Greatest hits from previous weeks

11.35.2 Greatest hits from previous weeks

11.35.2.1 Figuring when the minute and hour hand coincide on a clock
11.35.2.2 Why I get the "Set::write: "Tag Times in is Protected." error?
11.35.2.3

Solving $L=\frac 3  2  \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2   \sqrt 2  +\frac 3 W  2 $ for $W$

11.35.2.4 How to graph a sphere with cartesian equations?
11.35.2.5 1 Plot, 2 Scale/Axis
11.35.2.6 Calculating the normalization constant for a wavefunction
11.35.2.7 How do I clear all user defined symbols?

11.35.2.1 `Figuring when the minute and hour hand coincide on a clock`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=573

I would like to list all possible times in a 12-hour period, where the hour hand overlaps the minute hand completely.  This is really a question about three distinct things - to be done in Mathematica ... 
[equation-solving]

asked by Steve D https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=191 Score of 16

answered by Verbeia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8 Score of 22

11.35.2.2 `Why I get the "Set::write: "Tag Times in is Protected." error?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=11868

Why I get the error below with this code: 
 
... 
[vector-calculus]

asked by Aurelius https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1669 Score of 11

answered by Mark McClure https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36 Score of 16

11.35.2.3 `Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=57763

When I solve the aforementioned equation for $W$ or $A$ on Mathematica I get a long and ugly equation in return, namely one of the solutions for $W$ is: (attempt to read at your own health) 
 
... 
[equation-solving] [functions] [approximation]

asked by J.D'Almbert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19257 Score of 7

answered by Alexei Boulbitch https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=788 Score of 15

11.35.2.4 `How to graph a sphere with cartesian equations?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=24169

I'm new to Mathematica and I need to ask how to graph a sphere, cylinder, etc.. using cartesian equations. 
 
For example in sphere's case $x^2+y^2+z^2=1$ 
 
I tried to use ... 
[plotting]

asked by German https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7145 Score of 9

answered by Dr. belisarius https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=193 Score of 15

11.35.2.5 `1 Plot, 2 Scale/Axis`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=627

I would like to plot those two datasets on top of each other. But they have very different range on the $y$ axis. How can I have two different axis? 
 
I found the following on the help menu but quite ... 
[plotting] [customization]

asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 Score of 164

answered by ArgentoSapiens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92 Score of 165

11.35.2.6 `Calculating the normalization constant for a wavefunction`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=99248

How can I compute the normalization constant for a quantum mechanics wave-function, like $\Psi(x) = N \exp(-\lambda x^2/2)$ by using Mathematica? (The normalization constant is $N$). 
[physics]

asked by infiniteNOP https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=35524 Score of 2

answered by Jason B. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9490 Score of 5

11.35.2.7 `How do I clear all user defined symbols?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=850

Is there some way to do this other than going to  Evaluation -> Quit kernel  and firing a new one up? 
[variable-definitions] [symbols] [faq] [clear] [persistence]

asked by niklasfi https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=82 Score of 115

answered by Artes https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=184 Score of 122

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11.35.2 Greatest hits from previous weeks

11.35.2.1 Figuring when the minute and hour hand coincide on a clock

11.35.2.2 Why I get the "Set::write: "Tag Times in is Protected." error?

11.35.2.3 Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$

11.35.2.4 How to graph a sphere with cartesian equations?

11.35.2.5 1 Plot, 2 Scale/Axis

11.35.2.6 Calculating the normalization constant for a wavefunction

11.35.2.7 How do I clear all user defined symbols?

11.35.2.1 `Figuring when the minute and hour hand coincide on a clock`

11.35.2.2 `Why I get the "Set::write: "Tag Times in is Protected." error?`

11.35.2.3 `Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$`

11.35.2.4 `How to graph a sphere with cartesian equations?`

11.35.2.5 `1 Plot, 2 Scale/Axis`

11.35.2.6 `Calculating the normalization constant for a wavefunction`

11.35.2.7 `How do I clear all user defined symbols?`