Rhinoceroses communicate using this range of sound:
Ultrasonic
Supersonic
Infrasonic
None of these.
A bat can hear sound at frequencies upto 120 kHz.Determine the wavelength of sound in air at this frequency.Take the speed of sound in air as 344 m/s.
2.9 x 10-3 m
4.5 x 10-3 m
2.5 x 10-3 m
1.8 x 10-3 m
At what rate does sound propogate through a medium?
Infinite speed
Variable speed
Finite speed
None of the above options are correct
Light when compared to sound is:
Slower
Faster
Of the same speed
Having a speed comparable to the medium it propagates through
A longitudinal wave travels from east to west in air.In which direction do the particles of air move?
East to west
West to east
North to south
South to north
The outer ear is called:
Pinna
Hummer
Cochlea
Anvil
Delhi Radio Station transmits musical programmes at 219 m wavelength and 1300 Hz frequency. Calculate the velocity of radio waves.
2.847 x 10-5 m/s
3.148 x 105 m/s
2.847 x 105 m/s
3.84 x 10-5 m/s
For hearing distinct echoes, the minimum distance from the reflecting surface must be:
34.4 m
17.2 m
36.02 m
18.1 m
How does the speed of sound change as temperature increases?
Increases
Decreases
Does not change
Unpredictable
The interpretation of the frequency of an emitted sound by the brain is referred to as:
Frequency
Pitch
Amplitude
Radiation
