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单词 absolute zero
释义
absolute zero
Physics

  • Zero of thermodynamic temperature (0 kelvin) and the lowest temperature theoretically attainable. It is the temperature at which the kinetic energy of atoms and molecules is minimal. It is equivalent to −273.15°C or −459.67°F. See also zero-point energy; cryogenics.

Astronomy

  • The zero point on the thermodynamic temperature scale, equal to −273.15° Celsius or −459.67° Fahrenheit. It is often stated that all motion of atoms and molecules ceases at absolute zero, but in fact a small amount of energy (the zero-point energy) still remains. Absolute zero is the coldest temperature theoretically possible, but it can never be attained in practice.

Chemistry

  • Zero of thermodynamic temperature (0 kelvin) and the lowest temperature theoretically attainable. It is the temperature at which the kinetic energy of atoms and molecules is minimal. It is equivalent to –273.15°C or –459.67°F. See also zero-point energy.

Chemical Engineering

  • The lowest possible thermal energy state of a material. This corresponds to 0 K.

Electronics and Electrical Engineering

  • The temperature at which the energy of random motion of the particles in a system at thermal equilibrium is zero. It is the lowest temperature theoretically possibly and is the zero of the thermodynamic temperature scale.

Geology and Earth Sciences

  • See kelvin scale.
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