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new new new new (id: 972d1e283)

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admin 发表于 2024-10-29 15:05:32 | 显示全部楼层 |阅读模式
本题目来源于试卷: new new new new,类别为 IB物理学

[问答题]
Sometimes people say that w(xw.t f1ghr7aat tpnk7ts447hter is removed from clothes in a spin dryer by centrifugal force throwin4 7t hkp4s7ttng the water outward. What is wrong with this statement?




参考答案:
The problem with the statement is that there is nothing to cause an outward force, and so the water removed from the clothes is not thrown outward.  Rather, the spinning drum pushes INWARD on the clothes and water.  But where there are holes in the drum, the drum can’t push on the water, and so the water is not pushed in.  Instead, the water moves tangentially to the rotation, out the holes, in a straight line, and so the water is separated from the clothes.


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