Question

If you are 600 m from a better when you see him hit a ball, how long will you wait to hear the sound of the bat hitting the ball (at 20

Answer 1

$S = 600m$

$\text {Light speed } v_l =3*10^8\frac{m}{s}$

$\text {Sound speed at }20\degree C v_s=343\frac{m}{s}$

$t =\frac{S}{v_l}+\frac{S}{v_s};\frac{S}{v_l}\approx 0;$

$t \approx \frac{S}{v_s}=\frac{600}{343}\approx 1.75s$

$\text{Answer:}1.75s$