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steve816

  • one year ago

Please help me! The volume of a block of wood equals 78 cm^3 What is its volume in cubic inches?

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  1. anonymous
    • one year ago
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    2.54cm / inch 78cm^3*(1 inch/2.54cm)^3 The cm cancel out =78/(2.54^3)

  2. steve816
    • one year ago
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    I don't think that is right...

  3. anonymous
    • one year ago
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    Stoichiometry has a fancy name but it's very easy. Just like \[\frac{ 1 }{ 2 }*\frac{3}{3} = \frac{3}{6} \] You are multiplying your value by 1, because the value of numerator equals the denominator. And just keep doing it so units cancel out to the ones you want to result to. 2.54 cm = 1 inch and you keep canceling the cm until you get in^3 (and not 1/in^3)

  4. anonymous
    • one year ago
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    \[78cm^3\frac{ 1 inch }{ 2.54cm }\frac{1 inch}{2.54cm}\frac{1inch}{2.54cm}\]

  5. anonymous
    • one year ago
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    It's correct. If you have cm in the numerator and multiply it by something that has cm in the denominator, the cms cancel out.

  6. anonymous
    • one year ago
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    Thanks kestry, it's tough entering fractions on a phone

  7. steve816
    • one year ago
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    Thanks everyone for the help :) I think I understand it now!

  8. anonymous
    • one year ago
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    Haha, you answered the question so fast and well!

  9. anonymous
    • one year ago
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    Woo, thanks steve! Good luck on the rest of your hw

  10. steve816
    • one year ago
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    Thanks kestry! By the way, what are you working on kestry?

  11. anonymous
    • one year ago
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    I'm working on Calculus /cry

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