A centrifuge is a machine that spins samples at high speeds to separate substances based on their density. By using centrifugal force, it can separate liquids from solids or different liquids from each other. This process is commonly used in laboratories, hospitals, and even in the food industry to purify or concentrate materials. In a medical setting, centrifuges are often used to separate blood components, such as red blood cells, plasma, and platelets. This helps doctors analyze samples more effectively. Additionally, centrifuges play a crucial role in research, helping scientists study cells, proteins, and other biological materials in detail.