We often think of pressure as a static measurement—checking tire pressure or monitoring blood pressure—but in the physical world, pressure is rarely about the number itself. It is about the relationship between two numbers. It is the difference between high and low that creates motion, energy, and force.
This principle applies to:
Fluids (gases and liquids) always flow from regions of high pressure to regions of low pressure . The greater the difference, the faster the flow. What Is Pressure Difference
:
Generally, a larger pressure difference between two points results in a higher flow rate, though this is also affected by resistance (like pipe size or friction). Measurement: It is measured in Pascals (Pa) in the SI system, though other units like (pounds per square inch) or are common depending on the industry. 2. Common Formulas We often think of pressure as a static