The speed of highly penetrating ultrasonic waves is:
lower than those of audible sound waves
higher than those of audible sound waves
much higher than those of audible sound waves
same as those of audible sound waves
The velocities of sound waves in four media P, Q, R and S are 18,000 km/h, 900 km/h, 0 km/h, and 1200 km/h respectively. Which medium could be a liquid substance?
P
Q
R
S
The ultrasound waves can penetrate into matter to a large extent because they have:
very high speed
very high frequency
very high quality
very high amplitude
Sound is a kind of
Work
Energy
Force
None
We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called :
Frequency
Timbre
Pitch
Loudness
The sound waves travel fastest:
In solids
In liquids
In gases
In vacuum
Which of the following modes is utilised in the production of sound by humans?
vibrating membranes
vibrating plates
vibrating strings
vibrating air columns
Noise pollution is harmful for
Human
Cat
Bird
All
Large amplitude of sound vibrations will produce:
Loud sound
Meak sound
Slow sound
Shreak
Voice of which of following is likely to have minimum frequency?
Baby girl
Baby boy
A man
A woman
