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2026年上学期雅礼集团八下期中检测试卷物理科目

  • 2026-04-29 12:33:32
2026年上学期雅礼集团八下期中检测试卷物理科目
总结：
雅礼集团刚结束的八上期中物理考试，物理的难度是比较的大的，基础知识点全部的覆盖，难点也是有了侧重，主要还是考察了孩子们的计算和逻辑推理的能力。接下来讲讲填空的压轴的第16题和计算压轴的第23题。
一。填空压轴：
填空压轴的前两问都是结合图像的问题，在没有添加桌腿的时候就是单个物体B对于地面的压强的，这里利用固体压强公式就可以计算出物体B的重力。第三问就是比较的巧一些，主要是在于桌腿和桌面的材料是一样的，这里就是一个关键的突破，由这个点需要计算出物质密度的大小，其次就是利用固体压强的计算公式算出变化量计算出加入桌腿的一个重力，后面就再利用质量密度公式结合体积公式计算出桌腿的高度。最后，利用柱体压强的切割结合固体压强的变化量来求出截去的高度，从而就可以计算剩余的桌腿的高度。
二。计算压轴：
计算压轴的23题的前两问是送分的题目，主要是在于第三问。第三问在于：
1.将A.B.C三个物体放入甲中，对于A来讲液体是没有将其全部淹没的，这是一个很重要的点，孩子们基本会被这个点迷惑。从而可以判断在将物体C放入时候液体的深度的变化量是最大，利用液体压强公式可以求出液体压强的最大变化量。
2.将物体放入乙上，先分别计算物体质量的大小，再利用重力公式和固体压强公式就可计算固体压强的变化量，可以得出在放入物体B得到固体压强的最小变化量。
3.利用比值比例问题
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  1. CONNECT:[ UseTime:0.000397s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000703s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000280s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000282s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000530s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000567s ]
  8. SELECT * FROM `article` WHERE `id` = 485938 LIMIT 1 [ RunTime:0.000319s ]
  9. UPDATE `article` SET `lasttime` = 1777482843 WHERE `id` = 485938 [ RunTime:0.007193s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000282s ]
  11. SELECT * FROM `article` WHERE `id` < 485938 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000468s ]
  12. SELECT * FROM `article` WHERE `id` > 485938 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003882s ]
  13. SELECT * FROM `article` WHERE `id` < 485938 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004433s ]
  14. SELECT * FROM `article` WHERE `id` < 485938 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002569s ]
  15. SELECT * FROM `article` WHERE `id` < 485938 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001735s ]
0.094155s