Finding the Density of a Solid Object in Water

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Homework Help Overview

The discussion revolves around determining the density of a solid object submerged in water, given its weight in air and the weight when submerged. The context involves concepts from fluid mechanics and buoyancy.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the relationship between weight, buoyant force, and volume. Questions arise regarding the use of buoyant force equations and the definition of variables such as the density of the object.

Discussion Status

Participants are actively discussing the application of Archimedes' Principle and the relationship between the forces involved. Some guidance has been offered regarding the buoyant force and its calculation, but multiple interpretations of the variables and equations are still being explored.

Contextual Notes

There is a mention of needing to clarify certain terms and assumptions, such as the density of the object and the implications of the buoyant force in the context of the problem.

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Homework Statement


A solid object has a weight of 17.22 N. When it is suspended from a scale and submerged in water, the scale reads 5.18 N. Find the density of the object (use ρwater = 1000 kg/m3).


Homework Equations


p = m/v


The Attempt at a Solution


I don't know how to figure this out without having the volume? Or does it have something to do with buoyant forces??
 
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If I use the buoyant force equation...
Fb = Po * Vo * g
then solve for V?
 
What is Po? If you use Archimedes' Principle, you'll get it immdtly. Refer to your other post. That's why I asked you to state it, at least.
 
Po is density of the object.
 
The reduction in force is equal to the upward buoyant force, which I have shown how to find in your other post.
 

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