Question

A sound wave in air has a velocity of 334ms-1. If sound of frequency 12000Hz is emitted, a. what will the wavelength be? b. how long will it take the sound to travel 35km? c. determine the time-period of the sound waves. d. how long will it take a clap of thunder to reach an observer 3.4km from the source.

Answer 1

Answer:

A. 0.0278 m

B. 0.09542 s

C. 0.000083 s

D. 0.1 s

Explanation:

A. Velocity = 334 m/s

Frequency = 12000 Hz

Wavelength = Velocity / Frequency

= (334/12000) m

= 0.0278 m

B. Distance = 35 km or, 3500 m

Speed = 334 m/s

Time = Speed = Distance / Time

= 334 = 3500/Time

= 0.09542 s

C. Time Period = 1/Frequency

= (1/12000) s

= 0.000083 s

D. Distance = 3.4 km or, 3400 m

Speed = 340 m/s

Time = Speed = DIstance / Time

= 340 = 3400/Time

= 0.1 s

Hope this helps.