<PRE><B>Question 217415</B>
A solid ball of aluminum weighs 500 g, what is its radius?
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Several references give the density of Al = 2.7 gm/cc
Volume = mass/density = 500/2.7 cc
{{{Vol = 4*pi*r^3/3}}}
{{{500/2.7 = 4*pi*r^3/3}}}
{{{125 = 0.9*pi*r^3}}}
{{{r^3 = 125/(0.9*pi)}}}
{{{r^3 = 44.2097}}} (approximate)
r =~ 3.536 cm
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