设杯截面积为s,则依题有:
水压:ρ g h = p1
水的质量:ρ V=ρ s h = m1
桌面压力:(m1 + m2)g/s = p2
代入:p =1000,g =10,h =10*10^-2,m1 = 200*10^-3,p2 =3*10^3
解得:水对杯底压强:p1 =1000Pa,杯质量m2 = 2/5Kg
设杯截面积为s,则依题有:
水压:ρ g h = p1
水的质量:ρ V=ρ s h = m1
桌面压力:(m1 + m2)g/s = p2
代入:p =1000,g =10,h =10*10^-2,m1 = 200*10^-3,p2 =3*10^3
解得:水对杯底压强:p1 =1000Pa,杯质量m2 = 2/5Kg