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Buoyancy is Imaginary
"Roger Long" wrote in message
... Several months ago, I made this statement during a discussion of stability here. The minor flame war that resulted made it impractical to defend the proposition and it wasn't much fun anyway. While I was away, I had occasion to put together a web site section on the subject of stability and made the subject line the title of the first chapter. If anyone is interested in the technical aspects of what floats their boat with a minimum of math, click: http://www.rogerlongboats.com/Stability.htm My son's former physics teacher reviewed the buoyancy section and pronounced it "Beautifully explained" so it's had some minimum of vetting aside from being basically a written version of a guest lecture I used to present to college students. The last chapter is a brief introduction to the endless foolishness in the Coast Guard stability regulations for sailboats. This recently got me an email from a retired inspector saying basically, "Thank goodness someone finally said something!" Enjoy Way too simplistic, I'm afraid. You seem to attribute buoyancy to gravity alone. WRONG! Let's create a system that has 1/100 Earth gravity. Let's place a 1/100 Earth gravity sphere half full of water and half full of air in outer space. Let's pressurize this sphere to one atmosphere. Let's float a boat in the water. The boat that weighs a ton only weighs 1/100 ton in this sphere but the atmospheric pressure is Earth normal. Therefore the pressure upwards on the boat's hull would be the same as on earth (due to atmospheric pressure) according to your ill-conceived theory. The boat that is already floating 100 times higher than on earth due to its being 1/100 the weight (mass) would be pushed even higher. If your theory were correct this would not be the case. I rest my case. Wilbur Hubbard |
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