Is There an Error in My Kirchoff's Loop Problem Solution?

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SUMMARY

The discussion revolves around verifying the current values calculated for a Kirchhoff's loop problem. The user initially provided their results as I1=-8.461, I2=-0.00392, and I3=-0.00477, which lacked proper units. After clarification, it was confirmed that the correct values should be I1=-8.461e(-4) Amps, I2=0.086 Amps, and I3=0.0017 Amps. The user was advised that the absence of units would lead to a loss of marks, emphasizing the importance of proper notation in physics calculations.

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  • Proficiency in using Ohm's Law (V=IR)
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mattwkeller
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Homework Statement


Find the currents going through each resistor.
media%2F2d8%2F2d84bb09-154d-41ef-a5d7-cc0215f3ad3a%2FphpMrLurv.png


Homework Equations



V=IR

The Attempt at a Solution


[/B]
media%2Fb0d%2Fb0da98b6-e7ee-454a-8e9e-b6c40181f50e%2FphpYUlKvm.png
I have the problem worked out and I can't find any errors in my work. The issue is that my professor has:

I1=-.0843
I2=.086
I3=.0017

However my physics professor is notorious to make errors in class and right sloppily, so I don't entirely trust his solutions. Can you find any error in my work/confirm my results? Sorry about the picture being sideways.
 
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Sorry, struggling getting the picture up...in the meantime my answers are:

I1=-8.461
I2=-.00392
I3=-.00477
 
image11_zps570405bb.jpg
 
Your answers are missing units, making it difficult to say whether they are numerically correct. You'd definitely lose marks though for not showing units.

Assuming your results are in Amps then I2 and I3 look to be correct numerically, but I1 is not... it's got the wrong order of magnitude. So check your calculation there.
 
Yes, sorry about that. They are in amps. I missed the scientific notation in my matrix. Should I1= -8.461e(-4)?
 
mattwkeller said:
Yes, sorry about that. They are in amps. I missed the scientific notation in my matrix. Should I1= -8.461e(-4)?
Yes, that's right.
 
Okay, thank you.
 

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