Question

1. Consider the solid in the first octant bounded by the coordinate planes, the plane x= 2,and the surface z= 9-y^2. The density is(x,y,z) = (x+ 1)(y+ 1)(z+ 1). Calculate the x,y, and z coordinates of the center of mass. Express your answer in decimal form.
2. Find Iz for the hollow cylinder (oriented along the z-axis) with inner radius R and thickness t. The base is the xy-plane, the height is h, and the density is(x,yz,) =kz^2.

Answer 1