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the claim

You can tell how far lightning is by thunder delay.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that you can tell how far lightning is by thunder delay?

Yes. A physics Q&A and a math textbook exercise both state that counting the seconds between lightning and thunder gives the distance (roughly one mile per five seconds). A Wikipedia note adds that distant thunder may not reach the observer at all, a limitation on the method.

Verdict: SUPPORTED · 3 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 3
Without seeing the lightning, can you tell how far away it ...
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Without seeing the lightning, can you tell how far away it.... (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/104304/without-seeing-the-lightning-can-you-tell-how-far-away-it-struck-by-how-the-thu

Evidence against · 1
Simple English Wikipedia: Heat lightning
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Simple English Wikipedia: Heat lightning. (n.d.). simple.wikipedia.org. https://simple.wikipedia.org/wiki/Heat_lightning

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More for · 2
LibreTexts: 4.09: Problem Solving Exercises
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LibreTexts: 4.09%3A Problem Solving Exercises. (n.d.). math.libretexts.org. https://math.libretexts.org/Courses/Lumen_Learning/Mathematics_for_the_Liberal_Arts_(Lumen)/04%3A_Module_1-_General_Problem_Solving/4.09%3A_Problem_Solving_Exercises

Sound Actions
2022
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Jensenius, A. R. (2022). Sound Actions. books.google.com. http://books.google.com/books?id=eftjEAAAQBAJ&dq=You+can+tell+how+far+lightning+is+by+thunder+delay.&hl=&as_pt=BOOKS&source=gbs_api

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