How to find the volume of a block that weighs 107 Newtons.

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Homework Help Overview

The discussion revolves around finding the volume of a block of silver that weighs 107 Newtons, with a given density of 10,500 kg/m³. Participants are exploring the relationship between weight, density, and volume in the context of physics homework.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need for density to calculate volume and question the correctness of the original poster's calculations. There is an exploration of unit conversions and the implications of using weight in Newtons to find mass.

Discussion Status

Some participants have provided guidance on the importance of unit consistency and encouraged the original poster to clarify their calculations. There is an ongoing examination of the assumptions made regarding the units of density and the calculations performed.

Contextual Notes

Participants note that the density was provided in a table, and there is a focus on ensuring that the units used in calculations align correctly with the physical quantities involved.

FoliagedPegas
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Just a problem for my physics homework and just wondering how to solve this problem.
 
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In order to find this, you need to know the density of the material.
 
Yeah I just figured out how to do it but now I am wondering if i got the right answer. the problem was what is the volume of a block of silver that weighs 107 Newtons with the block of silvers density being 10,500 kg. the answer I got for this problem is.001 m^3 but idk if its right XD
 
FoliagedPegas said:
Yeah I just figured out how to do it but now I am wondering if i got the right answer. the problem was what is the volume of a block of silver that weighs 107 Newtons with the block of silvers density being 10,500 kg. the answer I got for this problem is.001 m^3 but idk if its right XD

Welcome to the PF.

Remember that the density has units of mass per volume. Can you fix up the units and show us your work? That will make it easier for us to check your work.
 
berkeman said:
Welcome to the PF.

Remember that the density has units of mass per volume. Can you fix up the units and show us your work? That will make it easier for us to check your work.

Well, the exact question is A block of silver weighs 107 Newtons. What is the volume of the block? so I started by dividing the 107 by 9.81 to find the weight in kg and got 10.7. The density was given in a table and the density of silver is 10500 kg so i did 10.9/10500 and got .001 m^3 as my final answer.
 
FoliagedPegas said:
Well, the exact question is A block of silver weighs 107 Newtons. What is the volume of the block? so I started by dividing the 107 by 9.81 to find the weight in kg and got 10.7. The density was given in a table and the density of silver is 10500 kg so i did 10.9/10500 and got .001 m^3 as my final answer.

kg is a unit of mass, not density. Density has units of mass/volume, so the units for your density should be kg/(something). If you work out the units in your calculation, the answer doesn't work out to be in units of m^3, your answer is actually unitless.
 

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