∵p=ρgh,
∴ρ=
pA |
ghA |
2.4×103Pa |
10N/kg×0.3m |
∴,液体对容器底的压强p=ρgh=0.8×103kg/m3×10N/kg×0.4m=3.2×103Pa.
(2)根据ρ=
m |
V |
G液=m液g=ρ液V液g=ρ液Shg=0.8×103kg/m3×100×10-4m2×0.4m×10N/kg=32N,
容器对桌面的压力:
F=G液+G容+G=32N+5N=37N,
容器对桌面的压强:
p′=
F |
S |
37N |
100×10−4m2 |
故答案为:3.2×103;3.7×103.