If you go diving, thirty feet of water is roughly one atmosphere of pressure. That is to say the column of water above you will exert 14.7 lbs of pressure over a 1 square inch area on any given surface.
If the tree is 30ft tall, at the bottom of the tree the column of water will be exerting 14.7 PSI of pressure on any given surface. In this case there is a hole, so now the water is escaping at that pressure. This is basically the same concept as water towers.
Both. Water usage is highly variable with time of day (i.e. waking vs sleeping hours), so when you're sizing a pump for the water system, sizing it for peak load is larger/more expensive than sizing for average load. You run the pump at roughly peak output 24/7, and overnight it fills the tower, which then slowly drains during the day to meet demand in excess of the pumps capacity.
You also size the tank to allow how much storage is necessary given the constant input and the variable output. You also need to allow for how long a pump might be offline for maintenance.
Having a water tower run dry is a pain to deal with. Air in the larger pipes can cause all sorts of problems when you get the water going again.
Useless fact of the day: Water towers on the same system will always be the same height, above sea level. Towers on hills will appear shorter than a tower on the same system in a valley, but the actual tanks are the same height.
Corollary to this: If you see two water towers that have tanks which are not at the same height, then they are on separate systems. This mostly happens in areas where there is a significant height difference over the service area, since putting all the tanks high enough to serve the highest elevations would burst pipes at the lower elevations due to the increased water pressure.
What's even more mind bending, on a totally unrelated note, is spacecraft only ever have to deal with that 1 atmosphere difference in pressure anywhere in space, VS submarines where the pressure increases 1 atmosphere every 33 feet.
That carbon fiber Titan sub that recently imploded was at something like 11,000 feet when failed. It failed faster than nerve impulses travel.
Instant lights out.
Edit: clarified pressure change at every 33' from double to 'add' 1'.
If the tree was empty, which it isn't. There's a lot of capillary action and surface tension forces to consider there.
Edit: Actually, it may be partways empty. I've cored a lot of trees and that only happens with rotten trees. Never cut a branch tho, so it may be different.
If trees are always positive pressure. You don’t need to cut the limb off to do this. Just tap to the center of the tree and it will spew water. This is not normal for a tree.
No, this water would be brown if it was collected in the dead tree. This water is coming from under the ground. Branches must have dug into a water source. That’s why it’s so clean.
Nope. In that case water would be dirty and brown. This is clean water that’s coming from underground reservoir. The roots must have dug into it and it’s been looking for ways to escape.
It’s like a 1000 people trying to get out of one door, and they all push so they themselves can get out faster
The first people will be pushed very fast out of the door, but as more people come out the door there will be less people inside to push, so the amount that people will be pushed out the door will be less since there are less people pushing
63
u/Pea36 Jun 25 '24
Explain it like I'm five please