解释浮力应用的真实问题

设土壤密度计的重量为g，截面积为s，总体积为v，则:

G = ρ wine gV row = ρ wine g(V-4S) ①

G = ρ水gV row = ρ水g(V-6S) ②

G = ρ硫gV row = ρ硫g(V-7.6S)③

从①和②: ρ酒g (v-4s) = ρ水g(V-6S): v = 14S4。

从②和③: ρ水g (v-6s) = ρ硫g (v-7.6s) ρ。

④代入⑤，⑤硫= ⑤水(v-6s)/(v-7.6s) = ⑤水8s/6.4s = 1250kg/m 3。