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Three tennis balls

 

作者: Martin Gardner,  

 

期刊: The Physics Teacher  （AIP Available online 1998）
卷期: Volume 36, issue 6  

页码: 343-343

 

ISSN:0031-921X

 

年代: 1998

 

DOI:10.1119/1.1527613

 

出版商: American Association of Physics Teachers

 

关键词: circumference;tennis ball

 

数据来源: AIP

 

摘要:

Without making any measurements, can you prove that the height of a can of tennis balls is less than the circumference of a ball?

 

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