Miners discover a new vein of metal in the mine they are excavating. they send a sample to your lab so you can determine what type of metal it is. you heat up a 2 kg block of the unknown metal from room temperature of 298 k until it melts at 1768 k. you measure that it takes 1.24 x 10^6 j of energy to melt the block. use the specific heats of various metals shown below to determine what metal the miners have discovered. aluminum: 904 j kg-1 k-1 nickel: 445 j kg-1 k-1 copper: 384 j kg-1 k-1 cobalt: 421 j kg-1 k-1 titanium: 520 j kg-1 k-1 a. cobalt b. copper c. aluminum d. nickel