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प्रश्न
Name the device used by doctors to listen to our heartbeats.
उत्तर
A stethoscope is a device used by doctors to listen to our heart beats.
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संबंधित प्रश्न
What name is given to the persistence of sound in a big hall or auditorium ?
What is reverberation ? What will happen if the reverberation time in a big hall is too long ?
How can reverberations in a big hall or auditorium be reduced ?
Consider the following sound waves marked A, B, C and D.
(a) Which two waves represent sounds of the same loudness but different pitch ?
(b) Which two waves represent sounds of the same frequency but different loudness ?
(c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies ?
(d) Which vibrating body/bodies could have generated the sound waves shown here ?
Explain by giving a scientific reason.
The roof of a movie theatre and a conference hall is curved.
Explain by giving a scientific reason.
The intensity of reverberation is higher in a closed and empty house.
Where and why are sound-absorbing materials used?
Why do we hear the sound produced by the humming bees while the sound of vibrations of the pendulum is not heard?
The distance of underwater objects can be deduced by the formula ______.
Why are the roots and walls of the auditorium covered with rough plaster?
