Understanding Circuits: Calculating Velocity at 25.5 km/h

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The discussion revolves around the calculation of velocity in a circuit, specifically questioning why it is stated as 25.5 km/h instead of a round figure like 25 km/h. Participants express confusion over the potential error in the resource being referenced, suggesting it may be a simple mistake. The age of the website, being over ten years old, raises concerns about the accuracy of its content. Overall, the conversation highlights the importance of verifying educational resources for clarity and correctness. Accurate information is crucial for understanding fundamental concepts in circuits.
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http://library.thinkquest.org/10796/ch2/Img00003.gif

I was looking on a resource to help explain to me the concept of circuits.. Then realized that it's almost as if my teacher has plagiarized from this site for his lesson plan..:smile: Anyhow, just going over the old lessons of the site..

How do they calculate the velocity to be 25.5 km/h? Simple mistake, I'm hoping?
 
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simple mistake indeed.
 
you mean why is it 25.5 instead of 25? I think that's clearly a mistake unless I'm not catching something
 
Just making sure.. Wonder why they would have a mistake like that for a 10 year old site.
 
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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