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A lamina occupies the part of the diskin the first quadrant. Find the center of mass if the density at any point is proportional to the square of its distance from the origin.
A lamina occupies the region inside the circlebut outside the circle. Find the center of mass if the density is inverse proportional to the distance from the origin.
A lamina occupies that part of the diskin the first quadrant, the density is proportional to the square of the distance from the origin. Find the moments of inertia: ,and.