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Math Help - Physics problem

  1. #1
    Junior Member
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    Physics problem

    I am very stumped with this problem and i would greatly appreciate some help:
    Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 7.637 g, is pressed into a leaf of 4.992 μm thickness, what is the area (in m2) of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.300 μm, what is the length (in m) of the fiber?
    Last edited by mr fantastic; August 31st 2009 at 04:40 AM. Reason: Changed post title (removed the word calculus)
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by BiGpO6790 View Post
    I am very stumped with this problem and i would greatly appreciate some help:
    Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 7.637 g, is pressed into a leaf of 4.992 μm thickness, what is the area (in m2) of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.300 μm, what is the length (in m) of the fiber?
    a) What is the volume of 7.637 gm of gold (convert that into cubic metres)? What is the volume of A square metres of gold 4.992\times 10^{-6} metres thick?

    b) What is the volume of a cylinder of radius 2.300 \times 10^{-6} metres and length (or height) L metres?

    CB
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