“conductivity”的概念、定义、习题解题方法及翻译-物理辞典

单词	conductivity
释义	conductivity 1(thermal conductivity) A measure of the ability of a substance to conduct heat. For a block of material of cross section A, the energy transferred per unit time E/t, between faces a distance, l, apart is given by E/t=λA(T₂- T₁)/l, where λ is the conductivity and T₂ and T₁ are the temperatures of the faces. This equation assumes that the opposite faces are parallel and that there is no heat loss through the sides of the block. The SI unit is therefore J s^-1 m^-1 K^-1. 2(electrical conductivity) The reciprocal of the resistivity of a material. It is measured in siemens per metre in SI units. When a fluid is involved the electrolytic conductivity is given by the ratio of the current density to the electric field strength.
随便看	theodolite theoretical physics theory theory of everything therm thermal capacity thermal conductivity thermal diffusion thermal equilibrium thermal expansion thermal imaging thermal neutrons thermal reactor thermalization thermionic emission thermionic valve thermionics thermistor thermite thermochemistry thermocouple thermodynamic temperature thermodynamics thermoelectricity thermograph

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。