when indicating the region of the complex plane that corresponds to all points z that satisfy the condition
|z|=11
this region would be the circle of radius 11 around the origin because the |z-w| is the distance between z and w, where z and w are both complex numbers
in general |z-w|=r would...
Homework Statement
\int\int-xlogy dy dx
the only problem i have is finding the integral of logy
i know i have to integrate my parts with u = logy and dv=dy
the book says the the integral of logy is ylogy-y but isn't the derivative of logy equal to 1/ylna where a is the base?
so isn't...
http://en.wikipedia.org/wiki/Image:Si_Hund.png
can someone help clarify something for me
in this diagram why is it that the arrow is placed in +1 first and in my textbook it is placed in -1 first?
Homework Statement
http://img223.imagevenue.com/img.php?image=79777_Untitled_122_69lo.jpg
So for this setup i understand that the light generates EHP in the semiconductor and creates a concentration gradient which causes the electrons and holes to diffuse to the other side, so if the light is...
ok for my end result i calculated a resistivity of .256(Ohm meters) using a resistance of 2755Ohms but the accepted value is .46 so am i doing this correct?
o I'm sorry i shouldve been more specific i actually measured this in a lab and this is one of the questions for my lab report
so i measured the resistance of the germanium at different temperatures and now I'm just trying to find the resistivity given the setup i posted ealier
the dimensions of...
im given the resistance of 2755Ohms at 300K
and I'm trying to find the resistivity.
so I'm guessing since i have the resistance i integrate all the resistances since they are in series so they just add?
this is what I've done so far...
ooo whoops i wrote the equation down wrong
i was suppose to do
dR=(resistivity*dx)/A
then integrate right? or do i use
dResistivity=(Resistance*A)/dx?
ok so i did it with the
dR=(resistivity*dx)/A
but i got ln(0) so it approaches -inf??
ok so there is an infinite resistivity when the area approaches zero do you have any hints on what to do next and how to set up the integral...I'm still kind of lost...do i integrate this from the middle of the square to the corner because of symmetry?
Hey guys i was just wondering how hard is it to find a job after getting a BS in EE because today my professor said he has been in the industry for about 10 years and it isn't easy getting a job and he told us to just go to grad school instead, which is kind of discouraging so i was just...
Homework Statement
calculate the resistivity of the germanium sample
setup below given the resistance and the dimensions
http://img25.imagevenue.com/img.php?image=91205_lab5_122_1170lo.JPGHomework Equations
Resistivity=(resistance*Length)/(Area)The Attempt at a Solution
Ok so I know how to find...
Homework Statement
determine which way the current goes
Homework Equations
kirchoff's current law
The Attempt at a Solution
i say that it is moving away because if i say its positive going into element1 then since its negative its going out of element1 so its moving away from A