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प्रश्न
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
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उत्तर
It is more convenient to put the ear to the track to hear a train approaching from far away because sound travels faster in solids than in air because the speed of sound is directly proportional to the density of the material medium. In this case, the density of railway track is higher than air. Hence, sound waves travel faster through the railway track.
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संबंधित प्रश्न
Which of the following is the speed of sound in copper and which in aluminium?
(a) 5100 m/s
(b) 1500 m/s
(c) 3750 m/s
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
Sunil is standing between two walls. The wall closest to him is at a distance of 660 m. If he shouts, he hears the first echo after 4 s and another after another 2 seconds.
- What is the velocity of sound in air?
- What is the distance between the two walls?
Write the formula for speed of sound in a gas using Laplace correction.
The velocity of sound in solid is ______ than the velocity of sound in air.
The velocity of sound in air at a particular temperature is 330 ms–1. What will be its value when temperature is doubled and the pressure is halved?
A strong sound signal is sent from a ship towards the bottom of the sea. It is received back after 1s. What is the depth of sea given that the speed of sound in water 1450 ms–1?
Sound travels faster in ______ and slower in ______.
Assertion: The speed of sound in air is less than the speed of sound in solid.
Reason: If we increase the temperature of medium, the speed of sound increases in any medium.
