Question

how far will sound travel through air at 20 C in 1.00 x 10^-3 s?
3.4 x 10^1 m
3.4 x 10^0 m
3.4 x 10^-3 m
3.4 x 10^-1 m

Answer 1

The speed of sound in air at T=20 C is approximately v=340 m/s.
We can calculate the distance covered by a sound wave in $t=1\cdot 10^{-3}s$ by using the relationship between space and time in a uniform motion:
$S=vt=(340 m/s)(1\cdot 10^{-3} s)=3.4 \cdot 10^{-1}m$
So, the correct answer is D) 3.4 x 10^-1 m.