A general rule for estimating the distance in kilometers between an observer and a lightning bolt is to count the number of seco
nds between seeing the lightning and hearing it, and dividing by
a) 5
b) 3
c) 2
d) 4
e) none of these
1 answer:
Answer:
option b ) is correct
Explanation:
Let d be the distance in km from the place of lightning . velocity of sound is 340 m /s approx
in km/ s it is 0.34 km/s
time in sec taken by sound to cover a distance of d km
d / .34 = t
d = .34 t
d =
d = t / 3
so option b ) is correct . ,
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