(1)∵p=ρgh,
∴hA=
=pA
ρ水g
=0.1m;980Pa 1×103kg/m3×9.8N/kg
(2)甲容器装水重:
G甲=ρ水V水g
=1.0×103kg/m3×0.01m2×(0.1m+0.3m)×9.8N/kg
=39.2N,
甲容器对水平地面的压力:
F=G甲+G容=39.2N+2N=41.2N;
(3)小芳同学设计的方法可行,
hB=
=pB
ρ酒g
=0.125m980Pa 0.8×103kg/m3×9.8N/kg
由题知:ρ水g(h甲-h)=ρ酒精g(h乙+h)
即:1×103kg/m3×9.8N/kg×(0.4m-h)=0.8×103kg/m3×9.8N/kg×(0.425m+h)
解得:h=0.03m.
答:(1)A点离液面的距离为0.1m;
(2)甲容器对水平地面的压力为41.2N;
(3)小芳同学设计的方法可行,该方法中的深度为0.03m.