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一端封闭的玻璃管开口向上,管内有一段高为h的水银柱将一定质量的空气封闭在管中,空气柱长为1,这时水银面刚好与管口相齐。如果实验时大气压强为H。问管中空气柱长度满足什么条件时,继续向管内倒入水银,则水银不会流出管外?(见吉林出版社出版的张国华、孙荣祖编“物理题解”中册第94页) 该书解法是:设倒入水银后管内水银柱增加Δh,如图。由玻—马定律得:
The closed glass tube at one end is open upward. There is a section of mercury column with a height of h enclosing a certain mass of air in the tube. The length of the air column is 1, and the mercury surface is exactly aligned with the nozzle. If the experiment atmospheric pressure is H. Asked the tube when the length of the air column to meet what conditions, continue to pour mercury into the tube, the mercury will not flow out of the tube? (See Jilin Publishing House Zhang Guohua, Sun Rongzu “Physics Problem Solution” in the book on page 94) The book solution Is: set into the mercury tube after mercury increase Δh, as shown. By the glass - law of the horse must: