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anonymous
 one year ago
An attractive force of 7.2 N occurs between two point charges that are 0.05 m apart. If one charge is  4.0 µC, what is the other charge?
A. +0.5 µC
B. +2.0 µC
C. 2.0 µC
D. 4.0 µC
anonymous
 one year ago
An attractive force of 7.2 N occurs between two point charges that are 0.05 m apart. If one charge is  4.0 µC, what is the other charge? A. +0.5 µC B. +2.0 µC C. 2.0 µC D. 4.0 µC

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Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2here we have to apply the law of Coulomb: \[\Large F = K\frac{{{q_1}{q_2}}}{{{d^2}}}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok! what do we plug in?

rvc
 one year ago
Best ResponseYou've already chosen the best response.1do you know for what the symbols stand @iheartfood

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes, i believe so.... i just get confused with inserting :/

rvc
 one year ago
Best ResponseYou've already chosen the best response.1oh tell us what the symbols mean

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2the next step is: \[\large {q_2} = \frac{{F{d^2}}}{{K{q_1}}} = \frac{{7.2 \times {{\left( {5 \times {{10}^{  2}}} \right)}^2}}}{{9 \times {{10}^9} \times 4 \times {{10}^{  6}}}} = ...Coulombs\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that right? if so, what is the next step? :)

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2what is the sign of q_2?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2yes! since the force is attractive and q_1 is negative

rvc
 one year ago
Best ResponseYou've already chosen the best response.1attractive force exists between opposite charrges

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ooh yay! so our solution will be either 2.0 or 4.0 ? how can we find which it is?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2our solution is: \[\large 5 \times {10^{  7}} = 0.5 \times {10^{  6}} = 0.5\mu C\]

rvc
 one year ago
Best ResponseYou've already chosen the best response.1no if one is negative other will be positive

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh ok! yay thank you!! +0.5 it is!!

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2that's right! @iheartfood
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