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milmar
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How would I calculate water pressure in a vertical column? I had about a 17 foot PVC tube with a 4" diameter filled with water. What equations could I use?
sophiecentaur said:Ye Gods.
When I was at School, in the early 1950's, we had exercise books with tables on the back cover. They told you how many yards in a Rod, pole or perch, how many Fluid Oz in a Pint, Yards in a mile, square yards in an acre etc. etc.
By the time I left School, in the early 60's, the UK had kicked all that stuff into touch and were using a decimal system in Science. How is it that the US still uses such a numbingly naff system? You'd have thought the example of Dollars and Cents would have given them the clue. Added to the fact that it is called the "Imperial System", I can't think how the Republicans or Democrats could stand using the very word "Imperial". How does the Tea Party stand on units (or would they recognise one if they trod on it)?
sophiecentaur said:To be honest, we still drink Pints of beer. This is probably because it is just bigger than a half litre, which always looks a bit stingey in a glass.
Our system is still not sorted out. We buy motor fuel in litres but our road distances are still in miles. You have to make a real effort to assess your car fuel consumption either in mpg or g/km. I think that's a nasty government trick!
But I am really amazed just how many posts pose questions in 'old money'.
Owch!McQueen said:1 joule = 1 watt = 1 Newton metre as opposed to BTU, hp and watt, none of which even vaguely resemble one another. And what about ,God forbid, the slug.
Oh no! that's even worse! We, Continentals, express it in litres per 100 km! My small Peugeot burns about 7l/100km...sophiecentaur said:car fuel consumption either in mpg or g/km. I think that's a nasty government trick!
I guess that was the times I met esterling system - in very last its years (I visited England in 1970, I was 15 then, but those times nobody asked for ID if teenager ordered a beer in a pub) - half crown a pint...sophiecentaur said:2/6 a pint.
Water pressure in a vertical column is the force per unit area exerted by the weight of water in a vertical column. It is typically measured in units of pounds per square inch (psi) or newtons per square meter (N/m²).
To calculate water pressure in a vertical column, you will need to know the height of the column (in feet or meters) and the density of water (in pounds per cubic foot or kilograms per cubic meter). Then, multiply the height by the density and the acceleration due to gravity (9.8 m/s²) to get the pressure in units of force per unit area (N/m² or psi).
The two main factors that can affect water pressure in a vertical column are the height of the column and the density of water. Other factors that may have a smaller impact include temperature, atmospheric pressure, and the presence of impurities or air bubbles in the water.
As you go deeper in a vertical column, the water pressure will increase due to the weight of the water above. This is because the depth of the column increases, and therefore, the weight of the water increases. The rate of increase in water pressure is directly proportional to the depth.
Water pressure in a vertical column can be measured using a device called a manometer, which measures the difference in pressure between two points in a fluid. The most common units for measuring water pressure are psi and N/m², but other units such as bars or atmospheres may also be used.