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## Homework Statement

Show that the center of mass of a uniform semicircular disk of radius R is at a point 4R/(3(pi)) from the center of the circle.

## Homework Equations

Total mass Center of mass = M rcm = m1r1 + m2r2 + ...

## The Attempt at a Solution

I do not know how to apply integration to this problem to find the center of mass. Help, please?