Heat and Thermal Properties Questions
Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C, the Fahrenheit scale, and the Kelvin scale, the latter being used predominantly for scientific purposes. The kelvin is one of the seven base units in the International System of Units.
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