Synchronized playback of why vortices in the northern hemisphere and the southern hemisphere reversely rotate why they actually experimented under the same conditions

Two YouTubers who actually tried a story that "It is not easy to try both at the same time" that is worrisome that "the vortex when the toilet is shed is opposite in the northern hemisphere and the southern hemisphere?" I am approaching that mystery in a large experiment that is not limited to toilets.

The Truth About Toilet Swirl - Smarter Every Day & amp; Veritasium - Smarter Every Day
http://www.smartereveryday.com/toiletswirl/

Planning is a popular YouTube channel "SmarterEveryDay"Mr. Destin Sandrin and"VeritasiumDerek Müller of Mr. Derek Muller. In the collaboration of three years, it is planning to see contents linked in the northern hemisphere and the southern hemisphere by synchronized playback using the countdown timer inserted in the two pictures, but it is pretty easy to play the two side by side at the same time It is difficult to say that video images are arranged side by side synchronizing two images by volunteers.

First of all Kole is a survey picture of Mr. Sandrin's northern hemisphere.

The Truth About Toilet Swirl - Northern Hemisphere - YouTube


Here is the southern hemisphere of the investigation the video by Mr. Muller.

The Truth About Toilet Swirl - Southern Hemisphere - YouTube


And what is consolidated is this.

The Truth About Toilet Swirl - Both Hemispheres! Both videos synced in one. - YouTube


Sandrin on the left and Mr. Muller on the right.


First of all, there is a synchronization time for those who open the images separately.


On the left side of the screen, the Earth is displayed in the northern hemisphere. Meanwhile, Mr. Muller on the right is in Sydney, 34 degrees south latitude with Mr. Sandrin.


Eventually, the earth moved to the right side of the screen. Looking at the original image on the right side, it is such a story that the earth disappears as the two disappear outside the screen.


Mr. Sandrin appears on the left side where the earth is gone. I am at Huntsville, Alabama, 34 degrees north latitude.


Mr. Sandrine checked and various documentary there are both of the opinion that the opinion that "depends on whether the orientation of the vortices are in either of the hemisphere", and direct opposition "because the water is flowing the way you want flow hemisphere is irrelevant." Confirm that. Mr. Muller is also watching YouTube footage where Mr. Sandrin is opening here, if both are arranged side by side, an interesting production will appear more and more after this.


First of all, "to verify with your own eyes". Actually two people check the direction of rotation of the vortex with a toilet or sink ... ...


I will notice that it will not always be in a certain direction. It is very symbolic that Mr. Muller's hands turn the side-by-side sink vortices clockwise and counterclockwise, respectively.


This is due to the adoption of the design for clearing the inner water, in toilet, sink or bathtub. In other words, the rotation direction of the vortex in the toilet is not determined by "Northern Hemisphere or Southern Hemisphere", but it depends on how each toilet is designed.

... .... Since this is not a conclusion, the two people conducted an experiment with "it is not influenced by the design that creates a whirlpool". To that end, we first created a table.


Subsequently, a plastic pool with a radius of 1.52 m × depth of 25 cm came out. This is to observe the vortex which can be formed by filling water once and draining water here.


When putting water in, you can add water by a hose so you can flow the water. Therefore, in order to eliminate the influence of the flow, the pool filled with water is left overnight.


The next day, I will pull the stopper to make a whirlpool. In addition, when a stopper is directly attached to the bottom of the pool, subtle flow may occur due to the movement of the hand at the time of removing the stopper and there is a risk of influencing the way of forming the subsequent vortex, so the bottom of the pool We connected the tube from, and attached a valve at the tip to stop the water.


I started draining water, but since it is calm without waves and movement is completely unknown, a few drops of paint dripped so that we can see the movement of the water.


Then a whirlpool was born. It is counterclockwise in the northern hemisphere pool and clockwise in the southern hemisphere pool.


A schematic diagram of why it will be like this. When the pools are placed near the North Pole and the South Pole ......


There is a big difference in the distance traveled inside and outside the pool when the earth rotates on its own axis.


Water in the pool will flow towards the central drain, but lateral movement will be added so that it will arrive at a position displaced from the drain outlet. This difference is the catalyst to create a whirlpool.


Two people who saw a whirlpool formed "Coriolis' powerI was able to confirm "! I was delighted. The Coriolis force also influences the whirlpool when draining water with a sink or a bathtub, but since the influence from the shape of the sink or bathtub is larger than it is canceled, the northern hemisphere does not always counterclockwise There are cases where a whirlpool can not be created.

There are typhoons (hurricanes) as examples of things that Coriolis' counter force is counterclockwise in the Northern Hemisphere and clockwise movement in the Southern Hemisphere. In the case of typhoons, it is OK to replace "water heading for drainage" with "wind towards low pressure".


It is not difficult to show "how the whirlpool can be formed in the northern hemisphere and the southern hemisphere", but the technique that makes funny looking at synchronized play will receive the impression of popular YouTuber as expected.