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EvC Forum ⇒ Science Forums ⇒ Geology and the Great Flood ⇒ That boat don't float ⇒

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Author Topic:   That boat don't float
Straggler
Member (Idle past 360 days)
Posts: 10333
From: London England
Joined: 09-30-2006

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Message 54 of 453 (520415)
08-21-2009 12:15 PM 		Reply to: Message 53 by iano
08-21-2009 12:12 PM

Re: Let's be resinable
Remember ventilation and poo-disposal characteristics too. Not things to be sniffed at.
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Creationism with a smile.
This message is a reply to:
 Message 53 by iano, posted 08-21-2009 12:12 PM iano has replied
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 Message 58 by iano, posted 08-21-2009 1:30 PM Straggler has not replied
  
Straggler
Member (Idle past 360 days)
Posts: 10333
From: London England
Joined: 09-30-2006

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Message 91 of 453 (520583)
08-22-2009 11:07 AM 		Reply to: Message 90 by RAZD
08-22-2009 10:44 AM

Eureka
Yes I don't really see how we can be discussing buoyancy and boats without discussing Archimedes principle.
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Wiki writes:
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In physics, buoyancy (pronounced /ˈbɔɪ.ənsi/) is the upward force that keeps things afloat. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body. This force enables the object to float or at least seem lighter.
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Buoyancy - Wikipedia
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Type "Archimedes principle" into Google and the first entry that comes up is the Wiki article on buoyancy.
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As RAZD says displacement is the key criteria here. If the weight of the water displaced is not equal to the weight of the boat and it's contents the boat will sink. Thus the shape of the boat, to maximise displacement as weight increases, is absolutely crucial. A simple raft is a desperately poor design with this in mind.
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That is why huge ships are the tapered shape that they are. Obviously.
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The legends goes further and tells that Archimedes was so excited with his discovery that he hopped out of the bath, and rushed naked into the street yelling triumphantly, "Eureka!" "Eureka!"
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Archimedes of Syracuse: The Discovery of Archimedes' Principle
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Edited by Straggler, : No reason given.
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Edited by Straggler, : No reason given.
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Edited by Straggler, : Add Eureka link
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