meta user
network profile
| bio | website | |
|---|---|---|
| location | Belgium | |
| age | ||
| visits | member for | 2 years, 6 months |
| seen | yesterday | |
| stats | profile views | 581 |
"I would never die for my beliefs because I might be wrong."
-- Bertrand Russell
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Nov 13 |
revised |
What condition is fulfilled by the path of a mass sliding down a lumpy hill? added 165 characters in body; deleted 11 characters in body; deleted 2 characters in body |
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Nov 13 |
comment |
What condition is fulfilled by the path of a mass sliding down a lumpy hill? I think what Marek wants to say is that if you want an analytical solution, you'll have to specify the landscape (and the starting point), for instance as a function $z=f(x,y)$ or $g(x,y,z)=0$. |
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Nov 13 |
comment |
What condition is fulfilled by the path of a mass sliding down a lumpy hill? You're right. I have been sloppy. In that case, I think the only thing that is being extremized must be the classical action for the problem. |
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Nov 13 |
answered | What condition is fulfilled by the path of a mass sliding down a lumpy hill? |
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Nov 13 |
answered | Why can't the outcome of a QM measurement be calculated a-priori? |
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Nov 13 |
revised |
What are some scenarios where FTL information transfer would violate causality? deleted 2 characters in body |
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Nov 13 |
answered | What are some scenarios where FTL information transfer would violate causality? |
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Nov 13 |
awarded | Supporter |
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Nov 13 |
comment |
Why don't spinning tops fall over? @j.c. The ice skater is a classic, but you haven't explained what happened without using the magic words "conservation of angular momentum". You just described it. I would like to explain it with something that is a little more fundamental, like action-reaction. |
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Nov 13 |
comment |
Why don't spinning tops fall over? I fully agree, David. Kind of reminds me of the Feynman video about magnets that is circulating. As Feynman says, there is a point where trying to explain something to a layman without the math is "cheating" him. But, I always try to go as far as possible. |
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Nov 13 |
awarded | Editor |
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Nov 13 |
revised |
Is quantum entanglement mediated by an interaction? added 1 characters in body |
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Nov 12 |
awarded | Teacher |
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Nov 12 |
comment |
Why don't spinning tops fall over? I was not aware of that. I just discovered the site through scienceblogs.com/principles/2010/11/… . Many of the questions I've seen are asked by persons with no background in math and or physics. And as Chad is aiming to answer questions with as few technicalities as possible, I thought my question was relevant. |
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Nov 12 |
answered | Why don't spinning tops fall over? |
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Nov 12 |
answered | Is quantum entanglement mediated by an interaction? |
