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力、热学综合题是每年物理高考的必考内容之一。因此,在高三复习备考中,绝不能忽视力、热学综合题的训练。下面以高考题作例析。一、静力学与热学的综合问题例1．如图1所示,一个上下都与大气相通的直圆筒,内部横截面的面积S=0.01m~2,中间用两个活塞A与B封住一定质量的理想气体,A、B都可沿圆筒无摩擦地上、下滑动,但不漏气,A的质量可不计,B的质量为M,并与一劲度系数K=5×10~3N/m的较长的弹簧相连,已
The combination of force and thermal problems is one of the mandatory examination contents for the annual physical entrance exam. Therefore, in the preparation for examination in the third year, we must not neglect the training of the comprehensive problems of force and heat. The following exam questions are given as examples. First, the comprehensive problem of statics and thermals As shown in Fig.1, a straight cylinder with both the upper and lower atmospheres communicating with the atmosphere has an internal cross-sectional area of S=0.01m~2. Two pistons A and B are used to seal the ideal gas of a certain quality. Both A and B can be used. The cylinder slides up and down without friction, but does not leak gas. The mass of A is negligible. The mass of B is M, and it is connected to a long spring with a stiffness coefficient of K=5×10~3N/m.