Question

质量是50g的空瓶子,装满水时总质量是1300g,装满密度为0.8×10^3kg/m^3的煤油时,

Answer 1

m水=1300g-50g=1250g=1.25kgV水=m水/ρ水=1.25kg/1000kg/m³=1.25×10^-3m³根据题意知,V油=V水=1.25×10^-3m³m油=ρ油V油=0.8×10^3kg/m³×1.25×10^-3m³=1kg=1000g其总质量：m=m油+m瓶=100...