meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 7 months |
| seen | 22 hours ago | |
| stats | profile views | 17 |
ψ
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May 7 |
awarded | Citizen Patrol |
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Apr 28 |
revised |
Integrating factor $1/T$ in 2nd Law of Thermodynamics Fixed a typo in the last of the display equations. |
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Apr 28 |
suggested | suggested edit on Integrating factor $1/T$ in 2nd Law of Thermodynamics |
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Apr 24 |
awarded | Informed |
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Apr 12 |
comment |
what's the physical significance of the off-diagonal element in the matrix of moment of inertia I believe $\frac{\omega}{2}$ should be $\frac{1}{2} \omega^2$. |
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Feb 12 |
comment |
Why quantum mechanics? I believe $| \langle a |\psi \rangle |^2$ should be $| \langle a |\psi \rangle |^2 da$. |
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Dec 25 |
awarded | Enthusiast |
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Oct 30 |
revised |
Why might the normal force on a box not be equal to its weight? added 48 characters in body |
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Oct 26 |
comment |
Why might the normal force on a box not be equal to its weight? @Leonardo - I don't think of my first answer (a box on top of the box being asked about) as a trick answer, but rather as perhaps the simplest possibility to understand. However, inspired by Mark's answer (so I am giving his answer an up vote), I have added a few more possibilities. |
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Oct 26 |
awarded | Editor |
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Oct 26 |
awarded | Supporter |
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Oct 26 |
revised |
Why might the normal force on a box not be equal to its weight? added 315 characters in body |
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Oct 25 |
comment |
Why might the normal force on a box not be equal to its weight? @Leonardo - If you have a 2.00 kg block sitting directly on top of another 2.00 kg block, which in turn is sitting on the (level) floor, then the three forces on the bottom block are... 1) The weight of the bottom block (the gravitational force of the Earth on the bottom block): 19.6 N down. 2) The force of the top block on the bottom block (which is actually a normal force): 19.6 N down. 3) The normal force of the floor on the bottom block: 39.2 N up. |
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Oct 25 |
answered | Why might the normal force on a box not be equal to its weight? |
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Oct 19 |
awarded | Teacher |
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Oct 15 |
answered | Calculating force required to stop bungee jumper |
