a) What is the energy released in the fusion reaction 21H + 21H → 42He + Q?
b) The Earth's oceans have a total mass of water of 1.50∙1016 kg, and 0.0300% of this quantity is deuterium, 21H. If all the deuterium in the oceans were fused by controlled fusion into 42He, how many joules of energy would be released?
c) World power consumption is about 1.00 ∙ 1013 'W. If consumption stayed constant and all problems arising from ocean water consumption (including those of political, meteorological, and ecological nature) could be avoided, how many years would the energy calculated in part (b) last?