How effective is Charles' Law in determining absolute zero?

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Charles' Law is a method used to estimate absolute zero by observing the behavior of gases as they cool. The discussion revolves around comparing this method to others, such as the Carnot engine, though there is uncertainty about its complexity and relevance to the course material. Participants express a need for alternative methods to determine absolute zero that are more aligned with the curriculum. The request for shared resources indicates a collaborative approach to understanding the topic better. Overall, the conversation highlights the challenges of grasping advanced concepts while ensuring academic integrity.
Foofistan
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Homework Statement


Okie so I'm working on my physics work, and I need to compare Charles' Law (for finding absolute zero) to another method used to calculate absolute zero.

3. Attempt at the Solution
For this, I was thinking of looking at Carnot engine, but I absolutely do not understand and while I have looked at sources online, I think that my examiners might think I copied it off online because it goes beyond my course. Does anyone have any ideas on other methods used to find absolute zero?
 
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Foofistan said:

Homework Statement


Okie so I'm working on my physics work, and I need to compare Charles' Law (for finding absolute zero) to another method used to calculate absolute zero.

3. Attempt at the Solution
For this, I was thinking of looking at Carnot engine, but I absolutely do not understand and while I have looked at sources online, I think that my examiners might think I copied it off online because it goes beyond my course. Does anyone have any ideas on other methods used to find absolute zero?
Welcome to the PF. :smile:

I'd like to help, but I'm not that familiar with the different methods for finding 0K. Can you post some of the links you've found with your Google searches? Thanks.
 
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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