A cube, 1.0-in. long on each side, is constructed of equal-sized, alternating parallel layers of copper and Pyrex glass. There are five layers of copper and five layers of glass. A question has arisen whether this cube would be a better conductor of heat (for a fixed overall ΔT) if it were oriented so that heat was conducted parallel to the alternating layers or normal to them. Find the ratio of the heat conduction rates for the two different orientations.