Weight of copper hanging/submerged

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    Copper Weight
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Homework Help Overview

The discussion revolves around a physics problem involving the weight of a piece of copper when it is submerged in fresh water compared to when it is hanging from a scale. Participants are exploring concepts related to buoyancy and the forces acting on the object in different scenarios.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to understand the relationship between buoyancy and the forces acting on the copper when submerged. Questions about the definition of buoyancy and the relevant forces are raised, along with a suggestion to draw a free body diagram.

Discussion Status

The discussion is active, with participants sharing their thoughts and clarifying concepts. Some have expressed confusion regarding the units of measurement and the forces involved, while others are beginning to connect the concepts of buoyant force and weight. There is no explicit consensus yet, but progress is being made in understanding the problem.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There is also a noted misunderstanding regarding the measurement of volume, which is being addressed in the discussion.

Mattc
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A scale reads 220N when a piece of copper is hanging from it. What does the scale read when it is lowered so the copper is submerged in fresh water.

From a given chart

Density:
copper is 8930 kg/m^3
fresh water is 1000kg/m^3

I found my volume of copper to be .0025m^3

I'm just not sure which direction to go now?
 
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What forces are involved in buoyancy? Draw a free body diagram. Also write down the definition of buoyancy? Does anything click?
 
Since when was volume measured in Kg?
 
The forces involved are those from bottom and those on top of object. I have drawn the diagram and I think I know the connection I'm trying to make. The volume of the displaced fluid times density has to relate to the buoyant force? I think its the Newtons that's throwing me off
 
Integral said:
Since when was volume measured in Kg?

indeed my teach would've smacked me
 
geezzzz nevermind I got it. I thought i was looking over something simple.While obtaining the forces I was neglecting my 9.8m/s^2
 

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