed of sound in sea water = 1531m/s at 20oC. What is the wavelength of this sound wave in fresh water? (Hint: The frequency of sound wave is the same in both medium).
12.87m
637.92
C. 142.92
10.71m
Pick out the most correct from the following:
Velocity of sound in gases is highest and least in solids and the velocity in gases increases with temperature
Velocity of sound in solids is highest and least in gases and the velocity in gases decreases with temperature
Velocity of sound in gases is the highest and least in solids and the velocity in gases decrease with temperature
Velocity of sound in solids is the highest and least in gases and the velocity in gases increase with temperature
What is called the air pressure variation associated with shock waves produces a very sharp and loud sound?
Super sonic boon
Sonic boon
Ultra sonic boon
Infra sonic boon
Calculate the velocity of sound in Nitrogen. Density of Nitrogen at STP is 0.00125gm/cm3. The ratio of specific heats of Nitrogen is 1.4.
336.91m/s
336.91/s
3369.1m/s
3151cm/s
A bobber on a fishing line oscillates up and down two times per second as waves pass by. The waves have a wavelength of 10cm. What is the velocity of the wave?
5 cm/s
10 cm/s
20 cm/s
980 cm/s
If you strike a horizontal rod vertically from above, what can be said about the waves created in the rod?
The particles vibrate horizontally along the direction of the rod.
The particles vibrate vertically, perpendicular to the direction of the rod.
The particles vibrate in circles, perpendicular to the direction of the rod.
The particles travel along the rod from the point of impact to its end.
Calculate the Young’s modulus of lead. Density of Lead is 11350kg/m2 and the velocity of sound is 1210m/s.
1.66 x 1011Nm2
1.66 x 1010 Nm2
1.37 x 1010Nm2
1.37 x 107Nm2
What is the amplitude of a wave?
the distance the wave moves in one second
the distance the wave moves in one time period of the wave
the maximum distance moved by the medium particles on either side of the mean position
the distance equal to one wave length
