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A unique star produces energy by nuclear fusion reactions, in which matter is converted into energy. By measuring the amount of energy we receive from that star, we know that it is producing energy at a rate of 4.8 x 10 ²⁶ How many kilograms of matter does this star lose each second?

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From Table 7.1 in College Physics, the energy released from the nuclear fission of 1.00 kg of uranium is 8.00 x 1013 J. What is the mass lost in this process? (hint: see #2 in the previous section) What is the % of the original mass, and how does this compare to fusion (your answer for #1 in the previous section)?
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A supernova explosion of a star with a rest mass of 1.97 x 1031 kg, produces 1.02 x 1044 J of kinetic energy and radiation.i) How many kilograms of mass are converted to energy in the explosion?ii) Calculate the ratio of the mass destroyed to the original mass of the star.
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