Question

Name the quantity whose one of the units is pascal ( $Pa$ ).

Answer 1

The unit pascal is also the same as newton per square meter. We know that newton is a unit used for force and meter square is unit used for area. Thus, pascal is unit for some quantity which is ratio of force per unit area. We need to find this quantity.

Complete step by step answer: One pascal is the pressure of one newton force over a surface area of unit meter square. In SI units it can be also understood as pressure of one kilogram per meter per second square. Pascal is denoted as $Pa$ and it can also be written as $N\,{m^{ - 2}}$ .

The answer for this question is Pressure. Pressure has one of its units as pascal (Pa).

Additional details: The pressure of one pascal is very small. The most commonly used unit is kilopascal denoted as $kPa$ . Pressure is the amount of force applied normal to the surface of an object per unit area, all quantities in SI units.

The other units of pressure are: pounds per square inch ( $psi$ ), dynes per square inch and Newton per square meter $N\,{m^{ - 2}}$ .

The unit “bar” is also used to denote pressure but it is not the SI unit. The relation between bar and pascal is as follows: $1\,bar = \,{10^5}\,Pa$ .

Note: Pascal is not the SI unit of pressure. Pressure is also measured in the units as bar. Pascal can also be written as $N\,{m^{ - 2}}$ . One pascal is a significantly small quantity and thus, we use units such as kilopascal or instead bar. For measurements in sound pressure, one pascal is around $94$ decibels of sound pressure level.