Posted by Dan on Wednesday, April 6, 2011 at 10:22pm.
m=mass[gr]
V=Volume[cm^3]
rho=densty[gr/cm^3]
1cm=10mm
1mm=1/10 cm
1mm^3=(1/10)^3=1/1000=0.001cm^3
V=20*0.001=0.02 cm^3
m=V*rho=0.02*3.52=0.0704 gr
P.S.
rho is small Greek letter rho
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