As computer processor speeds increase, it is necessary for engineers to increase the number of circuit elements packed into a given area. Individual circuit elements are often connected using very smail copper "Wires" deposited directly onto the surface of the chlp. In some processors, these copper interconinects are about 45 nm wide. What mass of copper (in 9 ) would be in a 1.0mm length of such an interconnect, assuming a square cross section. The density of copper is 8.96g/cm3