Does Freezing Increase the Density of an Unknown Fluid?

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SUMMARY

The discussion centers on the relationship between freezing an unknown fluid and its density, specifically in the context of Archimedes' Principle. Participants assert that freezing typically leads to a decrease in volume for most substances, thereby increasing density. The equation presented, \(\frac{V_0}{V}=\frac{\rho}{\rho_0}\), illustrates the relationship between the volumes and densities before and after freezing. The conclusion drawn is that if the volume of the fluid decreases upon freezing, its density will increase, resulting in a greater proportion of the substance being submerged.

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  • Understanding of Archimedes' Principle
  • Basic knowledge of fluid mechanics
  • Familiarity with density and volume relationships
  • Concept of phase changes in materials
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Homework Statement


An unknown fluid is placed in a bottle and then placed in a beaker of water where it displaces x amount of water. The unknown fluid is then frozen into a block and a greater proportion of this substance is now submerged, what does this say about the change in density?


Homework Equations





The Attempt at a Solution


Am I right in thinking the density increases, there is no mention of what happens to the volume of the substance or the volume displaced?
 
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hi bobred! :smile:

well, you titled this Archimedes' Principle, how how about using the principle in your answer? :wink:
 
Yeah! bobred read the the statement of Archimede's principle carefully, you'll surely be able to solve then.
 
At equilibrium I have

\frac{V_0}{V}=\frac{\rho}{\rho_0}

what is confusing me is what happens to the unknown substance when it is frozen, does it expand or contract and therefore change the density \rho
 

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