Which of the following units is commonly used for measuring pressure?

• A. m^3
• B. N/m^3
• C. bar
• D. celsius

Answer: (C)

Verified step by step guidance

1. Understand that pressure is defined as force applied per unit area. The general formula for pressure is \(P = \frac{F}{A}\), where \(P\) is pressure, \(F\) is force, and \(A\) is area.
2. Analyze the units given: \(m^3\) is a unit of volume (cubic meters), not pressure.
3. Next, \(N/m^3\) represents force per unit volume, which is not a standard unit for pressure. Pressure requires force per unit area, not volume.
4. The unit 'bar' is a commonly used unit of pressure, where 1 bar is equal to \$10^5\( pascals (Pa), and pascal is the SI unit for pressure defined as \)1\,Pa = 1\,N/m^2$.
5. Celsius is a unit of temperature, so it is unrelated to pressure measurement.