👉 Incompressible refers to a substance that cannot flow or expand under its own weight. In other words, it does not change its volume when displaced without changing its shape. This property is often used in physics and engineering contexts where mass and volume are interchangeable, such as in the study of fluids. For example, the Earth's atmosphere is considered incompressible because it can support a large amount of air while also being able to expand or contract under pressure due to weather conditions. Similarly, air in
