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我在講授初中物理學中的阿幾米德定律時,給學生們做了一個補充實驗,實驗的用具很簡單,能說明的問題很多,對於幫助學生鞏固所學的新知識效果很好。現在把它介紹在下面。實驗的用具是:廣口瓶、軟木塞、細橡皮管、細玻璃管、大量筒、天平、鉛塊、燒瓶架子、小鐵夾。先按下列步驟把用具裝置起來: 1.在適合於廣口瓶瓶口大小的软木塞上鑽 兩個孔,將彎曲的和直的玻璃管各一支分别插入孔中,在直的玻璃管上緊緊地套上一根細橡皮管,然後將软木塞緊塞住廣口瓶,並在瓶底下繫上一塊重量適宜的鉛塊(如图1)。
When I was teaching the law of middle school in junior middle school physics, I gave the students a supplementary experiment. The experimental apparatus was very simple. There were a lot of problems that could be explained and it was good for helping students to consolidate the new knowledge they learned. Now introduce it below. Experimental equipment is: wide mouth bottles, cork, thin rubber tube, thin glass tube, a large number of tubes, scales, lead pieces, flask shelves, small iron clip. First use the following steps to set the appliance up: 1. Drill two holes in a cork suitable for the width of the mouth of the jar. Insert each of the curved and straight glass tubes into the holes, Tightly put a thin rubber tube, and then plug the cork tight jar, and under the bottom of the bottle tied a suitable weight of lead (Figure 1).