The Cool Science Stuff Thread

It begins...

Perhaps, the U.S. satellite that is keeping an eye on China’s Shijian-21 satellite ( SJ-21)
might be granted a "body guard" that has similar defences.
 
is the second one anything to do with the contents of the bottles in the first one? :eek: (asking for a friend)

Middle bottle is a vacuum. Air pressure forces the liquid through. As soon as you take the top off you can see it equalises.
 
Middle bottle is a vacuum. Air pressure forces the liquid through. As soon as you take the top off you can see it equalises.

so this isnt an explosive mix that when it equals out it explodes? :( thats a bit like the fill a petrol / oil can with boiling water, then screw the cap on and when it cools air pressure crushes it.

Much more fun if putting a full petrol can on a camping stove to demonstrate the flash point of petrol.
 
Doh, other way round. Middle bottle is at a higher pressure than the other two.
 
Perhaps not a full vacuum but definitely lower than ambient.

It all starts at atmospheric pressure. Then, when the fluid level covers the outlet in the middle bottle, the air pressure in the middle bottle rises slightly, and the third bottle fills. At no time is any part of this below atmospheric pressure.
 
It all starts at atmospheric pressure. Then, when the fluid level covers the outlet in the middle bottle, the air pressure in the middle bottle rises slightly, and the third bottle fills. At no time is any part of this below atmospheric pressure.

Yeah, I sussed it after looking at it again.
 
Or, making it work the way you want it to (or at least, hope it will).
 
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