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1设计思路利用天平和溢水杯来完成演示实验,将装满水的溢水杯放在已调节好的天平的左盘上,通过加减砝码和移动游码使天平平衡。向溢水杯中放入物体,同时部分水从溢水杯口排出。若天平仍平衡,说明放入的物体重量和被它排开的水重量相等。若天平左盘下沉,说明放入的物体重量大于被它排开的水重量;若天平右盘下沉,说明放入的物体重量小于被它排开的水重量。2实验器材溢水杯、小药瓶(配沙子)、托盘天平、烧杯等。
1 Design Ideas Use the balance and overflow cup to complete the demonstration experiment. Place the overflow cup filled with water on the left dial of the adjusted balance and balance the balance by adding or subtracting weights and moving the tour code. Place an object into the overflow cup while some water is drained from the overflow cup. If the balance is still balanced, it means that the weight of the object placed is equal to the weight of the water that is being discharged. If the left plate of the balance sinks, it means that the weight of the object placed is greater than the weight of the water that has been placed in it; if the right plate of the balance sinks, it means that the weight of the object placed is less than the weight of the water that was placed in it. 2 laboratory equipment overflow cups, small bottles (with sand), tray balances, beakers and so on.