Question

The fluid pressure of the atmosphere is measured in _____. This is equivalent to ______Pascal

• A. $\mathrm{bar}$
• B. $100,000$

Answer 1

Fluid pressure:

1. The measurement of the force per unit area on an object in the fluid or on the surface of a closed container is known as fluid pressure.
2. The formula to calculate fluid pressure is, $\mathrm{P}=\mathrm{\rho }\times \mathrm{g}\times \mathrm{h}$, where $\mathrm{\rho }$ is the density of the liquid, $\mathrm{g}$ is the acceleration of gravity, and $\mathrm{h}$ is the height of the fluid.
3. The measurement of fluid pressure takes place in $\mathrm{bar}$
4. The $\mathrm{bar}$ is not the International System of Units (SI) of pressure.
5. The SI unit of pressure is Pascals ($\mathrm{Pa}$)
6. $1\mathrm{bar}$ is defined as exactly equal to $100,000\mathrm{Pa}$ ($100\mathrm{kPa}$)
7. Pascal is equal to one Newton per square meter ($\mathrm{N}/{\mathrm{m}}^2$)

Therefore, the fluid pressure of the atmosphere is measured in $\mathrm{bar}$. This is equivalent to $100,000$ Pascal