Why pepper separate to detergent?

Pepper separates from detergent due to differences in density and surface tension. When pepper is added to water mixed with detergent, the detergent reduces the surface tension of the water, allowing the pepper to spread out more easily. The pepper, being less dense, floats on the surface, while the detergent molecules disrupt the water's cohesive forces, preventing the pepper from clumping together. This separation illustrates the effects of surface tension and density in mixtures.