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## anonymous one year ago How far do sound waves travel in 1.00 × 10^-3 s in air at 20°C? A. 3.43 × 10^-3 m B. 3.43 × 10^-2 m C. 3.43 × 10^-1 m D. 3.43 × 10^1 m **Not sure :( thank you!

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1. Michele_Laino

we have to compute this: $\Large d = vt = 343 \times {10^{ - 3}} = ...meters$

2. Michele_Laino

since the speed of the sound in air at 20°C is about 343 m/sec

3. anonymous

okay!! so we get 0.343 ? so is choice A our solution?

4. Michele_Laino

that's right!

5. Michele_Laino

please wait, it is: 0.343 ok! so it is option C

6. anonymous

ohhh right!! it is positive!! so C it is!! :D thank you!

7. Michele_Laino

thank you!! :)

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