Given the following information: Mass of proton = 1.00728 u Mass of neutron = 1.00866 u Mass of electron = 5.486 x 10 4 u Speed of light 2.9979 x 108 m/s Calculate the nuclear binding energy of S, which has an atomic mass of 33.9679 u. (1 u 1.6605 x 10-27 kg) Binding energy J

When an electron and its anti-particle, a positron, collide, they annihilate each other. Calculate the energy released in this process, in J. (The positron mass is the same as the electron mass, namely 9.11 ×1031 kg.)

Macmillan l 30: F2 W S A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: #3 H 80 F3 mmand E D A GA $ X C 4 OOD 886 F4 R F % от ото 5 V F5 T G ^ 6 B F6 Y & 7 H 8 F7 U N 00 * 8 DII FB J L - ( 9 M K DD F9 O . V - ... I 4 F11 { [ option + = ? 11 1 F12 } ] half-lives delete return st

A student is surprised by her work. She feels that the nuclear binding energy is high for oxygen-16. Her work is as follows: Part 1: One neutron's mass is 1.008665 amu, while one proton's mass is 1.007276 amu. In oxygen - 16 there are 8 protons and 8 neutrons with a total mass of 16.127528 amu. (1.007276x8)+(1.008665x8)=16.127528 Part 2: Because the mass of oxygen-16 is 15.994915 amu, the difference between the mass of an atom and the sum of its protons and neutrons is the mass defect. The mass defect for oxygen-16 is 0.132613 amu. 16.127528-15.994915 0.132613 Part 3: The missing mass in oxygen-16 is converted to the nuclear binding energy using Einstein's equation E = mc². The amount of energy is 1.19x1016 J, which I think is too high. E = mc² = (0.132613) × (3.00 x 108)2=1.193×1016 J Which part of the solution was there an error? a) Parts 2 and 3. b) Part 3 only. c) Parts 1 and 2. d) No error.

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the binding 60 energy (in J) of a Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu. Speed of light = 27 3.00 × 108 m/s.) O 2.74 x 10-16 -28 9.12 x 107 O 2.74 x 10-19 -13 4.94 x 107 8.20 × 10-11

9. Calculate the nuclear binding energy in MeV/nucleon for carbon-12. [Atomic masses (amu): carbon-12 = 12.00000; proton = 1.00728; neutron = 1.00867; electron = 0.00055; 1 amu = 1.6605 x 10-27 kg; speed of light = 3.00 x 108 m/s; 1 MeV = 1.60 x 10-13 J] %3D %3D %3D

226 226 The decay constant, k, for Ra is 1.37 x 10-11 s-1. What mass of 88 Ra has an activity of 1.06 x 109 atoms/s? 88

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