Verifying Coulomb's Law: Q1, Q2 & R

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    Coulomb's law Law
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The discussion revolves around verifying Coulomb's Law calculations for two charges, Q1 and Q2, with values of 2 mC and 1 mC, respectively, and a distance of 5 cm. Initially, the user calculated a force of 7.1904 N but was questioned about the unit conversion from millicoulombs (mC) to microcoulombs (μC). After clarification, it was confirmed that the calculations were correct if the charges were indeed in microcoulombs. The final consensus is that the user's solution is accurate, provided the correct unit for the charges is used. The importance of proper unit conversion in physics calculations is emphasized.
Tony Tesla
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Hi, Can someone help me with this question? I understand Coulomb's law but i want to know if I am doing it right.
So the charge of
Q1= 2 mC
Q2= 1 mC
And R= 5 cm (0,05m)
This is how i solved it.
F= K(8,988x10^9) x (2x10^-6)x(1x10^-6) / (0,05m)^2
F= K(8,988x10^9) x 8x10^-10
F= 7.1904 N

Is 7.1904 the right answer?
 
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Tony Tesla said:
Hi, Can someone help me with this question? I understand Coulomb's law but i want to know if I am doing it right.
So the charge of
Q1= 2 mC
Q2= 1 mC
And R= 5 cm (0,05m)
This is how i solved it.
F= K(8,988x10^9) x (2x10^-6)x(1x10^-6) / (0,05m)^2
F= K(8,988x10^9) x 8x10^-10
F= 7.1904 N

Is 7.1904 the right answer?

Hi Tony Tesla...

Welcome to PF!

1mC = 10-3C , not 10-6C

Please recheck your calculations.
 
Submultiples Multiples
Value Symbol Name Value Symbol Name
10−1 C dC decicoulomb 101 C daC decacoulomb
10−2 C cC centicoulomb 102 C hC hectocoulomb
10−3 C mC millicoulomb 103 C kC kilocoulomb
10−6 C µC microcoulomb 106 C MC megacoulomb
10−9 C nC nanocoulomb 109 C GC gigacoulomb
10−12 C pC picocoulomb 1012 C TC teracoulomb
10−15 C fC femtocoulomb 1015 C PC petacoulomb
10−18 C aC attocoulomb 1018 C EC exacoulomb
10−21 C zC zeptocoulomb 1021 C ZC zettacoulomb
10−24 C yC yoctocoulomb 1024 C YC yottacoulomb
Common multiples are in bold face.

Source: http://en.wikipedia.org/wiki/Coulomb

I think it is 10^-6

Now i see it i typed Mc instead of μC
Sorry
 
Tanya Sharma said:
Hi Tony Tesla...

Welcome to PF!

1mC = 10-3C , not 10-6C

Please recheck your calculations.

I see now, I ment μC not mC sorry.
 
Tony Tesla said:
I see now, I ment μC not mC sorry.

Even then your calculations are wrong.

Recheck...
 
Tanya Sharma said:
Even then your calculations are wrong.

Recheck...

checked it 5 timed every time the answer was 7.1904 N
After that i went to this page: http://www.endmemo.com/physics/coulomb.php
and the answer there was also 7.1904 N
 
The solution for the force is correct if the charges are given in μC .

ehild
 
ehild said:
The solution is correct if the charges are given in μC .

ehild

Thank you
 
Yes...your solution is correct.I misread the given data.
 

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