论文部分内容阅读
下面是某市一道中考模拟题:题如图,弹簧测力计下挂一个横截面积为20cm~2的金属圆柱体,圆柱体的下表面恰好与底面积为100cm~2的液面接触,如图甲所示,若圆柱体向下移动8cm,静止时弹簧测力计的示数是11.6N,若圆柱体有20cm 长浸入液体中.静止时弹簧测力计示数是9.2N;若圆柱体从弹簧测力计上取下并投入液体中.圆柱体沉至容器底并没在液体中(整个过程中液体没有
The following is a city entrance exam simulation questions: Question Figure, the spring dynamometer hangs a metal cylinder with a cross-sectional area of 20cm~2. The bottom surface of the cylinder is exactly in contact with the liquid surface with a bottom area of 100cm~2. As shown in Fig. A, if the cylinder is moved 8cm downwards, the number of spring dynamometers shown at rest is 11.6N. If the cylinder is 20cm long, it is immersed in liquid. The number of spring dynamometers at rest is 9.2N. The cylinder is removed from the spring dynamometer and put into the liquid. The cylinder sinks to the bottom of the container and is not in the liquid (the liquid is not