E=mc Worksheet 1) Antimatter a) What is antimatter? Where is it found? Can it be artificially created? b) How much energy would be released if 1 kg of antimatter fell to the earth from outer space? Give your answer in units of megatons of TNT. How does this compare with the energy released by a large hydrogen bomb, about 10 megatons?c) Why don't we use antimatter as a source of energy in our power plants? 2) Nuclear Fission a) How much energy is released in the typical nuclear ssion reaction 3n + 23U > lgBa + gng + 3311? b) How much 235U is needed to supply ALL the energy used in the USA for a year? The USA uses about 1015 BTU each year. Calculate the number of 235 U nuclei required to ssion to release this much energy. c) Calculate (in kg) the mass of this much 235U. Remember, 235U has a mass of235 g/mole, and a mole of235U is 6 X 1023 nuclei. (1) What would be the volume of this much 235U'? The density of 235U is about 19,000 kg/ms. e) If the 23'5U was a solid cube, what would be the dimensions? Name something else about this size. f) Comment on how this amount of fuel compares with the lel required to obtain the same amount of energy from burning coal