Question

How long will sound take to travel in i)a steel rail and in ii) air, both 3.5 km in length?​

Answer 1

Answer:

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Explanation:

Converting the distance in km to metre we will get a distance of 3300m. Thus, it will take sound (a) 0.625s in a rail to travel a distance of 3.3km. Similarly, it will take sound (b) 10s in the air to travel a distance of 3.3km.

Answer 2

Answer:

time=distance/speed

i) speed of sound in steel= 3150m/s

distance= 3.5km = 3500m

time taken= 3500/3150

                 = 1.11 seconds

ii) speed of sound in air= 344m/s

distance= 3.5km = 3500m

time taken= 3500/344

                 = 10.17 seconds

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