When a fluid is at rest, there is an exertion of a force that is perpendicular to any surface in contact with it. This force is known as fluid pressure and it is due to the continuous, random motion of molecules. Furthermore, the measurement of fluid pressure takes place in Pascals (Pa).

An important point to note is that one Pascal is equal to one Newton per square meter (N/m2). Furthermore, fluid pressure is independent of the fluid’s mass. However, its calculation can take with the density and height of the fluid.

Now, one must set up the equation. Furthermore, the equation for this pressure is independent of the liquid’s volume or mass. Moreover, fluid pressure is the product of the liquid’s density, the height of the liquid that is above the object, and gravity.

The height of the liquid is the largest variable in the equation because the gravity and liquid densities are fixed. Furthermore, the fluid pressure formula or equation reads as Pfluid = ρgh, where ρ refers to the liquid’s density, g refers to the acceleration of gravity, and h refers to the liquid’s height (or fluid’s depth).

Next comes the multiplication of the variables. In order to solve the equation, one must take the product of the three variables. For this purpose, a calculator can be used.

For example, consider the case of a fluid with a density of (1.08 x 103 kg/m3) and it was 5.00 m high. Now, one would multiply (1.08 x 103 kg/m3) x 9.81 m/s2 (acceleration of gravity on Earth) x 5.00 m. Finally, one would attain the answer of 5.30 x 104.

Now one must analyze the results. Furthermore, one must make sure that the results add up logically. Moreover, there must not be reading for negative fluid pressure.

One must also compare different measurements in order to check whether they follow the expected trends. For example, more dense liquids, at the same height, will exert more pressure. Moreover, there will be the exertion of more pressure by the same liquid when the height is higher.

Water is certainly denser than oil. As such, one can expect exertion of more fluid pressure by water in comparison to oil at the same height.

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