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一、容器静止或匀递运动时求被封闭气体的压强的方法(1)连通器原理:在连通器中,同一液体(中间液体不间断)的同一水平液面上的压强是相等的.例1(上海高考)如图1所示,U形管封闭端有一部分气体被水银封住,已知大气压为p_0,则被封闭部分气体的压强p(以汞柱为单位)为().A.p_0+h_2 B.p_0-h_1C.p_0-(h_1+h_2)D.p_0+h_2-h_1图1解析取最低液面为研究对象,列出平衡方程.选右
A method for obtaining the pressure of a closed gas when the vessel is stationary or in a moving motion (1) The principle of a connected vessel: In a connected vessel, the pressure of the same liquid (intermediate liquid is uninterrupted) on the same level is equal. 1 (Shanghai college entrance examination) As shown in Figure 1, a part of the gas at the closed end of the U-shaped pipe is sealed with mercury. The known atmospheric pressure is p_0, and the pressure p of the enclosed gas (in terms of mercury) is (). A .p_0+h_2 B.p_0-h_1C.p_0-(h_1+h_2)D.p_0+h_2-h_1 Figure 1 Analyze the minimum fluid level for the study and list the equilibrium equations. Select Right