QUANTITY单位SI(cm)LENGTH长度1m1000mm100FORCE力f1N1N1MASS质量1kg0.001tonne100TIME1s1s1STRESS压强550Pa(N/m2)0.00055Mpa(N/mm2)0.055ENERGY能量1J1000mJTEMPERATURE温度1℃1℃重力加速度9.8m/s/s9800mm/s/sTHERMOCONDUCTIVITY导热系数390W/m/K390mW/mm/KHEATCONVENCTIONCOEFFICIENT热对流系数30W/m2/K0.03mW/mm2/KSPECIALHEAT比热容880J/kg/K880000000mJ/tonne/KELASTICMOLDULUS弹性模量3.88E+11Pa388000MPaDENSITY密度7.85E+03kg/m37.85E-09tonne/mm3注k卡尔文等同于摄氏度SISI(mm)SISI(MM)SI(cm)CM3.28084ft39.37008inN0.225lbf0.225lbf100kg0.06852slug8.859154lbfs2/ins1s1sN/cm/cm0.020885lbf/ft20.079768psi(lbf/in2)0.738263ftlbf8.859154inlbf1℃1℃225.3944But/(ft·h·°F)18.78287But/(in·h·°F)5.283309Btu/(ft2·h·°F)0.03669But/(in2·h·°F)0.210184But/(lb·°F)0.210184But/(lb·°F)8.1E+09lbf/ft256272661psi(lbf/in2)100kg/cm315.229slug/ft34.24E+09lbfs2/in4USUNIT(FT)USUNIT(INCH)USUNIT(FT)USUNIT(INCH)