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Re: Hand assisted laparoscopy From: Cheri Van Hoover (cherivh@home.com) Sat Apr 29 23:30:30 2000 Messages sorted by: [ date ][ thread ][ subject ][ author ] Next message: mark decker: "Re: external cephalic version" Previous message: Jim Connerth: "Re: external cephalic version" Maybe in reply to: RModugno@aol.com: "Hand assisted laparoscopy" DoctorJoe@aol.com wrote: > In a message dated 4/29/00 10:34:30 AM, cherivh@home.com writes: > > >My understanding is that the tower started to lean almost immediately after > >construction was complete. My husband, who keeps up with such things, > >says that > >it was definitely already leaning when Gallileo performed his experiment. > > He > >also says that the experiment failed, as there was about a 0.5 second delay > >between the impacts of the two balls. This failure is attributed to air > >friction. Gallileo was aware of the failure and attributed it correctly. > > Hmmmm. Did they know about air friction then? Or was he FUDGING RESEARCH!?! Well, here's the reference: Galileo's Daughter: A Historical Memoir of Science, Faith, and Love by Dava Sobel. Published by Walker & Co., 1999. We went and heard this author at the California Academy of Sciences last year. Great speaker, fascinating subject. The book is sitting here, waiting for me to find time to read it. On pages 19-20, she talks about this experiment and Galileo's arguments in defense of his position (that greater mass does not make for greater speed of descent). She says "The larger ball, being less susceptible to the effects of what Galileo recognized as air resistance, fell faster, to the great relief of the Pisan philosophy department." As my husband points out, air resistance was a readily understandable concept to people who lived in the elements, rode horses, or simply moved an arm through the air. Hair and clothing can be observed to move, pressure can be felt against the skin, etc. So I guess you could call it fudging, but at least he did freely acknowledge the fact that the balls hit at different times, even though this opened him up to enormous criticism by the Aristotelians at his university. Could have been a lot worse, I suppose... -- Cheri Van Hoover, CNM San Francisco, CA Next message: mark decker: "Re: external cephalic version" Previous message: Jim Connerth: "Re: external cephalic version" Maybe in reply to: RModugno@aol.com: "Hand assisted laparoscopy"

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