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 [tex]t=1\cdot 10^{-3}s[/tex] by using the relationship between space and time in a uniform motion:
[tex]S=vt=(340 m/s)(1\cdot 10^{-3} s)=3.4 \cdot 10^{-1}m[/tex]
So, the correct answer is D) 3.4 x 10^-1 m.
