User Panel
User Panel
User Panel
|
Posted: 8/26/2023 6:14:35 PM EDT
[#1]
Quote HistoryQuoted: Also, beware Delta P injuries and fatalities. Friend had a kid die this way in a pool when I was young.  Dangers of Delta-P Crab Sucked into Pipe by Delta-P Turtle found out.  Suction Turtle by FredMan, on Flickr
|
|
|
|
Posted: 8/26/2023 6:16:15 PM EDT
[#2]
Quote HistoryQuoted: They had a wildfire in north Florida back in the 80s, on a flatwoods site, heavy organic soils. They ran a 17 mile hose lay to feed the sprinklers wet tingling down the peat. I forget how many, but it was a series of staged engines pumping water to drop tanks, in sequence, to get the water to the fire. I’m sure it was under 500 feet between tanks. Now that’s an interesting concept. |
|
|
|
Posted: 8/26/2023 8:15:09 PM EDT
[#3]
Quote HistoryQuoted: Quiz time. Is it the weight of the water causing the pressure or the weight of the atmosphere on the water? They are both fluids. Or is it the difference in pressure between the glass vessel and air vs water combined with atmosphere? Weight due to gravity (potential energy, related to the height at the highest vs lowest levels). If the 1" x 100' pipe was horizontal, there wouldn't be much pressure at all. It's why one measure of pressure is inches of water column/inH2O. There is no volume quotient. It's just vertical height of the water column (whether it's a 1 inch diameter pipe, or the base of a dam). |
|
|
|
Posted: 8/28/2023 12:11:25 PM EDT
[#4]
I'll show my ignorance.
Why doesn't snorkeling with a 10ft tube work? Why isn't the air inside the tube equalized with the atmosphere? Edit - or are we just referencing the pressure on the human diaphragm? |
|
|
|
Posted: 8/28/2023 12:15:02 PM EDT
[#5]
Quote HistoryQuoted: I'll show my ignorance. Why doesn't snorkeling with a 10ft tube work? Why isn't the air inside the tube equalized with the atmosphere? Your lungs can’t expand due to water pressure on them so much greater than air pressure. It’s why scuba works. You are breathing air at water pressure at whatever depth you’re at so it feels like normal breathing. Though you are actually taking in MUCH more air at depth. At 100 feet you are breathing 4 times more air per breath. Which means 4 times more nitrogen. |
|
|
|
Posted: 8/28/2023 12:19:14 PM EDT
[#6]
Quote HistoryQuoted: https://4.bp.blogspot.com/_pTZB5kOC5GI/SwbcgB6PFrI/AAAAAAAAAAk/DlHbyq1SwHQ/s1600/Poolpanarama.JPG And could have been all avoided by having this in the bottom of main drain pot https://www.poolwarehouse.com/wp-content/uploads/2021/11/SP1056.jpg Several years ago we had torrential rains for days on end, flooding everywhere. A house I drive by every day had their septic tank float right out of the ground, I'm assuming it had just been pumped and didn't have enough weight in it to keep it in place. |
|
|
|
Posted: 8/28/2023 4:13:01 PM EDT
[#7]
Why build giant water towers then? why not just a huge basin with a small tube on top to maintain pressure?
|
|
|
|
Posted: 8/28/2023 4:24:43 PM EDT
[#8]
Quote HistoryQuoted: Why build giant water towers then? why not just a huge basin with a small tube on top to maintain pressure? Because gravity is your friend when it comes time to feed that water somewhere, like a fire hydrant. |
|
|
|
Posted: 8/28/2023 4:27:08 PM EDT
[#9]
Quote HistoryQuoted:. For every 2.3 ft of vertical water depth, the pressure increases by 1 psi. It's even more for salt water. -ZAZAGABOR |
|
|
|
Posted: 8/28/2023 4:29:38 PM EDT
[#10]
Quote HistoryQuoted: Don’t breathe compressed air  |
|
|
|
Posted: 8/28/2023 5:00:53 PM EDT
[#11]
Quote HistoryQuoted: Why build giant water towers then? why not just a huge basin with a small tube on top to maintain pressure? Because as soon as you use the amount of water in the small tall tube, your pressure is gone. Nobody wants 5 gallons at full pressure, they need all the tank to be delivered at full pressure. |
|
|
|
Posted: 8/28/2023 6:01:12 PM EDT
[#12]
Quote HistoryQuoted:. Also, water is in fact compressible. Inconceivable!! |
|
|
|
Posted: 8/28/2023 6:03:01 PM EDT
[#13]
Quote HistoryQuoted:. Princeton physics and they're learning what most people learn in high school? WTF? |
|
|
|
Posted: 8/28/2023 6:21:48 PM EDT
[#14]
Quote HistoryQuoted:. It's another reason why water pressure and electrical voltage are analogous. That long thin column can exert a lot of pressure, but can't do as much work as a long thick column. Volts is to pressure and Amps is to volume. 
|
|
|
|
Posted: 8/28/2023 6:24:28 PM EDT
[#15]
Quote HistoryQuoted:. The only thing that matters is the height of the column of fluid for pressure not how wide it is. So a skinny bitch be the same as a fat bitch if they are the same height ? |
|
|
|
Posted: 8/28/2023 6:31:50 PM EDT
[#16]
|
|
|
|
Posted: 8/29/2023 9:32:25 AM EDT
[#17]
Quote HistoryQuoted: Why build giant water towers then? why not just a huge basin with a small tube on top to maintain pressure? Assuming you make a tube small and strong enough to hold 1 gallon of water, but extended 200 feet in the air, the basin will be greatly pressurized. But the second someone cracks a faucet, they will only get part of a gallon before pressure drops to zero. Pressure != work |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
