I caught a little bit of Bev's OTL last Friday when Rachie went on for a Free For All Friday chat. Rachie was challenging Bev about water levels. Bev was obviously regurgitating his usual wellrehearsed horizontal spiel so Rachie had to repeatedly ask for evidence. Bev didn't provide any. That's when I thought I'd explore the geometry of some of his claims for myself to help me visualise what is going on. (Sorry if my voice was coming and going. Not well.)

⁉ Notes about this geometry:
The scale used xAxis:yAxis was 150:1 and the tubes are in fact perpendicular to the surface even though it might not look it.

The objective was to produce accurate, measurementbased results for the table while squeezing 16 riser tubes on to one screen without having to change the zoom or drag the screen about in order to see everything at once, including the small amounts of drop. This is impossible when keeping the ratio at 1:1 so I made it 150:1 which I noted with a graphic at the beginning.

If I kept the ratio at 1:1 while trying to observe curvature then you can't even see the tubes let alone any drop. Earth is big!

Videos clips used:
Try Thinking, OTL with Rachie 00000
https://www.youtube.com/live/WU43MsV7...

I Can Science That
https://www.youtube.com/live/rnQxY0N2rsw

Brandon's
https://www.youtube.com/live/I9CZKeSbb7g

GeoGebra Link:
https://www.geogebra.org/m/pvv9ruvs

Chapters:
0:00 Start
0:36 Controls
1:49 All Points
3:49 AL Drop
4:33 ICST Clip
4:59 50m Drop
5:11 Brandon's Clip
6:49 50m Midpoints
8:24 Question
9:16 Angle Change
10:06 GeoGebra

#subtitles #geometry