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4. [3 pts] The mean density of Europa is 3.53 times the density of water and...

4. [3 pts] The mean density of Europa is 3.53 times the density of water and it has a radius of 1561 km. If we model Europa's interior as two components (a spherical core region with mean density 5 times water, and a liquid ocean outer shell with a mean density 1 times water), calculate the radius of the core and the thickness of the shell in km?

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