# Math Help - Physics problem

1. ## 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?

2. Originally Posted by BiGpO6790
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