Relative weights in air and water

AI Thread Summary
When two solid pieces, one of steel and one of aluminum, are immersed in water, they exhibit equal weights due to buoyant forces acting on them. However, when weighed in air, aluminum appears to weigh more, which can be attributed to differences in density and volume. The discussion emphasizes the importance of Archimedes' Principle, which relates the weight difference in air and water to the upthrust experienced by the objects. Without specific information on the volumes and densities of the solids, further analysis is limited. Understanding these factors is crucial to resolving the apparent discrepancy in weights.
ScifiGen
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Homework Statement


Two solid pieces, one of steel and the other of aluminium when completely immersed in water have equal weights. When these solid pieces are weighed in air, aluminium seems to weigh more. Why is this so? On what factors in this being decided?[/B]

Homework Equations

The Attempt at a Solution

 
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ScifiGen said:

Homework Statement


Two solid pieces, one of steel and the other of aluminium when completely immersed in water have equal weights. When these solid pieces are weighed in air, aluminium seems to weigh more. Why is this so? On what factors in this being decided?[/B]

Homework Equations

The Attempt at a Solution

You need to show an attempt at a solution.

What do you know? Where are you stuck?
 
SammyS said:
You need to show an attempt at a solution.

What do you know? Where are you stuck?
The relevant principle , I think , is the Archimedes' Principle.
According to it, weight in air-weight in liquid=Upthrust experienced.
Weight in liquid is the same for both, There is no information about volume or upthrust experienced of the solids.
So, I'm pretty much stuck too...
 
There is no information about volume or upthrust experienced of the solids.
There is some information in the given
When these solid pieces are weighed in air, aluminium seems to weigh more
which -- when properly dealt with in your relevant equation -- can help you further.
 
It might help if you create symbols for the unknown densities and volumes of the two objects. You can then express the facts you are given as equations and inequalities and see what you can deduce.
 

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