Slinky drop physics(blogs.discovermagazine.com)2 points·by jasonostrander·15 ปีที่แล้ว·0 commentsblogs.discovermagazine.comSlinky drop physicshttp://blogs.discovermagazine.com/badastronomy/2011/09/26/slinky-drop-physics/?utm_source=feedburner0 commentsPost comment—