[VadeRetro]

For that matter some "science" teachers have taught that toilet bowls flush one way in the Northern Hemisphere and the other way in the Southern Hemisphere.

Don't know if it works reliably for toilet bowls, but the coriolis effect sure works for cyclonic (or anticyclonic) storms.

[Central Scrutiniser]

For that matter some "science" teachers have taught that toilet bowls flush one way in the Northern Hemisphere and the other way in the Southern Hemisphere.

Once, on a flight from LA to Lima, Peru, I went to the bathroom as we were transiting the equator. I flushed, wanting to see which way the water would flow. But, you know, them damned 767's and their suction toilets! FWIW, the water in the sink went straight down, but hardly a scientific laboratory!

[kuma]

Yes but that is because those are much larger patterns of motion to work with but toilet flushing is more greatly influenced by the shape of the bowl or minute movements already within the water than by the coriolis effect.

[kuma]

Yes but that is because those are much larger patterns of motion to work with but toilet flushing is more greatly influenced by the shape of the bowl or minute movements already within the water than by the coriolis effect.

I'm just trying to give examples of bad science that has been found in textbooks. At the least textbook manufacturers should have to issue updates/corrections within mini-booklets that could be distributed to the teachers.