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Jun
30
awarded  Popular Question
Jun
22
comment Woman arrives 6s late for the train. Find her velocity to reach it
The relavant quadratic equation is $d_t-d_w = at^2/2-v_m(t-6) = 0$ This quadratic has one solution when $v_m^2 = 4*a*6*v_m/2$ giving $v_m = 4.8m/s$
Jun
21
comment Woman arrives 6s late for the train. Find her velocity to reach it
equation 1 is wrong $d = \int at dt = at^2/2$ that is all. No extra terms That is ofcourse assuming train starts are zero velocity. Who is teaching you this subject. You seem to be making elementary mistakes.
Jun
21
comment Woman arrives 6s late for the train. Find her velocity to reach it
Sketch it on a (x,t) PLOT, try using different velocities v. Notice that drawing a tangent will be the best possible solution, Once you understand how to do that. you can convert it into an algebraic problem.
Jun
21
revised Generalization of De Rham cohomology for spinor fields
deleted 2 characters in body
Jun
19
awarded  Talkative
Jun
19
revised Generalization of De Rham cohomology for spinor fields
Modified question to highlight interest of this site.
Jun
19
comment Generalization of De Rham cohomology for spinor fields
@Qmechanic Why not? I don't see what the problem is? There are different people on each site, I suspect they will have a different point of view. In any case David barmoshe wanted to answer on PSE because he wanted to give a answer rooted in physics. Which is why I posted it here. I guess I can request a transfer from MSE.
Jun
19
asked Generalization of De Rham cohomology for spinor fields
Jun
15
comment Invariance of supersymmetric Yang-Mills theory under supersymmetry
@Qmechanic If you or others think the tag is appropriate go aheard. I don't like the idea because, the implication seems to be that the question will not be answered fully, but only hints will be provided the general direction. I would much rather prefer a full answer with all the details involved. It would also be useful as resource material for anyone interested in this question.
Jun
14
revised Invariance of supersymmetric Yang-Mills theory under supersymmetry
Tag Homework and excercises does not apply here in my opinion. It is not preferable to guide the asker, It would rather have a full answer.
Jun
13
revised supersymmetry in 7, 8, 9 dimension
added 83 characters in body
Jun
12
revised supersymmetry in 7, 8, 9 dimension
added 23 characters in body
Jun
12
answered supersymmetry in 7, 8, 9 dimension
Jun
12
asked Invariance of supersymmetric Yang-Mills theory under supersymmetry
Jun
11
comment Analogy for the AdS/CFT Correspondence
I have decided not to give the bounty to anyone.
Jun
11
comment Wheeler's delayed choice experiment
@CuriousOne I don't disagree with what you say about weak measurement and so on. I really wanted to avoid talking about Quantum field theory for now, but since you brought it up again. The point is excitations of the quantum field are quantized, which is what we call particles. You can never have Half a particle(Or half an excitation). The point I am making is that there are no such thing a particle. There is only particle like phenomenon.
Jun
11
comment Analogy for the AdS/CFT Correspondence
Ofcourse it is the case that we are nowhere near to Test conjunctures like holography. It may take decades it may take centuries it doesnt matter. It is theoretically motivated at the present.
Jun
10
comment Analogy for the AdS/CFT Correspondence
This analogy is not even an oversimplificaiton. If you want to oversimplify something you should understand it in the first place. It has nothing to do with Ads/CFT correspondence. And regarding "Only we have no evidence whatsoever for this speculation. None." There is plenty of good motivation to study holography. Black holes, Horizons, Ted Jacobson's work etc...
Jun
9
comment Wheeler's delayed choice experiment
@CuriousOne We can discuss this issue slowly, What do you associate with a wave? and what do you associate with a particle? Once we understand that question classically, then we can ask the question can I engineer situations where an electron can appears to behave as a wave. And also can I engineer a situation where an electron behaves as a particle? Which is not to say it is either of them, the point is it can be made to appear as one of them.