Occasionally, huge icebergs are found floating on the ocean's currents. suppose one such iceberg is 142 km long, 25.3 km wide, and 198 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/m3. (b) the annual energy consumption by the united states in 1994 was 9.3 x 1019 j. if this energy were delivered to the iceberg every year, how many years would it take before the ice melted?