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!

Question

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!

michele_laino · Answer

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

michele_laino · Answer

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

anonymous · Answer

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

michele_laino · Answer

that's right!

michele_laino · Answer

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

anonymous · Answer

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

michele_laino · Answer

thank you!! :)