PROBLEM 6Q

What units are used to measure pressure?

Solution 6Q

- Pressure is defined as force divided by area i.e p = F/A
- In the metric system pressure is measured in newtons per square meter, called a pascal (Pa). One pascal is a very small pressure, so usually the kPa, or 1,000 Pa, is used. In the English system, pounds per square inch (psi) is often used.
- The SI unit for pressure is the pascal (N/m2), but other common units of pressure include pounds per square inch (psi), atmospheres (atm), bars, inches of mercury (in. Hg), millimeters of mercury (mm Hg), and torr. A pressure measurement can be described as either static or dynamic.