How long will sound take to travel in (a) an iron rail and (b) air, both 3.3 km in length? Take speed of sound in air to be 330 m/s and in iron to be 5280 m/s.
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a) speed = distance / time
time =distance / speed =3.3 ×1000 /5280 =0.625s.
(b) time =distance / speed =3.3×1000/330=10s
time =distance / speed =3.3 ×1000 /5280 =0.625s.
(b) time =distance / speed =3.3×1000/330=10s
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