h a l f b a k e r yNot so much a thought experiment as a single neuron misfire.
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This would be a ketchup bottle with a sling-apparatus, with the mouth of the bottle pointing away from the axis of rotation.
For that hard-to-get last few blobs of ketchup, simply swing the bottle around ala David-and-Goliath, bring to a halt and uncap.
(?) Quote
http://www.philly.c...n_baer/10527360.htm
Other attributions are to Ogden Nash and, for some reason, e.e.cummings [Basepair, Mar 11 2005]
NASA on ketchup with Richard Armour
http://science.nasa..._elastic_fluids.htm
Shear thinning. [baconbrain, Mar 11 2005]
[link]
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Comments lost to October 2004 disk crash. |
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I remember the idea, though. Creates a funny image. + |
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[flashes back to tragic incident] |
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Just make sure the cap is on tight. |
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<pedant> The centripetal force in this set-up is the tension in the sling, which *is* needed to counteract the centrifugal force that will drive the ketchup into the neck of the bottle. This centrifugal force is simply inertia, but the term has recently come under criticism. The problem seems to be that most folks think "centrifugal force" is a force like gravity, which irritates pedants. Pedants insist it is simply inertia relative to a center of rotation, but they somehow have decided to throw the term out entirely, rather than defining it simply. Damn those pedants! </pedant> |
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Just shake the bottle a few times, then take off the cap. Ketchup is thixotropic, which refers to its habit of changing from a solid to a liquid when disturbed. |
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"Shake and shake the ketchup bottle. None'll come; then a lot'll." -- Ogden Nash |
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I thought it didn't sound very Ogden
Nashish. Apparently it is by Richard
Willard Armour (link), though often
attributed to Nash. |
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[Basepair] Thank you. I shoulda looked it up. A pedant on his own petard. |
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It would take a very pedantic
Englishman to point out that a petard is
actually a sort of bomb used to breach a
castle wall or gate, and that one cannot
therefore really be 'on' it in a
meaningful sense. I am that pedantic
Englishman :-) |
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Dang! I knew that, too. Thanks again. |
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When you say "Dang!", I think you
mean...no, never mind. :-) |
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Hey, I didn't know that when you annotate something, it flies back on to the home page for everyone's viewing pleasure. This ketchup on a sling is a pretty old idea. |
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That seems like a lot of work for a couple of dollops of ketchup... |
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What aboot senior citizens??? |
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