Verify by listing the number of nucleons, total charge, and electron family number before and after the cycle that these quanti?es are conserved in the overall proton—proton cycle in 2 e − + 4 1 H → 4 He + 2 v e + 6 γ .
Verify by listing the number of nucleons, total charge, and electron family number before and after the cycle that these quanti?es are conserved in the overall proton—proton cycle in 2 e − + 4 1 H → 4 He + 2 v e + 6 γ .
Verify by listing the number of nucleons, total charge, and electron family number before and after the cycle that these quanti?es are conserved in the overall proton—proton cycle in
There are three naturally occurring stable isotopes of magnesium: 24MB, 25MG, and 26MB, which have
relative abundances on Earth of 79%, 10%, and 11% respectively. Note that the atomic number of
magnesium is 12.
a) ) A magnesium-24 nucleus can be considered as nucleons uniformly distributed in a spherical
volume. Calculate the energy required to construct a uniformly charged sphere, using the following
2Q2
20πεο R
equation: U
where Q is the total charge and R is the radius.
ii) Calculate the binding energy (in eV) of magnesium-24, which has an atomic mass of 23.9850 AMU.
The mass of a neutron is 1.0087 amu and the mass of a proton is 1.0073 amu. Using your results
from parts (i) and (ii) discuss how the nucleus is held together.
b) The radioisotope of magnesium with the longest half-life is magnesium-28, with a half-life of 20.9
hrs. Magnesium-28 decays through B- decay into aluminium-28. With reference to fundamental
particles, describe the process which occurs in beta minus decay.…
Verify by listing the number of nucleons, total charge, and electron family number before and after the cycle that these quantities are conserved in the overall proton-proton cycle in
2e-+41H → 4He + 2Ve +6y .
A solid copper sphere whose radius is 1.0 cm has a verythin surface coating of nickel. Some of the nickel atoms areradioactive, each atom emitting an electron as it decays. Halfof these electrons enter the copper sphere, each depositing 100 keVof energy there.The other half of the electrons escape, each carryingaway a charge e.The nickel coating has an activity of 3.70 *10^8 radioactivedecays per second. The sphere is hung from a long, nonconductingstring and isolated from its surroundings. (a) How longwill it take for the potential of the sphere to increase by 1000 V? (b)How long will it take for the temperature of the sphere to increaseby 5.0 K due to the energy deposited by the electrons? The heatcapacity of the sphere is 14 J/K.
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.