Saturday

April 18, 2015

April 18, 2015

Posted by **Lily** on Wednesday, November 25, 2009 at 8:10pm.

- Physics -
**MathMate**, Wednesday, November 25, 2009 at 11:55pmGauge pressure is the pressure relative to the ambient atmospheric pressure.

A pascal (Pa) is the unit of measurement of pressure equivalent to 1 N (newton) acting on an area of 1 m².

To produce a pressure sufficient to suck water to a height of 187 mm, the pressure is equivalent to the total weight of 187 mm high of water in a container exactly 1 m³ in area.

Let g=acceleration due to gravity, m/s²

Pressure = mg N

=(0.187*1*1) m³ * 1000 kg/m³ * 9.8 m/s²

= 18326 pascals

= 18.326 KPa

Since to suck water, the pressure must be negative, so the required gauge pressure is -18.3 KPa.

- Physics-corr -
**MathMate**, Thursday, November 26, 2009 at 12:03amSorry, the numerical value was erred by a factor of 10. It should read:

= 1833 pascals

= 1.83 KPa

**Answer this Question**

**Related Questions**

Physics - To suck water up a straw to a maximum height of 68 mm, what minimum ...

Physics - To suck water up a straw to a maximum height of 98 mm, what minimum ...

Physics - Suppose you have a very long straw that can reach from a cup of water ...

Physics - Suppose you have a very long straw that can reach from a cup of water ...

Physics - The highest that George can suck water up a very long straw is 2.0 m...

physics - The highest George can suck water up a very long straw is 2.0m What is...

English - 1. What a pity! 2. What a shame! 3. What a suck! 4. That sucks...

physics - Water is to be pumped to the top of a skyscraper, which is 1270 ft ...

Physics - A Blowhard Tests of lung capacity show that adults are able to exhale...

Physics - What gauge pressure (in atm) in the water mains is necessary if a ...