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Two concentric uniform thin spherical shells have masses M1 and M2 and radii a and 2a....

Two concentric uniform thin spherical shells have masses M1 and M2 and radii a and 2a. The inner spherical shell is shifted so that its center is now on the x axis at x = 0.8a. What is the magnitude of the gravitational force on a particle of point mass m located on the x axis at the following? (Use any variable or symbol stated above along with the following as necessary: (a) x = 3a

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