Homework Help: physics

Posted by Anonymous on Thursday, January 20, 2011 at 10:29pm.

can some one explain this

Assuming a gram of gold costs approximately $36, how many cubic centimeters of gold can you buy with a twenty dollar bill if the density of gold is 19320 kg / m3 ?

a)
0.029 cm3
b)
2.9 x 10-6 cm3
c)
0.56 cm3
d)
0.04 cm3

physics - drwls, Friday, January 21, 2011 at 12:25am
Twenty dollars will buy you 20/36 = 0.556 grams of gold at that price.

Calculate the volume that has that mass, buy dividing the mass by the density.

It will be easier if you convert the density to 19.32 g/cm^3

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