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प्रश्न
Can we hear sounds of frequencies:
Less than 20 Hz
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उत्तर
Less than 20Hz - we cannot hear the sound.
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संबंधित प्रश्न
When we open a gas tap of a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?
Describe an experiment to show that sound cannot pass through vacuum.
A body vibrating with a time-period of `1/256` s produces a sound wave which travels in air with a velocity of 350 m/s. Calculate the wavelength.
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?
Give scientific reasons:
As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
What is the approximate value of the speed of sound in air at N.T.P.?
Explain the effect of density on the speed of sound.
Can we hear sounds of frequencies:
More than 20 KHZ
State three characteristics of the medium required for the propagation of sound.
