1.

A sound wave has afrequency of 2 kHz and wave length35 cm. How long will it take to travel1.5 km?

Answer»

F= 2000hzw.l. = .35m

speed = f × w.l.700m/s

now dist. = 1500 mtime= d/sp.1500/70015/7s2.142sec.



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