p水=ρ水gh=1.0X10^3X10X0.12=1.2X10^3Pa
F水=p水S=1.2X10^3X40X10^-4=4.8N
F壶=G壶+F水=0.4X10+4.8=8.8N
p壶=F壶/S=8.8/40X10^-4=2.2X10^3Pa