A soprano's voice is sent by radio waves to a listener in a city 90 km away. (a) How long does it take for the soprano's voice to reach the listener? (b)In the same time interval, how far from the soprano has the sound wave in the auditorium traveled? Take the speed of sound to be 340 m/s.

Giltrapsx

Giltrapsx

Open question

2022-08-19

A soprano's voice is sent by radio waves to a listener in a city 90 km away.
(a) How long does it take for the soprano's voice to reach the listener?
(b)In the same time interval, how far from the soprano has the sound wave in the auditorium traveled? Take the speed of sound to be 340 m/s.

Answer & Explanation

Kingston Oliver

Kingston Oliver

Beginner2022-08-20Added 4 answers

(a)
The phrase "how long" ask for the time interval t taken by the radio wave with speed c to travel a distance d = 90 k m = 90 × 10 3 m
t = d c = 90 × 10 3 3 × 10 8 = 3 × 10 4 s
(b)
The phrase "how fast" ask for the distance d s traveled by a sound wave with v s = 340 m / s in the time interval t = 3 × 10 4 s
d s = v s t = ( 340 ) ( 3 × 10 4 ) = 0.10 m

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?