According to one estimate, there are 4.4 x 106 metric tons of world uranium reserves extractable at $130/kg or less. About 0.70% of naturally occurring uranium is the fissionable isotope 235U. (a) Calculate the mass of 235U in this reserve in grams. (b) Find the number of moles of 235U and convert to a number of atoms. (c) Assuming 208 MeV is obtained from each reaction and all this energy is captured, calculate the total energy that can be extracted from the reserve in joules. (d) Assuming world power consumption to be constant at 1.5 x 1013 J/s, how many years could the uranium reserves provide for all the world’s energy needs using conventional reactors that don’t generate nuclear fuel? (e) What conclusions can be drawn?

Another series of nuclear reactions that can produce energy in the interior of stars is the cycle described below. This cycle is most efficient when the central temperature in a star is above 1.6 × 107 K. Because the temperature at the center of the Sun is only 1.5 × 107 K, the following cycle produces less than 10% of the Sun’s energy. (a) A high-energy proton is absorbed by 12 C. Another nucleus, A , is produced in the reaction, along with a gamma ray. Identify nucleus A decays through positron emission to form nucleus B. (c) Nucleus B absorbs a proton to produce nucleus C and a gamma ray. Identify nucleus C absorbs a proton to produce nucleus D and a gamma ray. Identify nucleus D. (e) Nucleus D decays through positron emission to produce nucleus E. Identify nucleus E. (f) Nucleus E absorbs a proton to produce nucleus F plus an alpha particle. What is nucleus F ? Note: If nucleus F is not 12C—that is, the nucleus you started with—you have made an error and should review the sequence…

How much energy can be released in total from 0.895 kg deuterium by the fusion reaction above if the neutron mass is 1.00866 u?

(a) For the nuclei N and o, determine the difference in binding energy per nucleon (in MeV). (Let the mass of a proton be 14 1.0078 u, the mass of a neutron be 1.0087 u, the mass of N be 14.0031 u, and the mass of O be 14.0086 u.) MeV (b) This difference in binding energy is due to which of the following? 14 Greater proton attraction for the 0 nucleus 14 Greater neutron attraction for the O nucleus 14 Greater electron attraction for the 0 atom Greater proton repulsion for the o nucleus O Greater electron repulsion for the O 14 O atom 14 O Greater neutron repulsion for the o nucleus

On absorption of a single neutron, plutonium Pu-239 can undergo fission into xenon Xe-134 plus zirconium Zr-103 plus three neutrons. The masses of these nuclei are, mpu-239 = 239.052 amu, mxe-134 = 133.905 amu, and mzr-103 = 102.927 amu. Calculate the energy given off in this nuclear reaction. Back Alt+Left arrow

A neutron generator uses an α source, such as radium, tobombard beryllium, inducing the reaction4 He + 9Be → 12C + n . Such neutron sources are called RaBe sources, or PuBe sources if they use plutonium to get the α s. Calculate the energy output of the reaction in MeV.

(a) For the nuclei B and C, determine the difference in binding energy per nucleon (in MeV). (Let the mass of a proton be 1.0078 u, the mass of a neutron be 1.0087 u, the mass of ¹B be 11.0093 u, and the mass of C be 11.0114 u.) Mev (b) This difference in binding energy is due to which of the following? O Greater electron attraction for the ¹C atom O Greater electron repulsion for the C atom Ⓒ Greater neutron attraction for the C nucleus O Greater neutron repulsion for the C nucleus O Greater proton attraction for the C nucleus O Greater proton repulsion for the C nucleus

How many kilograms m of uranium-235 must completely fission spontaneously into 140Xe, "Sr, and three neutrons to produce 1300 MW of power continuously for one year, assuming the fission reactions are 25% efficient? kg m =

29. The fission properties of 239 94 Pu are very similar to 235 those of 92 U. The average energy released per fission is 180 MeV. How much energy, in MeV, is released if 239 all the atoms in 1 kg of pure 24 Pu undergo fission? 94

Suppose enriched uranium containing 3.70% of the fissionable isotope 23592U is used as fuel for a ship. The water exerts an average friction force of magnitude 2.50  105 N on the ship. How far can the ship travel per kilogram of fuel? Assume that the energy released per fission event is 208 MeV and the ship's engine has an efficiency of 20.0%.    please  answer should be in km