Blaise Pascal
Explanation
Pressure is a derived physical quantity defined as the force applied perpendicular to the surface of an object per unit area. In the International System of Units (SI), specific names are assigned to certain derived units to honor scientists who made significant contributions to the respective fields.
Analysis of Options:
- Blaise Pascal: The SI unit of pressure is the Pascal (Pa). It is named after the French mathematician and physicist Blaise Pascal to honor his extensive work in hydrostatics and fluid mechanics. Mathematically, one Pascal is equivalent to one Newton per square meter ($1 \text{ Pa} = 1 \text{ N/m}^2$).
- Isaac Newton: The SI unit of Force is the Newton (N), named after Isaac Newton for his laws of motion.
- Archimedes: While Archimedes is renowned for the principle of buoyancy, there is no SI unit named after him.
- Galileo Galilei: Galileo is associated with the unit "Gal" (used for acceleration in geodesy), but this is a CGS unit, not an SI unit, and it does not measure pressure.
Key Takeaway:
The SI unit of Pressure is the Pascal (Pa), named after Blaise Pascal. It is a derived unit expressed in base units as $\text{kg} \cdot \text{m}^{-1} \cdot \text{s}^{-2}$.