Aluminium covered with gold submerged into water

Thread starter Artj0m
Start date Jan 15, 2015
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Aluminium Buoyancy Density Gold Submerged Water

AI Thread Summary

The discussion revolves around a physics homework problem involving an aluminum object covered in gold, submerged in water. Participants explore the relationship between the weight of the object, the tension on the spring balance, and the buoyancy effect. Key concepts include using density equations and Archimedes' principle to derive the weight of the gold covering. The conversation emphasizes guiding the student to understand the principles rather than providing direct answers. Ultimately, the goal is to formulate an equation that incorporates the weights and densities to solve for the weight of the gold.

Jan 17, 2015

mr166

BvU said:

I really don't understand how you can say that. Buoyancy is W-T and it definitely is an actual factor in the answer. And of course the density of the object is relevant. We worked out this whole thing by equating the ##\rho## of the object as expressed in terms of W, W_Au, ##\rho_{Al}## and ##\rho_{Au}## on one hand and in terms of ##\rho_{H_2 O}##, W, and W-T on the other.

Yes you are right since Buoyancy = weight of displaced fluid and I was using the amount of displaced fluid to measure the volume of the object.