已知：h1=20cm=0.2m，h2=14cm=0.14m，p=1000千克/米³求：P解：P=hpg=(h1-h2)pg=(0.20-0.14)x1000x10=600Pa
压强是：p=ρgh=1.0×10³×10×(0.2-0.14)Pa=600Pa
