Each fusion reaction of deuterium (2H) and tritium (3H) releases about 20.0 MeV. The molar mass of tritium is approximately 3.02 g. What mass m of tritium is needed to create 1012 J of energy, the same as that released by exploding 250 tons of TNT? Assume that an endless supply of deuterium is available.

In the fusion reaction H+H He + n the masses of deuteron, helium and neutron express ed in amu are 2.015, 3.017 and 1.009 respectively. If 1 kg of deuterium undergoes complete fusion, find the amount of total energy released. 1 amu = 931.5 MeV/c.

Consider the following decay: 232 U → 228 Th + a . 232 U has a mass of 232.0371562 u, 228 Th has a mass of 228.0287411 u, and a has a mass of 4.002603 u. 92 90 92 90 Determine the disintegration energy (Q-value) in MeV. Q = Determine the KE of the daughter in MeV. KED = Determine the KE of the a particle in MeV & as a factor of Q. KE, = KEa = Qx Determine the speed of the a particle in terms of c. For an a particle, E. = 3.727 GeV. [NOTE: G stands for giga- which means 109 & M stands for mega- which means 10°.] Valpha = XC

Block A rests on a horizontal tabletop. A light horizontal rope is attached to it and passes over a pulley, and block B is suspended from the free end of the rope. The light rope that connects the two blocks does not slip over the surface of thè pulley (radius 0.080 m) because the pulley rotates on a frictionless axle. The horizontal surface on which block A (mass 3.70 kg) moves is frictionless. The system is released from rest, and block B (mass 6.00 kg) moves Part A What is the tension force that the rope exerts on block B? downward 1.80 m in 2.00 s. Express your answer with the appropriate units. HÁ TB = Value Units Submit Request Answer Part B What is the tension force that the rope exerts on block A? Express your answer with the appropriate units. HẢ 王新 TA= Value Units

B1a) A nuclear power station delivers 1 GW of electricity for a year from uranium fission. Given that a single fission event delivers about 200 MeV of heat, estimate the number of atoms that underwent fission, their mass, and the loss of mass of the fuel elements. b) Uranium 238 has a half-life of about 4.5 billion years. All the 238U now on Earth was created in stars and has been here since the formation of Earth about 4.5 billion years ago. Consider a kilogram of pure 238 U present at the formation of the Earth. i) Calculate the activity of the kilogram at that time. Sketch a graph of the activity of the uranium since then to the present day. Label the axes with appropriate numbers and units. Mark on your graph the half-life and the characteristic decay time. ii) 238 U decays through a chain of thirteen very short-lived radionuclides (longest half- live only 1600 years) before reaching a stable isotope of lead. If what remains of this uranium has for the last few million years been…

B3. In the alpha decay of uranium 232U → 228Th + He, how much kinetic energy (in MeV) will 90 the thorium atom have. Given that Q = 6.46 MeV and the atomic mass of 220Th is 228.028731u. Express the values to 3 significant figures, if necessary.

Large amounts of depleted uranium (238U ) are available as a by-product of uranium processing for reactor fuel and weapons. Uranium is very dense and makes good counter weights for aircraft. Suppose you have a 4000-kg block of 238U . How many calories per day are generated by thermalization of the decay energy?

Calculate the equivalent energy of one atom of beryllium (9.0 amu) in joules, using the conversion factors of 1 amu = 931.5 MeV and 6.25 x 10¹8 eV = 1 joule.

43. During a particular nuclear reaction, some mass is converted to energy. If the reactants in this process have 0.00562 u more mass than the products, calculate the energy of the products that comes from the reactants and characterize the reaction as endothermic or exothermic. A. 5.2 MeV, exothermic B. 5.2 MeV, endothermic C. 1.9 MeV, exothermic D. 1.9 MeV, endothermic

A beam of 6.76 MeV protons is incident on a target of 2713Al. Those that collide produce the following reaction. p + 2713Al  2714Si +1 + n (Neutral 2714Si has mass 26.986705 u.) Ignoring any recoil of the product nucleus, determine the kinetic energy of the emerging neutrons.  answer in MeV