Unless you’re talking about the David Bowie song, understanding that something is under pressure requires some precise measurement. However, in measuring pressure, there are many units that must be taken into consideration. But why? Why do there need to be so many units in order to measure one thing? To understand that, it’s important to understand what pressure is.
What is Pressure?
As an equation, pressure is equal to the force divided by the area. In other words, it’s the force applied when considering the area over which that force is applied.
What can be Measured?
Once you realize that the measurement of pressure involves area, you can begin to see where the confusion starts. Think about all of the different measurements that humans have come up with for measuring a given space. This doesn’t just refer to the difference between metric and imperial units. Measuring an area of land is often different from measuring a volume of water or a cloud of a gas.
What are the Common Measurements?