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प्रश्न
Can we hear sounds of frequencies:
Less than 20 Hz
उत्तर
Less than 20Hz - we cannot hear the sound.
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संबंधित प्रश्न
Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.
In which medium sound travels fastest : air, water or steel?
Explain why, a ringing bell suspended in a vacuum chamber cannot be heard outside.
Sound travels in air :
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.
Compare approximately the speed of sound in air, water and steel.
Can sound propagate in solids and liquids?
What is the audible range of frequency?
When we hear a sound, does any part of our body vibrate? Name the part.
