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!

Answer 1

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

Answer 2

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

Answer 3

okay!! so we get 0.343 ?

so is choice A our solution?

Answer 4

that's right!

Answer 5

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

Answer 6

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

Answer 7

thank you!! :)