Differences

This shows you the differences between two versions of the page.

--- classes:2009:fall:phys4101.001:q_a_1113 [2009/11/13 00:09] – fitch
+++ classes:2009:fall:phys4101.001:q_a_1113 [2009/11/30 09:10] (current) – x500_bast0052
@@ Line 1: / Line 1: @@
-===== Nov 13 (Fri)  =====
+===== Nov 13 (Fri)  Quiz 3 up to Hydrogen  =====
 **Return to Q&A main page: [[Q_A]]**\\
 **Q&A for the previous lecture: [[Q_A_1111]]**\\
@@ Line 43: / Line 43: @@
 ===Esquire 11/12 8:38pm===
 Oy! I also found the Bohr radius. Mate.
+===Devlin===
+I got the Bohr radius as well.
 ===Super Hot Guy 11/12/09 12:16===
@@ Line 49: / Line 52: @@
 ===Dark Helmet 11/03===
 Half an angstrom here as well
+===liux0756 11/13===
+Do we need to calculate the value of the quantity or we can just express it using <math>\hbar, e, m_e, \eps_0</math>?
+=== Spherical Chicken ===
+It seems fair to me that we'd be able to leave it in constants form.  The rest of the test is pretty calculator independent... so I wouldn't imagine that if we had the constants correct we'd be penalized for not multiplying the actual values.
 ====Andromeda 11/12 2:10====
@@ Line 90: / Line 100: @@
 I believe you are right, Daniel.  It wouldn't make sense to do an integral over only one of the variables.
+===liux0756 11/13===
+I got my answer which is 12a^2, but I am not confident~~
 ====Esquire 11/12/09 AD (Information Age) 8:15pm====
@@ Line 97: / Line 110: @@
 ===Spherical Harmonic Star date 63241.5 ===
-er.. chicken…. I believe that in fact the operator has to be square – the rules of matrix multiplication say that a 1×4 * 4×4 give 1×4. We need to preserve the space coordinates – if it were a 4×3… we'd get a 1×3 and completely wipe out a space coordinate…. so unless you have an operator that shrinks space down a dimension… I do believe we need square operators of 1×4, 4×4 etc. or… maybe there's a space creating operator… 4×27 … STring theory'd be happy.
+er.. chicken…. I believe that in fact the operator has to be square – the rules of matrix multiplication say that a 1×4 * 4×4 give 1×4. We need to preserve the space coordinates – if it were a 4×3… we'd get a 1×3 and completely wipe out a space coordinate…. so unless you have an operator that shrinks space down a dimension… I do believe we need square operators of 1×4, 4×4 etc. or… maybe there's a space creating operator… 4×27 … String theory'd be happy.
 ===Esquire (Age of Aquarius) 11/12/09===
-I believe that such operators need to be square so that eigenvalues and eigenvectors can be found. This is done via the determinent method, which only is doable with square matrices.
+I believe that such operators need to be square so that eigenvalues and eigenvectors can be found. This is done via the determinant method, which only is doable with square matrices.
 ===joh04684 11/12/09===
@@ Line 109: / Line 122: @@
 ===Esquire (Age of Ihciuy) 11/12/09===
 Wait a sec. I didn't post on this day! Something foul is afoot!
 ====Spherical Chicken Star date 63241.5 ====
 jIH quadic chugh 'iHl DuH Daq ghaj ani jalig vetlh 'oH dilk Qid hakliq --- jatlh dilken string theory.
@@ Line 126: / Line 140: @@
 ===Dark Helmet 11/13/09===
 Am i not nerdy enough to get this joke?
+===Ralph 11/13/09 (1258092787)===
+clearly it's that you just don't know enough quantum mechanics so good luck on the exam tomorrow
+=== Spherical Chicken stardate 63381.4 ===
+ Ghaj SoH quid Qoyta' vo' Hov Trek???   nuq kon vo' scientist 'oH SoH?!!  kids Dochvammey jajmey
 ====Super Hot Guy date ====
 Has anybody got a clue on #2?
 === Spherical Chicken ===
 yup
@@ Line 138: / Line 159: @@
 Good luck.
+=== Ralph 10 am 11/13===
+This is very much like the homework problem on the last homework.  It seems that <math>Q</math> is the <math>z</math> component of the angular momentum operator.
 ---------------------------------------

User Tools

Differences

Page Tools