Advertisements
Advertisements
प्रश्न
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
A sound wave travels at a speed of 339 m s−1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
Describe an experiment to show that sound can travel in a solid.
Write the approximate speed of sound in air.
During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
What is meant by supersonic speed?
Write the formula for speed of sound in a gas using Laplace correction.
Velocity of sound in a gaseous medium is 330 ms–1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is
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 ______.
The speed of sound in a gaseous medium depends on the nature of the gas.
