Help with Algebra: Circuits & Equations

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The discussion revolves around a request for help with algebra, specifically related to circuits and equations. The original poster is struggling with a specific equation involving multiplication and common denominators, indicating confusion about the steps taken. A participant points out potential errors in the multiplication process and questions the correctness of the denominator used in the equation. They suggest that a clearer view of the entire problem is needed to provide accurate assistance. Overall, the conversation emphasizes the importance of careful setup and attention to detail in algebraic equations.
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Please look at the attached Microsoft word document because I don't know how to write out everything in this template. I need help with algebra, thanks!
 

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What is the What?

What is the question you are trying to answer?
(The zeroth step in answering a question.)

:cool:

~A137
 
When you were trying to multply through in the common denominator step,
-132E-33I3(330R) - 20I3(200R) -20E = I3
660R
it looks like you are multplying twice? :confused: I don't understand what you are doing there. Also, your denominator isn't correct, what does R*R give you? Be very careful with your signs.

It would help to see the entire problem, especially since I didn't get the same answer as your instructor. Maybe you haven't set up the equation properly?
 
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The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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