# What Is PSI?

PSI is a measurement for pressure, which stands for Pounds per Square Inch. It is the amount of force in pounds that is exerted on one square inch. The pressure in a car tyre for example is 32 PSI.
Psi, written as Ψ or ψ, is the 23rd letter in the Greek Alphabet.
Letters of the Greek Alphabet:
The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in2 or lbf/in2 or lbf/sq in or lbf/sq in) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch. 1 psi approximately equals 6,894.757 Pa, where pascal (Pa) is the SI unit of pressure.
Q&A Related to "What Is PSI"
 PSI is pounds per square inch. PSI is used as a measurement for inflating tires. Always check your owners manual if you are not sure how much PSI your tires require! http://answers.ask.com/Reference/Other/what_is_psi
 The Imperial system of measurement is based on the English system, which dates back to colonial England. Units of measurement were defined and recorded in the Magna Carta, which was http://www.ehow.com/about_6574487_psi_.html
 Answer Pounds per Square Inch - a measurement of compressed air inside a vahicle tire. Answer Pounds per square inch Answer It is a Play Station 1 (video game system). http://wiki.answers.com/Q/What+does+70+PSI+represe...
 1 Meditate . Before you can make a psi shield you need to be relaxed and be able to fully concentrate. Ad 2 Rub your hands together to gather energy. After a http://www.wikihow.com/Make-a-Psi-Shield
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PSI stands for pounds per inch. PSI measures anything with pressure. The most common item measured in PSI is tire pressure. A tire gauge will measure how much ...
PSI balls are balls of energy. To make PSI balls, you form heat by rubbing your hands together. Eventually, you move your hands back and forth until you feel the ...