Problem: According to a rule-of-thumb, every five seconds between a lightning flash and the following thunder gives the distance to the flash in miles.Assuming that the flash of light arrives in essentially no time at all, estimate the speed of sound in m/s from this rule.What would be the rule for kilometers?

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According to a rule-of-thumb, every five seconds between a lightning flash and the following thunder gives the distance to the flash in miles.

Assuming that the flash of light arrives in essentially no time at all, estimate the speed of sound in m/s from this rule.

What would be the rule for kilometers?

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