Recent content by supercali

got Fourier series as a result of solving a PDE. how do i evaluate the converg. using average error in order to determine the # of terms needed for it to converge to less than X%?

anyone ?

while doing some calculations such as calculating the Bohr radius or velocity of an excitons in semiconductors such as GaAs I didnt understand why is it allowed to use the static permittivity even though the electron and hole aren't as heavy and the spectra is measured at high frequencies such...

thanks dude i really should sleep more because i simply made a calculation mistake this exam in calculus 2 will drive me nuts thanks for the help alllot!

first of all sorry for posting twice it was by a mistake somthing got stuck and i didnt notice that it was already posted... secondly Hall i kind of lost you here :"using x and y as parameters, the "vector differential of area" i didnt really understand that i do get it that the...

using green or stokes is the same thing green is just a private solution of stokes and if you use it you are still stuck with that sin(xyz)

i wonder if it is allowed given we have to do a multiple integral needing 2 variables

Homework Statement let F be vector field: \[\vec F = \cos (xyz)\hat j + (\cos (xyz) - 2x)\hat k\] let L be the the curve that intersects between the cylinder \[(x - 1)^2 + (y - 2)^2 = 4 \] and the plane y+z=3/2 calculate: \[\left| {\int {\vec Fd\vec r} } \right|\] Homework Equations...

Homework Statement let F be vector field: \[\vec F = \cos (xyz)\hat j + (\cos (xyz) - 2x)\hat k\] let L be the the curve that intersects between the cylinder (x - 1)^2 + (y - 2)^2 = 4 and the plane y+z=3/2 calculate: \[\left| {\int {\vec Fd\vec r} } \right|\] Homework Equations in...

never mind got iy thanks allot for the hint

even if i do choose u=x+y+z v=2x+y+z w=3x+4y+z which jacobian will i use? because i need to use another transformation to spheerical coord...

Homework Statement calculate the volume confined within this surface \left( x+y+z \right) ^{2}+ \left( 2\,x+y+z \right) ^{2}+ \left( 3\,x+ 4\,y+z \right) ^{2}=4 Homework Equations The Attempt at a Solution i know that i need to use different variables but i just can't make it

iwe had an expirament that goes like this we made a galvanic cell with half cell zinc and its solution (Zn(NO3)2) and the other half cell was with iron and its solution (Fe(NO3)3) (the Fe solution with ions Fe+3) (both same concentration!) the potential i measured was 0.287V now i just don't...

Homework Statement given 2 vectors in R3 v(a,b,c), u(e,f,g) find the Angle Bisector vector Homework Equations The Attempt at a Solution i just can't find the solution to this problem after working on it allot of time please if you can help i am sure the solution is quite easy but...

great i understand the explanation one more thing though since i have found a solution that is: \[\ln (x) - \frac{{y^2 }}{x} = c\] and we know that the theorem does not apply for the initial conditions what can i say about this solution? does it solve the initial problem?