#4**+2 **

Late yesterday, or early this morning, someone posted an ethnic joke in the form of a riddle on the forum. It was a fusion of a “change a light bulb” and “in a bar” type of joke, with a diverse list of ethnicities and races. The joke was one paragraph and totally readable without clicking on it, with only 4 views until JB posted a reply indicating that the answer depended on whether the bartender was a (derogatory name: Italian) or (derogatory name: Irish). The view count started jumping noticeably after JB’s post.

JB is a troll and his interest is in humor, not racism. I figured he choose those two ethnicities because he’s of Italian heritage and I’m Irish. I thought his reply has to be funnier than the punch line of the joke. That remains to be seen, though, because I still don’t know the punch line, but I have a good guess.

Lancelot Link told me that during the initial re-sequencing processing for his genetic enhancement, he awoke one morning to notice he’d become black. He said during the first life-changing moments while he looked in the mirror, he heard Rod Sirling’s voice, “For your consideration, Mr. Lancelot Link, formerly a mutterer of racial slurs and ethnic jokes; now, an Ebony reader in the Twilight Zone.” OMG! LMAO! _{Is it racist of me to think that funny?}

During a subsequent enhancement, Lancelot also became a woman. You can read about it here.

Chimp Roland, the principal ethics adviser to Lancelot’s A.P.E, advised that it would be easier and more natural in establishing egalitarian parity by *hating* everyone equally. He called it the “Dirty Harry” equality theory. The issue was tabled for more research.

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Today’s assignment: Compare and contrast how a mathamation, an engineer, and a physicist would approach changing a light bulb. For extra credit, include how a banker would approach the problem.

GA

GingerAle
09-dic-2017

#5**+3 **

Actually, __that is the professional way of doing it__, when you’re teaching concepts.

Here’s a LaTex formatted, reproduction from

http://mathworld.wolfram.com/CircleDivisionbyLines.html

deriving the general solution formula for circle cutting (pancake cutting) problems in a plane.

\(\begin{array}{lrl} F(1) &=& 2 \\ F(2) &=& 2+f(1) \\ F(n) &=&n+f(n-1) \\ \small \text{Therefore, }\\ &=&n+(n-1)+f(n-2)\\ &=&f(1)+\sum \limits_{k=2}^{n}k \\ &=&2+\dfrac{1}{2}(n+2)(n-1) \\ &=&\dfrac{1}{2}(n^2+n+2) \\ \end {array} \)

Here’s the specific solution for this problem using the quadratic formula. As expected, this matches Hectictar’s solution.

\(\dfrac{(n^2+n+2)}{2}=16\\ n^2+n+2=32\\ n^2+n-30=0\\ \dfrac{-1+\sqrt{1^2-4\cdot \:1(-30)}}{2 \cdot 1} = 5\\ \dfrac{-1-\sqrt{1^2-4\cdot \:1(-30)}}{2\cdot \:1} = -6 \small \text{ (Not used as a solution for this problem in this universe.* }\\ \)

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*The negative six (-6) is a solution in an alternate universe.

I’ve visited that universe. I noticed on the forum there, that Sisyphus is the prolific solution master for mathematics, and CPhill is the well-known rock-roller.

GA

GingerAle
06-dic-2017

#10**+2 **

**A question of Ethics:**

^{You know, you could just say it's rude to delete your post blab blah etc jabber on and then post back my question right? But no, you didn't.}

Oh, But I did. __I did that very thing.__ I said its rude then jabbered on; then posted back your question.

^{Instead, you acted like ginger. Very bitter, and nasty.}

Yes, I did act like Ginger. That’s who I am. Generally, it’s only adolescents and adults who act like little bratty children that of think of me as bitter and nasty. So, it’s easy to understand why you think so.

^{ What you're telling me, is that if CPhill or Melody weren't going to hide unethical comments as such, why would you want to make them in the first place?}

Your question is a non sequitur. I’ll answer it, though.

It’s not unethical to sound a fire alarm if there is a fire. It’s not unethical to sound the Ahole alarm if there is an Ahole nearby.

**However, it is unethical to vandalize a post. Once you make a post and it is answered, it’s no longer your post—it belongs to the forum. Over time, potentially thousands of students can learn from these posts. However, that can never happen, because you effectively destroy them. That is unethical and it is petty; so yes, I would curse you. The only reason I didn’t, is because a moderator would likely hide the post and you would not be able to read it. That would be kind of pointless, wouldn’t it? **

Another thing you should know is Andree Massow, the web master, will ban you for deleting your question posts. He has no sense of humor about it. . . . Well maybe he does have a sense of humor about it, but he will still banish you. Here’s an example of someone who píssed off Herr Massow.

^{Bad character I suppose. I would try to start acting like Fanta, very nice and sweet.}

Scréw that! That’s out of character for me. Perhaps my character is bad. It’s not a certainty, but it’s open for debate. Irish GinerAle doesn’t rank high on the list of favorite sodas for bratty children and adolescents, but it’s higher on the list than the lime-y flavor of Julius.

GingerAle isn’t just a sobriquet— it is my name. I’m Ginger Alexandra.

GA

GingerAle
02-dic-2017

#2**+3 **

Solution:

This post has an explanation of the physics by Sir Alan and an example by Heureka.

Here is a reproduction of Heureka’s math, using the data from this question.

\(\begin{array}{rcl} I &=& \frac{P}{4\cdot \pi\cdot r^2} \qquad P = 23\ \text{watt} \qquad r = 19\ 500\ 000\ m\\ I &=& \frac{23}{4\cdot \pi\cdot 19500000^2} \\ \\ I &=& 4.8\cdot10^{-15}\ \frac{W}{m^2}\\ \end{array}\)

Closest answer from list: **5 x 10 ^{−15} W/m2**

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It’s usually not necessary to reinvent the wheel, but you must be careful not to inflate the tire on the wheel with hot air from a blarney bag.

GingerAle
28-nov-2017