Pressure, denoted as p, is defined as the force applied per unit area. It is commonly measured in units such as pascals (Pa), atmospheres (atm), or pounds per square inch (psi). Pressure can be found in various contexts, including gases, liquids, and solids, and plays a crucial role in many scientific and engineering applications. In fluids, pressure increases with depth due to the weight of the fluid above. This principle is essential in understanding phenomena such as hydrostatic pressure in liquids and the behavior of gases in atmospheres. Pressure also influences weather patterns and is a key factor in thermodynamics.