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anonymous
 5 years ago
Can anybody help me out here, or guide me where to start?
In the image, the net electrostatic force in Qa is equal to 0, if Qa = +1.00 nC, what is the magnitude of Q0
anonymous
 5 years ago
Can anybody help me out here, or guide me where to start? In the image, the net electrostatic force in Qa is equal to 0, if Qa = +1.00 nC, what is the magnitude of Q0

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dw:1326996252832:dw

JamesJ
 5 years ago
Best ResponseYou've already chosen the best response.1Find the force acting on Qa from each of the other three charges, using Coloumb's law. Sum them up and set it equal to zero. This will enable you to find Q_0.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0How can I know the distance between Qa and Q0?

JamesJ
 5 years ago
Best ResponseYou've already chosen the best response.1Pythagorus' Theorem. Call that distance r. Then \[ r^2 = (2a)^2 + (2a)^2 = 8a^2 \] hence as r is positive, \[ r = \sqrt{8}a = 2\sqrt{2}a \]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0pythagorus theorem wont do, its not making a right angled triangle, use the point distance formula

JamesJ
 5 years ago
Best ResponseYou've already chosen the best response.1It is making a rightangled triangle with respect to the coordinate directions. And that is exactly how we derive the formula for distance in Euclidean space.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0we can directly use the , point distance formula here http://upload.wikimedia.org/wikipedia/en/math/4/0/8/408e1a8e214282114e49fc9f2abee36d.png

JamesJ
 5 years ago
Best ResponseYou've already chosen the best response.1Yes, it's the same thing.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thanks for your replies, but I dont have a value for a

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you have to get the ans in terms of a in this
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