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Flash and bang
Return to DiscussionsRE:Flash and bang
We were in a thunder storm. You can tell how far away it is by timing the gap between the flash of lightening and the rumble, or bang, of thunder.Then I was asked how long it was for me between the flash and the bang.
The speed of sound is approximately 1100 ft/sec or 343 m/sec. That's about a mile for every 5 seconds or a kilometer for every 3 seconds.
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