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The revolving circle

 

作者: Martin Gardner,  

 

期刊: The Physics Teacher  （AIP Available online 1998）
卷期: Volume 36, issue 9  

页码: 543-543

 

ISSN:0031-921X

 

年代: 1998

 

DOI:10.1119/1.1527623

 

出版商: American Association of Physics Teachers

 

关键词: concentric circles;3

 

数据来源: AIP

 

摘要:

Make a top with a white cardboard circle and a pencil. Draw a black circle on the disk. Can you guess what you will see when the top is spun?

 

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