In measurement, what are the two components expressed in?

In measurement, the two essential components are a value and a unit. The value represents a specific quantity, such as a number that indicates how much or how many of something is being measured (for example, 5 for length, 20 for temperature, etc.). The unit functions as a standardized reference that provides context to the value, indicating what is being measured - for instance, meters, kilograms, or degrees Celsius. Without the unit, the value alone would be meaningless because it would lack the necessary context; for example, knowing it is 5 is insufficient without understanding whether it refers to 5 meters, 5 kilograms, or something else entirely. This duality ensures clarity and precision in communication about measurements across different fields and applications.