What mass of a material with density rho is required to make a hollow spherical shell having inner radius r1 and outer radius r2? (use any variable or symbol stated above as necessary.)'

Explanation:

Then the mass of the material required to make such a sphere would be calculated as:

Total volume of the spherical shell:

And the volume of the hollow space in the sphere:

Therefore the net volume of material required to make the sphere:

Then the mass of the material used is:

answer: i pick a

explanation: