1 Answer

Asveikau · Answer 1 · 2019-03-15T11:42:04+0000

Sound travels at speed v=343 m/s, therefore the time the sound takes to cover a distance of

S= 1 cm=0.01 m

is

$t= (S)/(v)= (0.01 m)/(343 m/s)=2.9 \cdot 10^(-5) s$

Light travels at speed
$c=3 \cdot 10^8 m/s$ , therefore the distance it travels during the same time t is

$S=ct=(3 \cdot 10^8 m/s)(2.9 \cdot 10^(-5) s)=8746 m=8.75 km$

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