Pressure Difference

Pressure difference refers to the variation in pressure between two points within a fluid or gas. It drives movement, as fluids naturally flow from areas of higher pressure to lower pressure. For example, when you squeeze a balloon, the air inside moves toward areas of lower pressure, causing the balloon to change shape. This concept is essential in many applications, from how your lungs breathe to how water moves through pipes. Essentially, pressure difference creates the force needed to cause fluid motion, with the greater the difference, the stronger the driving force.