How Strong is the Force Between Two Positive Charges?

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Homework Help Overview

The problem involves calculating the force between two positive charges, specifically a +15 µC charge and a +2.6 mC charge, separated by a distance of 41 cm. The context is rooted in electrostatics and Coulomb's law.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculations involved in determining the force, including unit conversions and potential errors in the order of magnitude. There is uncertainty regarding the correct application of significant figures and the interpretation of the problem requirements.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the calculations and questioning the accuracy of their results. Some guidance has been offered regarding the potential for errors in unit conversion.

Contextual Notes

Participants note the constraints of having limited attempts to submit answers and express concern over possible issues with significant figures or exactness in the answer required by the platform.

corey7
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Homework Statement


What is the magnitude of the force a +15 µC charge exerts on a +2.6 mC charge 41 cm away?


Homework Equations


F=Ke(Q1*Q2)/d^2


The Attempt at a Solution


Well I plugged in the numbers for the variables. Converted 15 and 2.6 to coulombs and 41 to meters. I did the math and got like .2088. I have to input my answer on this site and I have five tries to do so. I used three already so I really don't want to screw up again without help...or something like that...you get what I'm saying.
 
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Welcome to PF.

I think your orders of magnitude are off. Check your powers of 10.
 
Well you uhh may be right, and thanks for the welcome. I tried it again and I got 2.088 but I put that in and still got it wrong. Me == confused now. Maybe it wants an exact answer or its screwing me over for sig figs or something...maybe I'm just wrong.
 
Ooof I read it over...hehe...yeah I converted 2.6 as if it were micro
 

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