7.85x10³kg/m³等于多少g/mm³

问题描述:

7.85x10³kg/m³等于多少g/mm³

7.85x10³kg/m³ = 7.85x10³x10³g/(10³mm)³
= 7.85x10^6g/10^9mm³
= 7.85x10^(-3)g/mm³
= 0.00785g/mm³