在学习物理学的过程中 ,我们经常遇到一些常数 .物理学中的这些常数分为两类 ,一类为普通物理常数 ,一类为基本物理常数 .普通物理常数是描述宏观物质的普通物理性质的常数 ,如物质的密度、固体的弹性常数、液体物质的压缩系数、气体的粘滞系数、物质的比热、导体的导电率、透? In the process of learning physics, we often encounter some constants. The physics of these constants are divided into two categories, one for the ordinary physical constants, one for the basic physical constants. Ordinary physical constants are described in general macroscopic physical objects Properties of the constants, such as the density of the material, the elastic constant of the solid, the compressibility of the liquid material, the viscosity of the gas, the specific heat of the material, the electrical conductivity of the conductor,