Homework Statement
Calculate the radius of the Earth's core using the following data:
Pe = 5,515 kg/m^3 (earth's average density)
Pc = 11,000 kg/m^3 (core's density)
Pm = 4,450 kg/m^3 (mantle-crust density)
Re = 6377km (radius of the earth)
Homework Equations
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