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Please help: Calculate the electric field at the center of a square 52.5cm on a side if one corner is occupied by a +45uC charge and the other three occupied by 27uC charges.
 one year ago
 one year ago
Please help: Calculate the electric field at the center of a square 52.5cm on a side if one corner is occupied by a +45uC charge and the other three occupied by 27uC charges.
 one year ago
 one year ago

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baldymcgee6Best ResponseYou've already chosen the best response.2
sounds like physics bud
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
but i will help you anyway. you just need to find the NET electric field.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
if you want me to help. . .
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
Do you know the formula for electric field?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
dw:1340433733455:dw
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
does the question say the side length of the square is 52.5cm?
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
The question say: "at the center of a square 52.5cm on a side if one corner is occupied by a +45uC charge..."
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
okay, i'm going to assume the "side length" is 52.5cm
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
okay. i think it is the length.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
dw:1340433904871:dw
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
hmm i think thats it.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
you need the length from the corner to the charges. do you know how to find that?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
okay, if we have the side length of 52.5cm, to find the diagonal length we multiply this by \[\sqrt{2}\]
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
because a square is in the form of x^2+y^2=2.. you can look into it later, and just trust me.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
haha, k... so that 74.25cm is the diagonal length, we divide this by 2 to give us the corner to center length
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
okay so now we can use our formula.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
close enough, in physics we typically use 8.99 x 10^9
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
oh but can we use 9x10^9 ?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
we have to calculate each individual electric field. sure, it is close enough.
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
okay. then our Q is what? our R is 37.12 ?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
our q is the charge, there are 4 different charges. +45uC and 27uC, 27uC, 27uC
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
so we will use the four different charges? one by one?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
we will do two separate computations as three of them will be the same (27uC)
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
so lets get started
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
okay sure lets get started
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
fill this in with what we know: E=(kq)/r^2
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
or just do it on you're calculator and tell me the two answers
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
E=(9x10^9) (+45uC)/37.12 ?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
close... E=(9x10^9*45E6)/(37.12)^2 dont forget to square the denominator
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
and also remember the units for the charge is in micro coulombs
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
why is the exponent is 6 ?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
i just told you, because the units are in uC
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
that little "u" mean E6
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
okay, so what your answer?
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
then the C means coulombs?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
you used this? E=(9x10^9*45E6)/(37.12)^2
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
well i'm afraid that is wrong, you must have typed it in wrong
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
http://www.wolframalpha.com/input/?i=%28%289x10%5E9%29%2845E6%29%29%2F%2837.12%29%5E2
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
E means exponent right?
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
k dude, you take way to long. I need to sleep. You should get a value of 293.55 N/C for the +45uC and you should get 176.13 N/C for the 26uC
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
right, 27uC still the same answer.
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.2
i think you should be able to do it from here.. i've been helping you for over an hour.
 one year ago

alfers101Best ResponseYou've already chosen the best response.0
okay thank you so much.
 one year ago
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