meta user
network profile
| bio | website | |
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| location | ||
| age | ||
| visits | member for | 1 year, 4 months |
| seen | Aug 15 '12 at 12:31 | |
| stats | profile views | 17 |
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Feb 11 |
awarded | Popular Question |
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Jul 22 |
awarded | Scholar |
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Jul 22 |
accepted | Degeneracy of Energy Levels for 2 identical particles in a One Dimensional box |
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Jul 20 |
awarded | Supporter |
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Jul 20 |
comment |
Degeneracy of Energy Levels for 2 identical particles in a One Dimensional box thank you for this unbelievable thourough answer! it will take some time for me to process and understand it i will come back on it :) |
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Jul 20 |
comment |
Degeneracy of Energy Levels for 2 identical particles in a One Dimensional box thx for editing, altough: it is definitly NOT homework. its an exercise from an old exam. (at a certain point there is no such thing as 'homework' anymore) ;) |
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Jul 20 |
asked | Degeneracy of Energy Levels for 2 identical particles in a One Dimensional box |
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Feb 1 |
comment |
change of resistance in semiconductors due to temperature change wheras conductivity and resistance indirectly proportional so it does not really matter which one you calculate =) if the resistance drops with a factor 3.5 the conductivity goes up by the same factor, and vice versa. |
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Feb 1 |
awarded | Editor |
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Feb 1 |
revised |
change of resistance in semiconductors due to temperature change added 96 characters in body |
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Feb 1 |
awarded | Teacher |
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Feb 1 |
answered | change of resistance in semiconductors due to temperature change |
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Feb 1 |
comment |
change of resistance in semiconductors due to temperature change i couldnt because i had too little reputation. i will as soon as i get to a conputer (just cell here). rho is the specific resistance @akhmeteli |
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Jan 31 |
awarded | Student |
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Jan 31 |
comment |
change of resistance in semiconductors due to temperature change haha thank you for this funny link :P as said - i was able to solve it myself =) |
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Jan 31 |
comment |
change of resistance in semiconductors due to temperature change i finally found the answer =) for anyone who is ineterested: $\rho(T)=\rho_0\cdot e^{-\frac{E_g}{2k_BT}}$ so the factor would be $\frac{\rho(Room)}{\rho(273.15)}=e^{-\frac{E_g}{2k_B300K}+\frac{E_g}{2k_B273.15K}}$ to achieve 3,5 as factore we change the equation to find $E_g$ and get $E_g=-ln(3.5)\cdot 2k_B\cdot \frac{1}{\frac{1}{300K}-\frac{1}{273.15K}}\approx 0.65$ which is very close to 0.67, the bandgap of germanium. thanks for helping anyways =) |
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Jan 31 |
comment |
change of resistance in semiconductors due to temperature change oh yes clearly silicon (sry im swiss, in german its called 'silicium' confusing..) and yes it should be -aT but still i dont get to 3.5 onany, maybe iused the wrong a.. |
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Jan 31 |
comment |
change of resistance in semiconductors due to temperature change p = p_o * e^(a*T) but this gives factors of sizes up to 10^295 which is rediculous :/ |
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Jan 31 |
comment |
change of resistance in semiconductors due to temperature change i could only find the formula: |
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Jan 31 |
asked | change of resistance in semiconductors due to temperature change |
