Recent content by somebodyelse5

thanks guys, looks like i just made this problem a bit more difficult than it had to be. I am going to use a density in g/cm^3 and convert it to atoms/m^2 and calculate at.% and wt. % from there.

My book has nothing to do with "Doping" and my class has not covered this. My book actually, does not even cover at. % or wt. %. So I could just look up the density of silicon in as a solid and calc from there? Temperature does not matter here? (assuming that it doesn't, since the problem...

Homework Statement Given: 5x10^21 Phosphorous atoms/m^3 in solid solution in silicon Find: atomic percent and weight percent of Phosphorous atoms The Attempt at a Solution I know how to solve for at. % and wt. % when given two values, I am not sure how to get the second value given the...

nope, that's it, I scanned everything involved. this is the last problem. I would guess linearity, but we covered it for like 20 minutes and moved on. If I were to use linearity, where would I start?

Homework Statement Here is the problem. Is it as easy as my attempted solution? I think its more difficult but I am completely lost. The Attempt at a Solution simply integrate 1/.8S dS = 1 dt use 2009 as start time so t=0 and S=.6 to solve for C

appreciate the responses guys. In my frantic searches and calls to fellow students it turns out i simply "forgot" a 2 in front of the first term, and mixed up the unit vector for the second term. If you guys are at all interested, I can post the correct equation tomorrow? got to keep studying now!

I have a derivation for the coriolis acceleration on a "merry go round" that my instructor gave in class, i was wondering if someone could tell me if this is correct or offer the correct final equation. Additional information: this is from the rotating point of view on the merry go round...

k thanks!

where x is the vector used to create the equation of the tangent plane? what do i set as c?

do you know of any good online physics resources for electro fields? I am having some trouble understanding everything the professor is teaching, and i know this stuff should be much easier than i am making it!

Homework Statement Find the equations of the normal lines to the surfaces at the given points. z=(3/4)x^2+3y^2 @ pt. (2,1) 2. The attempt at a solution I have already found the equation of the tangent plane and know it is correct. Tangent plane => (z-6)=3(x-2)+6(y-1) Now, I am confused...

Homework Statement An electron is released from rest in a weak electric field given by vector E = -2.40 10-10 N/C jhatbold. After the electron has traveled a vertical distance of 1.8 µm, what is its speed? (Do not neglect the gravitational force on the electron.) Dont even know where...

Am I allowed to simply take the integral from n=# to infinity to determine if the series converges or diverges? If the answer is infinity then it diverges If the answer is a number then it converges, is the sum this number or does it converge to this number? Or is the number it converges to...

Thanks! For the unit circle, the points (x,y) does x correspond with cos and y correspond with sin? How does that part work?

Homework Statement Find an equation of a plane containing the three points (0, -4, 4), (5, -1, 1), (5, 0, 3) in which the coefficient of x is 9 Homework Equations N/A The Attempt at a Solution Totally lost on this guy. Prof didnt go over anything like this, nor tell us what the...