1. A composite slab has dimensions of d1=11.0cm, d2=2.80cm, and d3=13.0cm. Half the slab consists of aluminum (density=2.70g/cm^3) and half consists of iron (density=7.85g/cm^3). What are the x coordinate, y coordinate, and z coordinate of the slab's center of mass? There's a figure in my book where the dimensions are for each the iron and aluminum. In other words, if you find the volume using the dimensions they give you, if you double it you have the volume for the whole figure. I have no idea where to even begin. I found the volume for each piece to be 400.4g I tried finding the mass for each using p=m/v. For the aluminum I got m=(400.4cm^3)(2.70g/cm^3) = 1081.08g For the iron I got m=(400.4cm^3)(7.85g/cm^3) = 3143.17g No clue how to find x, y, and z.....help please!!