Question

小明买了一瓶矿泉水,如图所示放在水平地面上,瓶上

Answer 1

500ml=500cm^3,p(rou)=m/V,m水=pV=1g/cm^3×550cm^3=550g,所以m总=m水＋m瓶＝20g 550g=570g=0.57kg,G=mg=10×0.57=5.7N,P=F/S=G/S=5.7/10×10^-4=5.7×10^3 Pa纯手打完整过程,