Question

Convert Bar to Pascal.

Answer 1

Step 1: Pressure

1. Pressure is defined as the force per unit area.
2. If $F$ is the force applied to a body and $A$ is the area upon which the force is applied, then the pressure can be given as, $P=\frac{F}{A}$
3. The derived unit of pressure is $N{m}^{-2}$.

Step 2: Bar to Pascal

1. One bar can be roughly defined as the atmospheric pressure exerted at an altitude of $111m$ above the sea level at a temperature of $15°C$.
2. Atmospheric pressure is the pressure exerted by the atmosphere through its several layers on earth.
3. As the altitude above the earth increases, the atmospheric pressure decreases.
4. One Pascal can be defined as the one-newton force exerted per unit area.
5. Pascal is the SI unit of pressure.
6. The conversion between bar and Pascal is:

Hence, $1bar={10}^{5}Pa$