Question

Express bar in terms of Pascal.

Answer 1

1. Pressure: It is the force acting normally on a body per unit area of surface.
2. The S.I. unit of pressure is newton per square. meter, denoted by ${\mathrm{Nm}}^{-2}$ which is the same as pascal, denoted by $\mathrm{Pa}$.
3. One pascal is the pressure exerted on a surface of area $1{\mathrm{m}}^2$ by a normal force of $1\mathrm{N}$
4. Hence, $1\mathrm{Pa}=1{\mathrm{Nm}}^{-2}$
5. Another unit of pressure is bar, such that $1\mathrm{bar}={10}^5\mathrm{Pa}$