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
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
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 average person can hear sound waves ranging in frequency from about 20 Hz to 20,000Hz . Determine the wavelengths at these limits.
0.059m, 58.8m
17m,1.7cm
6800m,6.8 × 106m
17m, 0.0017m
What is called the amount of sound energy passing each second through unit area?
Young’s modulus
Intensity of sound
Amplitude
Frequency
The velocity of sound in CO2 at 0o C is 262m/sec., Find the ratio of specific heats of CO2.
0.00013
0.013
0.13
1.33
Which of the following is not a characteristic of musical sound ?
Pitch
Wavelength
Quality
Loudness
Match the following and select the correct answer.
a) speed 1. ms-2
b) sound intensity 2. Dynes/ cm2
c) acceleration 3. Newton
d) young’s modulus 4. dB
e) force 5. m/s
a-5, b-2, c-3, d-4,e-5
a-3,b-4, c-1,d- 4,e-2
a-5,b-4, c-1, d-2, e-3
a-5, b-4, c-3, d- 2,e- 1
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
