Some science question about ping pong in a train

Started Feb 24, 2012 | Discussion thread
novetan
Senior MemberPosts: 1,556
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Re: Some science question about ping pong in a train
In reply to GordonBGood, Feb 24, 2012

Thanks all. But can it be explained in layman's language, or all above replies already the simplest form?

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David :

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