一道高考题的简捷解法

题目:如图1所示,有一个直立的气缸,气缸底到气缸口的距离为L0厘米,用一厚度和质量均可忽略不计的刚性活塞A,把一定质量的空气封在气缸内,活塞与气缸间的摩擦可忽略.

Base Stress of the Opened Bottom Cylinder Structures

The base stress of the opened bottom cylinder structure differs greatly from that of the structure with a closed bottom. By investigating the inner soil pressure on the cylinder wall and the base stress of the cylinder base, which were obtained from the model experiments, the interactions among the filler inside the cylinder, subsoil and cylinder are analyzed. The adjusting mechanism of frictional resistance between the inner filler and the wall of the cylinder during the overturning of the cylinder is discussed. Based on the experimental study, a method for calculating the base stress of the opened bottom cylinder structure is proposed. Meanwhile, the formulas for calculating the effective anti-overturning ratio of the opened bottom cylinder are derived.

1996年高考物理第25题图象解说

１９９６年高考物理第２５题图象解说南京师大附中周久璘１９９６年高考物理试卷第２５题是一道设计新颖、独具匠心、难度较大的题，试题的标准答案较为繁琐，似乎太数学化了，物理意义欠明朗．本文从物理角度并借助户一Ｖ图象分析该题，进而给出该题较为简明的解答．题目...

1996年高考物理第25题的答案漏掉了一种情况

1996年高考物理试题第25题是一道立意新、变化巧、难度大、能力要求高的好题（其难度不亚于最后一题）,但参考答案的解法较繁,不易看懂,而且少讨论了一种情况,即当H0】L0时（题中未给出L0与H0大小的关系,所以有此可能）活塞上方留不住水银,稍微倒上水银,水银就会流走的情况。下面用另一种解法作全面讨论。