Hi,
is there any general formula to find out the final velocity w, happened by a boost in x direction forst and then to y direction?
I could find the boost matrices for both and I know it's not purely another boost, rather a boost and a rotation, but I am really confused which formula to use...
Hi, i have been going through some elementray reading on group theory.
if g(θ) is a group element parameterized by the continuous variable θ. g(θ i )| θ i =identity,
if D(θ i ) is a matrix representation on a d dimensional vector space V . What is D(θ i )| θ i =0 ?
Homework Statement
I have been given a functional
$$S[x(t)]= \int_0^T \Big[ \Big(\frac {dx(t)}{dt}\Big)^{2} + x^{2}(t)\Big] dt$$
I need a curve satisfying x(o)=0 and x(T)=1,
which makes S[x(t)] an extremum
Homework Equations
Now I know about action being
$$S[x(t)]= \int_t^{t'} L(\dot x, x)...
the question statement is2. In a course, a student's final exam is weighted twice as heavily as his midterm exam. If a student receives a score of 84 on his final exam , 90 on his midterm, what is the average for his courses?
now i am pretty confused should I have to know the total marks for...
Hi , I finished my undergrad major in physics this fall. I wish to apply to grad school for next fall, so I need some book review books on physics, I n my university we followed Griffith's intro to QM as textbook, I solved almost all the problems there upto chapt 7, but this seemed a more...
Hi. I completed my undergrad major in physics and want to go to grad school for astrophysics. I want to have a year revision of the mathematics needed for astrophysics. What type of math is needed to excel to be a successful astrophysicist. I have some lacking in integration . What others are...
Homework Statement
-h^2/2m (sqrt(2b/pi)) e^(-bx^2) d^2/dx^2 (e^(-bx^2)) dx from - to + infinity
Homework Equations
I tried differentiating e^(-bx^2) twice and it came up weird , I positioned the values and finally cam up with (-2b sqrt(pi/2b)...is there any other way to do it ?
The...
well I know my scores are not helping me anyway, and I have not finished my graduation yet, so I want easily wait one more year to retake. But its a masters program, so do you think my chances are really null?
Hi, I can do it well when I approach the same problem next time, I just have problem with the first time, like when i face a problem , I just don't know how to start it, as soon I see the solution I can do it. How can I know how to initialize the solving ?
Hi, I have some basic problem with solving physics problems. I cannot solve the quantum or statistical problems without help or by myself. sometimes the problem is that I don't even get what to start with. I am in my undergrad last year now. do you have any suggestion how to improve my problem...
hi, i have been applying to ms in physics at umass dartmouth for fall-15, I have 85% cgpa in undergrad and I have my paper and thesis, but my first physics gre is out today and I got only 580(25%)! I can't believe I scored this bad.
my toefl and genera gre are to be held soon. I hope optimum...
Hi, i have been struggling to find some good resources on variational principle , I have got an instructor in advanced quantum course who just have one rule for teaching students- "dig the Internet and I don't teach you anything".. So I digged a lot and came up with a lot reading but I need...