A noise level of 100 decibel would correspond to :
just audible sound
ordinary conversation
sound from a noisy street
noise from a machine shop
Sonar makes use of the
infrasonic sound
ultrasound
ordinary sound
light
Audible frequency range is
20 Hz to 2 kHz
20 Hz to 20 kHz
20 Hz to 200 kHz
20 Hz to 200 Hz
The example of a stringed instrument is
tabla
flute
mouthorgan
violin
The speed of a wave in a medium is 760 m/s.If 3600 waves are passing through a point in the medium in 21 min, then their wavelength is
13.8 m
25.3 m
41.5 m
57.2 m
A sound wave travels at a speed of 330 m/s. If its wavelength is 1.5 cm, calculate the frequency of the sound wave.
22 kHz
30 kHz
10 kHz
35 kHz
Sound waves travel with a speed of 346 m/s in air. What is the wavelength of sound whose frequency is 692 Hz?
0.5 m
5 m
0.05 m
50 m
Which of the following statement best describes frequency?
the maximum disturbance caused by a wave
the number of complete vibrations per second
the distance between one crest of a wave and the next one
the distance travelled by a wave per second
If 15 waves are produced per second, what is the frequency?
20 Hz
30 Hz
15 Hz
1/15 Hz
A man standing 48 m away from a wall fires a gun. The echo is heard after 0.3 seconds. What is the speed of the sound?
320 m/s
400 m/s
300 m/s
340 m/s
