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the claim

The Coriolis effect determines the direction water drains.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 5 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 the Coriolis effect determines the direction water drains?

No. Multiple reference sources and a Snopes fact-check state that the Coriolis effect is far too small at household scale to determine which way water drains; drain direction is set by basin geometry and initial water motion.

Verdict: REFUTED · 0 sources for, 5 against · Last checked

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Evidence against · 5
Coriolis force - Wikipedia
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Coriolis force - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Coriolis_force

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More against · 4
Does the Coriolis Effect Determine Which Direction Water Goes ...
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Does the Coriolis Effect Determine Which Direction Water Goes.... (n.d.). snopes.com. https://www.snopes.com/fact-check/coriolis-effect/

How to show that the Coriolis effect is irrelevant for the whirl/vortex in the sink/bathtub?
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How to show that the Coriolis effect is irrelevant for the whirl/vortex in the sink/bathtub?. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/32

Coriolis force at small scale
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Coriolis force at small scale. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/651377

Princeton Companion to Applied Mathematics
2015
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Higham, N. J., Dennis, M. R., Glendinning, P., Martin, P. A., Santosa, F., & Tanner, J. (2015). Princeton Companion to Applied Mathematics. books.google.com. http://books.google.com/books?id=VWeYDwAAQBAJ&dq=The+Coriolis+effect+determines+the+direction+water+drains.&hl=&as_pt=BOOKS&source=gbs_api

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