In Amsterdam they had a decent system that most courses used: There was homework that counts for something like 20-40% of the grade, plus a test which counts for the rest of the grade. EXCEPT if you get a score better than 80% on the test: Then you can make that count for 100%.
Doesn't screw good students who can't be bother to do boring homework ^^
@BalarkaSen There are a couple of things to understand here: 1) +Inductive Effect 2) +Hyperconjugation Effect 3) Ortho Effect . You have understood the Inductive Effect. Good! Now, CH3 has three H's which can show hyperconjugation. So the ortho and para substituted toluene ring's sigma complex is more stable. So ortho and para products will be formed in greater quantity than meta product.
Anonymous
Now coming to ortho effect. Here the Cl-substituent is quite large and would cause steric hindrance at ortho position due to presence of -CH3 group but no such hindrance would occur at the para position of the toluene ring.
Anonymous
This is the major reason for the para product being major. BTW if you are facing difficulty with Organic Mechanisms I'd advise you strongly to buy and follow this set of lectures. They helped me immensely during my prep days.
surely if psychedelic death metal fits in this room, chemistry does too? :P i probably won't be continuing it for long
@Blue Ok, reading.
Anonymous
@0celo7 When you move your Mathematics discussions to the Maths chat we will listen to you. Anyhow, I don't think we will be discussing Chemistry here that frequently.
@Blue Implicitly calling someone a hypocrite sounds pretty hostile to me. (Also, asking to move one topic but not another is not inherently hypocritical)
@ACuriousMind Have you ever seen something regarding the following idea: Take the TCS, but identify the solid tori not in the way that yields $S^3$, but rather so that you get a lens space.
Asymptotically cylindrical CY, to be precise - they're $K3\times [0,1] \times S^1$ asymptotically. Ohh, do you mean the $T^2\times I$ part with "solid tori"?
I mean if you had a volume form then you are orientable. You have a consistent choice of orientation given by volume(X_1, X_2, ..., X_n) = 1 on each tangent space.
I'm actually not sure whether one can modify the TCS to get a lens space though, I'm not seeing that the SvK argument for the fundamental group goes through
A clearer way to think about that maybe that orientability is a reduction of structure group of TM to GL^+(n), and volume form is a reduction of the structure group of TM to SL(n), which is a subgroup of GL^+(n)
@0celo7 Ah, but that's not so bad..... Oh, you said non-Abelian. :(
Anonymous
5:44 PM
@ACuriousMind "Also, asking to move one topic but not another is not inherently hypocritical". Really? How do you define "hypocrisy" then? (Don't take this as an attack. I'm seeking a logically sound argument.) I personally use the definition given in Wikipedia(en.wikipedia.org/wiki/Hypocrisy).
Anonymous
"Hypocrisy is the practice of engaging in the same behavior or activity for which one criticizes another."
@Blue "Discussing topic 1" and "discussing topic 2" are not the same behaviour. There is only hypocrisy if you assume the behaviour being criticized is "not discussing physics", which isn't what's being said. (I'm not exactly trying to say it's a good thing to not want any specific topic here or not, I'm just saying it's not inherently hypocritical to want topic 1 here but not topic 2)
Anonymous
@ACuriousMind Ok I see. I was assuming the behaviour being criticized as "not discussing physics". I get your point of view now. Thanks for clarifying.
I think that, historically, it was sort of the justification of the notion of Ricci flow. Hamilton proved it in soon (immediately?) after defining Ricci flow.
I edited a question but realized somebody had suggested an edit on it while I was editing, and my edit caused his (which could be better than mine) to get rejected by Community. I feel guilty now.
I have heard many times that the speed of light is what we could call THE SPEED LIMIT OF UNIVERSE. I have seen many books that says that photon could travel at the speed of light. Because it is without mass and, all that, it does not interact with the Higgs field. So, what that suppose to mean th...
