The frequency of a source is 20 kHz. The frequencies of sound wave produced by it in water and air will be
Same as that of source = 20 kHz
> 20 kHz
< 20 kHz
Depends upon velocity
The speed of sound through solids, liquids and gases are .................. , ................ and ................... respectively.
Which of the following information completes the given statement?
Slowest, faster and fastest
Average, fastest and slowest
Slowest, fastest and average
Fastest, slower and slowest
The amplitude of vibration and its frequency can change suddenly in a
Pitch
Musical sound
Noise
All of the these
Sound cannot travel in
vacuum.
solid.
liquid.
gas.
What is the loudness of Busy traffic?
10 dB
30 dB
70 dB
100 dB
Sound can travel through
Solid only
Solid, liquid and gas only
Gas only
Gas and vacuum only
Which part of ear does not vibrate while detecting sound?
Ear drum
Air in the ear canal
Ear bones in the middle ear
Nerve from ear to the brain
The pleasing sounds are called
Music.
Noise.
loudness.
None of these.
Unwanted sounds are called
Loudness.
The size of vocal chords of men is :
20 mm
19 mm
18 mm
1 cm
