Suppose i have a drinking straw that is 50 cm long and vertical. i apply suction from my mouth at the top end and the water reaches the top end. At this point, is it correct to say that i am "able to generate 50 cm of negative pressure" ?
2006-12-01 22:13:47 · 6 answers · asked by Nirmala 4 in Science & Mathematics ➔ Engineering
the fluid i refer to is water.
i am doing some medical research and am not an engineering person, so forgive the simple nature of my question. i have proven that a certain device can pull water up a 50 cm column. i want to know if i can "scientifically" say that it can apply a negative pressure of 50 cm water.
2006-12-01 22:19:38 · update #1
The correct terminology you are searching for is vacuum in "cm of water" for your units.
Yes, if your pump will lift 50 cm of water in a drinking straw, it will lift 50 cm in a coffee can as well. The area of the "straw" cancels the area term of the weight of the water column, so what you are left with is your "cm of water" term for your magnitude on your vacuum.
If you will convert your "cm of water" to "inches of water" (by using a conversion of cm to inches) or to "mm of HG ("mercury" by applying a conversion term based on cm to mm and the density of water to the density of HG, you will be in units that most pump people operate in.
2006-12-02 02:35:34 · answer #1 · answered by www.HaysEngineering.com 4 · 0⤊ 0⤋
yes you are able to create 50 cm of negative pressure in a suface are of the diameter of the straw.
Vacuuum is calculated as an amount of "Hg" (mercury) per square inch or square centimetre if you live in the modern world.
2006-12-01 22:17:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
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2016-11-30 01:14:55 · answer #3 · answered by ? 4 · 0⤊ 0⤋
50 cm (name of liquid) column of negative pressure. Standard measurements are usually water column or mercury column.
2006-12-01 22:15:45 · answer #4 · answered by icynici 4 · 0⤊ 0⤋
I don't think so because this amount varies depending on the diameter of the straw. I think it would be expressed in pounds per square inch. (Or the appropriate metric measurement)
2006-12-01 22:18:42 · answer #5 · answered by tumbleweed1954 6 · 0⤊ 1⤋
Ok so what is the point of asking this question?
2006-12-01 22:15:59 · answer #6 · answered by valbriannazjosh 2 · 0⤊ 0⤋