Cohesion refers to the degree to which the elements of a module or system work together as a whole, enhancing its functionality and maintainability. High cohesion typically results in more robust, understandable, and reusable code or systems, as each component is focused on a single task or closely related tasks.
The curvature of liquids is a phenomenon that arises due to surface tension, causing liquid surfaces to form into shapes that minimize surface area, such as spheres in droplets. This curvature is crucial in understanding capillary action, the behavior of bubbles, and the formation of menisci in containers.