Need help finding the density in this particular problem

  • Thread starter Alexandra7
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  • #1
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Homework Statement


A particular object weighs 313 N in air and 254 N when immersed in alcohol of density 0.7 g/cm3. What are the volume and the density of the object?

Homework Equations


D=m/vL

The Attempt at a Solution


I found the volume by: 313-254 N to find the actual weight, then I divided it by 9.8 to get it into Kg, then I used the density formula to solve for volume which gave me 8.6L

So the volume is taken care of! 50% of the problem done :)!

As for the density, I'm confused because I thought I would just plug in my known values but it doesn't work. Can someone please guide me as to how I would find the density of this object? I greatly appreciate it!
 

Answers and Replies

  • #2
Orodruin
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Can you show what you do and get when you say "just plug in my values".
 
  • #3
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Can you show what you do and get when you say "just plug in my values".
6.02kg from the two forces/ 8.6L that I found out from part a) =D

but it doesn't :[
 
  • #4
Orodruin
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Which force represents the total weight of the object? What you are solving for above is the density of the alcohol.
 
  • #5
jacksonlee
Can you please solve the second part pleaseee, need it for an assignment thanks
 
  • #6
haruspex
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Can you please solve the second part pleaseee, need it for an assignment thanks
Usual forum rules... please post your attempt first.
 

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