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Suppose you hear a clap of thunder 13.4 s after seeing the associated lightning strike. The...

Suppose you hear a clap of thunder 13.4 s after seeing the associated lightning strike. The speed of light in air is 3.00 ✕ 108 m/s.

(a) How far are you from the lightning strike? (The speed of sound waves in air is 343 m/s.)
km

(b) Do you need to know the value of the speed of light to answer?

Yes

No    

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