Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 142 km long, 37.3 km wide, and 177 m thick. (a) How much heat in joules would be required to melt this iceberg (assumed to be at 0 "C) into liquid water at 0 "C? The density of ice is 917 kg/m . (b) The annual energy consumption by the United States in 1994 was 9.3x 1019 J. If this energy were delivered to the iceberg every year, how many years would it take before the ice melted? (a) Number i Units (b) Number i Units Yr