Question About Archimedes ? HELP

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Archimedes resolved the problem of the crown by determining its density through water displacement, confirming whether it was made of pure gold. The discussion also touches on the connection between this method and other fluid-related problems, although the oil and water question is not directly related. One participant expressed frustration over not being able to solve the oil/water problem, which is crucial for their class grade. The conversation highlights the challenges of understanding fluid dynamics in practical applications. Overall, the thread emphasizes the significance of Archimedes' principles in solving real-world problems.
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Question About Archimedes ? HELP!

How Did Archimedes Resolve the problem of the Crown ?
 
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oh, I saw a documentary on that. I think he dipped the crown in water, and found out depending on the water level, the density of the gold? This is related to your other post isn't it, the oil water question? What is it with all these fluid problems?
 
mathPimpDaddy said:
oh, I saw a documentary on that. I think he dipped the crown in water, and found out depending on the water level, the density of the gold? This is related to your other post isn't it, the oil water question? What is it with all these fluid problems?

Thanks for your help! :smile:
I "googled the topic and found what i was looking for!

No it's not related to the other problem, but it is in the same
chapter.

I couldn't resolve the oil/water problem i really needed it so i could have
40 points in my class which could help me get a C or B..
But what can i do!
 

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Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
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Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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