Which of the following is a standard unit of measurement for pressure in the International System of Units (SI)?

• A. watt (W)
• B. pascal (Pa)
• C. meter (m)
• D. joule (J)

Answer: (B)

Verified step by step guidance

1. Understand that the International System of Units (SI) defines standard units for various physical quantities, including pressure.
2. Recall that pressure is defined as force applied per unit area, mathematically expressed as \(P = \frac{F}{A}\), where \(P\) is pressure, \(F\) is force, and \(A\) is area.
3. Identify the SI unit of force, which is the newton (N), and the SI unit of area, which is the square meter (\(m^2\)).
4. Combine these units to express pressure in SI units: \(\text{pressure unit} = \frac{\text{newton}}{\text{meter}^2} = \text{pascal (Pa)}\).
5. Recognize that watt (W) is a unit of power, meter (m) is a unit of length, and joule (J) is a unit of energy, so they are not units of pressure.