State an approximate value for the speed of sound in air.
Sound travels at 5000 m/s in steel. Calculate the time it takes for the sound to travel along the rail.
The man with his ear to the railway line actually hears two sounds from the hammer, separated by a short interval. Explain why he hears two sounds.
Answer:
The approximate value for the speed of sound in air is 344 m/s.
As we know, the speed of sound is different in different materials. Sound travels about 15 times faster in steel than in air. The man hears two sounds one through air and other through railway line made of steel.