Temperature

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Temperature

Temperature (pronunciation: /ˈtɛmp(ə)rətʃər/) is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder.

Etymology

The word temperature comes from the Latin word temperatura, which means "measure of heat". It is derived from the Latin word temperare ("to temper, moderate").

Definition

Temperature is a measure of the average kinetic energy of the particles in a system. It is a fundamental parameter in thermodynamics and it is measurable in units of degrees on the Celsius (°C), Fahrenheit (°F), and Kelvin (K) scales.

Related Terms

  • Thermodynamics: The branch of physical science that deals with the relations between heat and other forms of energy.
  • Heat: A form of energy associated with the movement of atoms and molecules in any material.
  • Kinetic Energy: The energy which a body possesses by virtue of being in motion.
  • Celsius: The scale of temperature in which water freezes at 0° and boils at 100° under standard conditions.
  • Fahrenheit: The Fahrenheit scale is a temperature scale based on one proposed in 1724 by the physicist Daniel Gabriel Fahrenheit.
  • Kelvin: The Kelvin is the base unit of temperature in the International System of Units (SI).

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