Suppose 2.7 centimeters of rain at 15 degrees Celsius falls on a rectangular field of dimensions 2.1 kilometers by 1.1 kilometers. The amount of energy released when water vapor condensed and cooled to form this rain is equivalent to how many Hiroshima-size atomic bombs? One such bomb has an energy equivalent of about 6.3 x 1013 joules. Assume the water vapor condensed from its minimum possible temperature.