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A throphy has a mass of 3.85kg and a volume of 480cm3 -- Help please

  1. Apr 1, 2015 #1
    Find the density
     
  2. jcsd
  3. Apr 1, 2015 #2
    Find the density of the throphy
     
  4. Apr 1, 2015 #3

    rock.freak667

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    What is the definition of density?
     
  5. Apr 1, 2015 #4
    mass per unit volume as i know .
     
  6. Apr 1, 2015 #5

    rock.freak667

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    Right, so if you are given a mass of 3.85 kg and a volume of 480 cm3, what would be the mass per unit volume?
     
  7. Apr 1, 2015 #6
    how can you work it out?
     
  8. Apr 1, 2015 #7

    rock.freak667

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    Were you taught the concept of density and the formula associated with it?

    If meter per second means 1 m divided by 1 s, what what mass per unit volume give?
     
  9. Apr 1, 2015 #8
    its p=m/v how can I find the density?
     
  10. Apr 1, 2015 #9

    rock.freak667

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    what do m and v represent in your equation?
     
  11. Apr 1, 2015 #10
    mass and volume...
     
  12. Apr 1, 2015 #11

    rock.freak667

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    Good. And you are told mass = 3.85 kg and volume = 480 cm3, so if you put those values into your formula, what do you get?
     
  13. Apr 1, 2015 #12
    I have to divide them? Then it says that gold has a density of 19,000kg/m3 . Is the throphy made out of real gold
     
  14. Apr 1, 2015 #13

    rock.freak667

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    Yes you have to divide them. If you are given those values and your density doesn't match up to 19,000 kg/m3, then it isn't made out of real gold.
     
  15. Apr 1, 2015 #14
    so 3.85 divide 480 = 8.02083333 <--- density... so not real gold
     
  16. Apr 1, 2015 #15

    rock.freak667

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    Yes, but don't forget your units. You divided kg by cm3, so your units are kg/cm3
     
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