Measurement
The subject area Measurement deals with the methodology for measuring temperature, speed, distance, mass, and other energy phenomena. An example of the essential nature of measurement is heat as described by the zeroth law of thermodynamics, which is so called because it is required in order for the other laws to apply effectively (see Thermodynamics, 1939). This states that if two systems are both in thermal equilibrium with a third system, then they must be equilibrium with each other. Thus in practical terms they will all have the same temperature. Without this assumption, the measurement of temperature would not be possible and thus studies of heat and heat flow would have no validity.
Milestones in energy measurement ...
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