Nonsense.
Do ballerinas spin the opposite way, too?
Note that the water is poured from the side on one end of the basin, and it drains in the direction of the pour., clockwise on the south and counter clockwise on the north.
And we all know the toilets spin backward Downunder!
10 ft is absolutely negligible distance in terms of the earths surface and being off of perpendicularity to rotation.
Did you notice that in the beginning of the video, they waited for over a minute before pulling the plug, to make sure the water was absolutely still, but after moving supposedly off equator they pulled the plug almost immediately after filling the basin?
That is VERY cool.
Usually, when coriolis force is demonstrated, it’s in two dimensions, as on a merry go-round, and the rotation is in the plane (angular momentum vector perpendicular to the rotating plane).
On the earth, at the equator, the rotation is around the equator, and the tangent plane to the earth’s surface is perpendicular to the angular momentum vector. But, as you move away from the exact equatorial point, you are no longer exactly perpendicular, and there is some rotating frame effect in the tangent plane (which is the orientation of the sink).
I never would have guessed that the null was so sensitive to position that you’d go from clockwise drain swirlies to zero rotation to counter clockwise swirlies over a distance of a few yards.
It’s a hoax.
There is a Coriolis effect but the force is to gentle to effect a toilet (or a sink draining) based on the daily rotation of the Earth.
I think it’s just a reason to stare into toilets. Here in the US we have democrats to satisfy that urge.
Not as good as going to the “Mystery Spot” and watching water defy gravity!
Nonsense. A commonly repeated fraud. The Coriolis effect is for WIND, and is real.
The water in the first bowl was very still.
In the later one, she poured it from the side and it was still moving when she pulled the plug.
The Coriolis Effect is not strong enough on that scale to affect the direction of the water flow down a drain.
You can change the direction of the flow in the tub by swirling the water with your hand so the swirl in the basin can be artificially induced as well.
Amazing.
It’s an entertaining trick put on for tourists in Africa and South America. Coriolis effect is negligible close to the equator.
The magnitude of the Coriolis effect is a function of latitude. Absent very sensitive scientific equipment, it would be undetectable ten meters north or south of the equator.
Anyway, the direction of vortex when water drains is not the consequence of Coriolis effect. Notice the way the woman pours the water in each of the three cases.
The location for that line was determined my a surveyor in 1936. GPS shows his surveying skills sucked and the real equator is 800 feet north of that line.
It’s a hoax a magician’s trick.