http://net-ushky.livejournal.com/ ([identity profile] net-ushky.livejournal.com) wrote in [community profile] engineering_ru 2014-12-18 08:46 pm (UTC)

озадачили. ну да, архимедова сила и третий закон ньютона. но, однако, прекрасная задача!
и все-таки другой шарик пикантнее сделать из эбонита!.. )
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