Calculating Specific Volume from a Question: Tips & Tricks

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Homework Help Overview

The discussion revolves around calculating specific volume in a context involving a stone submerged in water. Participants are trying to clarify whether to use the volume of the stone or the volume of water displaced in their calculations.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are questioning the correct volume to use for calculating specific volume, debating between the volume of the stone and the volume of water displaced. There is also discussion about the relationship between specific volume and density.

Discussion Status

Multiple interpretations of the problem are being explored, with some participants suggesting different formulas based on the weight of the material and the volume displaced. Guidance has been offered regarding the definitions of specific weight and specific volume, but no consensus has been reached.

Contextual Notes

There is uncertainty regarding the values to use in calculations, specifically whether to divide by (25 / 9.81) or (20 / 9.81), as well as the lack of a definitive answer provided by the original question's author.

foo9008
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Homework Statement


how to calculate the specific volume in this question ? the author didnt gave the ans though.
Should i take the volume displaced by the water or volume of the stone ?
the specific volume is given by the formula v= V / m

Homework Equations

The Attempt at a Solution

 

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foo9008 said:

Homework Statement


how to calculate the specific volume in this question ? the author didnt gave the ans though.
Should i take the volume displaced by the water or volume of the stone ?
the specific volume is given by the formula v= V / m

Homework Equations

The Attempt at a Solution

There's a relationship between specific volume and density you should know:

https://en.wikipedia.org/wiki/Specific_volume
 
foo9008 said:
Should i take the volume displaced by the water or volume of the stone ?
the specific volume is given by the formula v= V / m

what do you mean by " the volume displaced by the water " in the above. if you mean volume of water displaced by the stone- then its equal to volume of the stone as it is dipped in water.
 
drvrm said:
what do you mean by " the volume displaced by the water " in the above. if you mean volume of water displaced by the stone- then its equal to volume of the stone as it is dipped in water.
So , specific volume = volume displaced / (25 / 9.81) or volume displaced / (20 / 9.81) ?
 
The specific weight (also known as the unit weight) is the weight per unit volume of a material
i think you are given the wt. of the material so divide by volume of the displaced water
 
drvrm said:
The specific weight (also known as the unit weight) is the weight per unit volume of a material
i think you are given the wt. of the material so divide by volume of the displaced water
which one is correct ? volume displaced / (25 / 9.81) or volume displaced / (20 / 9.81) ?
 
the specific volume of a substance is the ratio of the substance's volume to its mass. It is the reciprocal of density and an intrinsic property of matter as well.
 
drvrm said:
the specific volume of a substance is the ratio of the substance's volume to its mass. It is the reciprocal of density and an intrinsic property of matter as well.
so, it should be volume displaced / (25 / 9.81) ??
 
foo9008 said:
so, it should be volume displaced / (25 / 9.81) ??
by the above definition it should be
 
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