Thread: I've always wondered.

Originally Posted by strangy

If you didn’t know when you were born, how old would you be?

As old as your tongue and a bit older than your teeth.

Originally Posted by Blknight.aus

Good Question, And



Poppycock.

The reason you yawn is to equalize the pressure between the internal sections of the ear and the outside sections (basically balancing the ear drum which is why sometimes when you cant get a normal Valsalva to work you can pull it off by enacting a yawn)

Now when you equalize your ears by yawning the shape of your ear drum changes, as this has an immediate effect on the volume of the air this causes the air pressure to change. This change in air pressure means that someone else's ears need to adjust as their ears are now out of balance so they yawn. The air pressure again has changed so the next person along yawns and so the cycle repeats on a negative feed back untill all the people have their ear pressure balanced within what is their acceptable tolerance of the air pressure around them and no further pressure changes occur.

By this reasoning, an aeroplane's propeller doesn't just move the plane through the air, but it also serves to keep the pilot cool, and I can prove it, just watch how much he sweats when it's turned off.

I thought yawning was a build up of co2 in the body and yawning was a was of purging the body of co2. But on another note where does the wind come from and where does it go .

[QUOTE=carjunkieanon;2878279]Technically - yes. However the Coriolis effect is so weak that local forces almost overwhelm it on the scale of a bathroom sink/toilet/etc (only really works on huge weather systems). Also, it's at its weakest at the equator. I suspect the enterprising bloke on the equator set up his sinks to drain different ways.


Same bowl. He carries it in his hands. A round kitchen bowl with a hole in the bottom and a bung, nothing technical. I think he was featured in the episode of 'Long Way Down' where they cross the equator.

[QUOTE=POD;2878322]

Originally Posted by carjunkieanon

Technically - yes. However the Coriolis effect is so weak that local forces almost overwhelm it on the scale of a bathroom sink/toilet/etc (only really works on huge weather systems). Also, it's at its weakest at the equator. I suspect the enterprising bloke on the equator set up his sinks to drain different ways.


Same bowl. He carries it in his hands. A round kitchen bowl with a hole in the bottom and a bung, nothing technical. I think he was featured in the episode of 'Long Way Down' where they cross the equator.

Science teacher I know used to do it with the same bowl at different ends of the classroom. At one end, he'd turn to face us clockwise, the other end he'd turn anticlockwise. The way he turned set up moment in the bowl that then directed the water to spin a particular way. #partytrick

This looks like becoming one of those perpetual threads. Many amazing answers will come but we'll all be left wondering.

Which way is up?

Originally Posted by DiscoMick

Which way is up?

180 degrees from “down”