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一个题目往往有多种解法,用不同的正确解法求出一题目的答案,可谓殊途同归。请看下面这道题目: 容积为2立方米,高为1米的容器,盛满某种液体,所盛液体重为15680牛。求容器底所受液体的压强,(不计容器厚度) 解法一 液体的质量 m=G/g=15680牛/9.8牛/千克=1600千克。 液体的密度 ρ=m/V=1600千克/2米~3=0.8×10~3千克/米~3。 液体对容器底的压强 P=ρgh =0.8×10~3千克/米~3×9.8牛/千克 ×1米 =7840帕。
A problem often has multiple solutions. Using different correct solutions to solve a problem’s answer can be said to be the same. Please look at the following topic: A container with a volume of 2 cubic meters and a height of 1 meter is filled with a certain liquid, which holds a weight of 15,680 cows. Calculate the pressure of the liquid at the bottom of the vessel (excluding the thickness of the vessel). Solution 1 The mass of the liquid m=G/g=15,680 N/9.8 N/kg=1,600 Kg. The density of the liquid ρ=m/V=1600 kg/2m~3=0.8×10~3 kg/m~3. The pressure of the liquid to the bottom of the vessel P = ρgh = 0.8 × 10 ~ 3 kg / m ~ 3 × 9.8 N / kg × 1 m = 7840 Pa.