Author Topic: Holy Shit! Coriolis Effect between Northern and Southern Hemisphere seen in feet  (Read 2280 times)

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Offline BrianHGTopic starter

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 :scared:  Gotta see this... Holy Shit! Coriolis Effect measured/seen in draining water between Northern and Southern Hemisphere in only a few feet apart from each other.

I had no clue the switch was sooooo bloody sensitive compared to the size and scale of the entire planet Earth.
I would have figured that at least a few miles separation from the equator would have been needed to see anything at all, not 10 feet.


OK, it appears to be a scam.
The actual effect measured by Veritasium: https://www.eevblog.com/forum/chat/holy-shit!-coriolis-effect-between-northern-and-southern-hemisphere-seen-in-feet/msg5211456/#msg5211456


« Last Edit: December 08, 2023, 10:01:13 pm by BrianHG »
 

Offline iMo

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A CW and CCW spiral in the pipe would do it, imho..
« Last Edit: December 08, 2023, 09:06:31 pm by iMo »
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Offline T3sl4co1l

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Junk -- IIRC, calculations show the size of tank required to observe the effect is some ~m large, and would need to sit perfectly still for weeks before being opened very carefully so as not to disturb the flow upstream of the valve.  The spin would only become evident by the time the tank is nearly empty.

It would be responsible to add an actual citation, preferably paper, showing the above claims though.

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Online ataradov

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Yeah, this is just a tourist trap. There is no way you setup a clean experiment in an environment like this.

And "equator" is not a neat straight line with a known precise location. At least for the purposes of the Coriolis effect.
« Last Edit: December 08, 2023, 09:21:06 pm by ataradov »
Alex
 
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Online SiliconWizard

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As I remember, the only way of experimentally showing the Coriolis effect with simple equipment is to build a pretty large pendulum. As shown above, this sink stuff is just scam.
 

Offline BrianHGTopic starter

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Ahh, Veritasium attempted a real measurement of the effect on draining water in this video:
Now, this is the authentic minuscule effect I expected to be observed only over a huge distance, hundreds of miles above or below the equator.


« Last Edit: December 08, 2023, 09:43:07 pm by BrianHG »
 

Offline iMo

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As I remember, the only way of experimentally showing the Coriolis effect with simple equipment is to build a pretty large pendulum. As shown above, this sink stuff is just scam.

So, how would Foucault pendulum work +/- 10feet off the equator?
Any math handy?

PS: wiki:
Quote
When a Foucault pendulum is suspended at the equator, the plane of oscillation remains fixed relative to Earth. At other latitudes, the plane of oscillation precesses relative to Earth, but more slowly than at the pole; the angular speed, ω (measured in clockwise degrees per sidereal day), is proportional to the sine of the latitude, φ:
ω = 360 ∘ sin ⁡ φ   / d a y ,
where latitudes north and south of the equator are defined as positive and negative, respectively.

PS1:

w = 360 * sin (0.0000274) = +/- 1.72159E-4 degree per sidereal day..
« Last Edit: December 08, 2023, 09:59:59 pm by iMo »
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Offline EPAIII

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It is far more likely that the three basins were chosen for the slight imperfections in them that influence the direction of the rotation of the water. And the middle one, "on the equator" was probably the hardest one to "tune up" to get zero rotation.

It is quite possible they all have some fins inside the drain tubes which direct the water.

If you have ever played with a sink full of water and started the rotation when the stopper is pulled, you may have noticed that it does not take much of a start to get it to go one way or the other. Once it starts going one way, the effect is amplified by the velocity of the water going down the drain so it goes faster and faster as it drains. Try it in your bathroom or kitchen. Drain some sitting water a few times to see which way it wants to go. Then, do a run and give it a bit of a nudge in the other direction and watch it go that way just as fast.

Oh, and if you want to see the effect more easily, use a larger diameter drain. The larger the drain, the greater the effect because there will be more amplification.
« Last Edit: December 09, 2023, 10:16:14 am by EPAIII »
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And if you look REAL close at an analog signal,
You will find that it has discrete steps.
 

Offline electr_peter

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Nice trick for local attraction. Spin in water bowl can also be skilfully induced manually



Coriolis effect is easier to visualize using bigger objects as demonstrated by professor Clarkson



 


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