Pressure
Pressure is the name of the physical quantity having the S.I unit of N/m2 or pascal.

Definition
Pressure is defined as the force applied perpendicular to the surface of an object per unit area. Mathematically, pressure is calculated by dividing the force applied by the area over which it is distributed.

SI Unit
The SI unit of pressure is the pascal (Pa), which is equivalent to one newton per square meter (N/m2). This unit is named after Blaise Pascal, a French mathematician, physicist, and philosopher.

Importance
Pressure plays a crucial role in various aspects of our daily lives. For example, atmospheric pressure determines weather patterns and can affect the behavior of gases. In the field of engineering, pressure is a key factor in designing structures and machines that can withstand different forces.

Applications
Pressure is used in various fields such as meteorology, fluid dynamics, and engineering. Meteorologists use pressure measurements to predict weather patterns, while engineers rely on pressure calculations to design efficient systems and structures.

Conclusion
In conclusion, pressure is a fundamental physical quantity that is essential for understanding various natural phenomena and engineering processes. Its SI unit, the pascal, provides a standardized measure for quantifying pressure in different contexts.