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)
im guessing we should be using the gravitational equation
g = (GM)/r^2 for different shells (might be wrong)
g= gravitational acceleration
G= Gravitational constant
M = mass of sphere with radius of "r"
The Attempt at a Solution
i tried the above equation but got no where with this. i need help!!!