Modern Physics
2nd Edition
ISBN: 9780805303087
Author: Randy Harris
Publisher: Addison Wesley
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Chapter 8, Problem 41E
To determine
The minimum possible energy or five spin
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If all of the quarks combining to form a meson are in the ground state, what are the possible spins a
meson might have? Give an example particle (and describe its constituents) for each of your answers.
Problem 2. Assuming the scale factor a(t) evolves as a power law with time as
a(t) = (²-)",
where the power law index I > 0, and to is the age of the universe.
1. Derive an expression for the Hubble parameter H(z) as a function of to, I, and the redshift z at time t.
2. What is the age of the universe if I = 1/2 and Ho = 70 km/s/Mpc ?
3. For what value of I is the age of the universe equal to the Hubble time?
MASS OF A PROTON: 1.007825 U; MASS OF A NEUTRON: 1.008665 U
7. If we start with 8 million nuclei of a radioisotope with a half-life of 5 minutes.
How many nuclei will be remaining in 50 min?
8.
What are Fermions? Identify 3 different aspects and give an example.
9. (
What is the difference between a particle and its antiparticle? What is
the antiparticle of electron?
1
Chapter 8 Solutions
Modern Physics
Ch. 8 - A dipole without angular momentum can simply...Ch. 8 - Prob. 2CQCh. 8 - Prob. 3CQCh. 8 - Prob. 4CQCh. 8 - Prob. 5CQCh. 8 - Prob. 6CQCh. 8 - Prob. 7CQCh. 8 - Prob. 8CQCh. 8 - Prob. 9CQCh. 8 - Prob. 10CQ
Ch. 8 - Prob. 11CQCh. 8 - Prob. 12CQCh. 8 - Prob. 13CQCh. 8 - Prob. 14CQCh. 8 - Prob. 15CQCh. 8 - Lithium is chemically reactive. What if electrons...Ch. 8 - Prob. 17CQCh. 8 - Prob. 18CQCh. 8 - Prob. 19CQCh. 8 - Prob. 20CQCh. 8 - Prob. 21CQCh. 8 - Prob. 22CQCh. 8 - Prob. 23CQCh. 8 - The total-spin singlet state for two electrons has...Ch. 8 - Prob. 25ECh. 8 - Prob. 26ECh. 8 - Show that the frequency at which an electron’s...Ch. 8 - Prob. 28ECh. 8 - Prob. 29ECh. 8 - Prob. 30ECh. 8 - Prob. 31ECh. 8 - Prob. 33ECh. 8 - Prob. 34ECh. 8 - Prob. 35ECh. 8 - Prob. 36ECh. 8 - Prob. 37ECh. 8 - Prob. 38ECh. 8 - Prob. 39ECh. 8 - Prob. 41ECh. 8 - Prob. 42ECh. 8 - The Slater determinant is introduced in Exercise...Ch. 8 - Prob. 44ECh. 8 - Exercise 44 gives an antisymmetricmultiparticle...Ch. 8 - Prob. 46ECh. 8 - Prob. 48ECh. 8 - Write the electronic configurations for...Ch. 8 - Prob. 50ECh. 8 - Prob. 51ECh. 8 - Prob. 52ECh. 8 - Prob. 53ECh. 8 - Prob. 54ECh. 8 - Prob. 55ECh. 8 - Prob. 56ECh. 8 - Prob. 57ECh. 8 - Prob. 58ECh. 8 - Prob. 59ECh. 8 - The well-known sodium doublet is two yellow...Ch. 8 - Prob. 61ECh. 8 - Prob. 62ECh. 8 - Prob. 64ECh. 8 - Prob. 65ECh. 8 - Prob. 66ECh. 8 - Prob. 67ECh. 8 - Prob. 68ECh. 8 - Prob. 69ECh. 8 - Prob. 70ECh. 8 - Repeat Example 8.6, but assume that the upper...Ch. 8 - Prob. 72ECh. 8 - Prob. 73ECh. 8 - Prob. 74ECh. 8 - Using J2=L2+S2+2LS to eliminate LS , as well as...Ch. 8 - A hydrogen atom is subjected to a magnetic field...Ch. 8 - Prob. 77ECh. 8 - Prob. 78ECh. 8 - Prob. 79ECh. 8 - Prob. 80ECh. 8 - Prob. 81ECh. 8 - As is done for helium in Table 8.3, determine for...Ch. 8 - Prob. 83CECh. 8 - Prob. 84CECh. 8 - Prob. 85CE
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- Problem 3. Consider a flat, single component universe. 1. For a light source at redshift z that is observed at time to, show that z changes at a rate dz dto = = Ho(1 + 2) — Ho(1+2)³(¹+w)/2 (2.1) 2. For what values of w does the observed redshift increase with time? 3. Assuming the single component is matter and Ho = 68 km/s/Mpc, you observe a galaxy at z = 1. Using Equation 2.1, determine how long you will have to keep observing the galaxy in order to see its redshift change by 1 part in 106.arrow_forwardBelieve it or not, neutrons are unstable particles. When beta decay occurs, the neutron transforms into a proton, an electron (and one other particle). Before the collision... What is the total electron lepton number? What is the total muon lepton number? What is the total tau lepton number? What is the total charge, in terms of e?arrow_forward1. Draw Feynman diagrams for the following processes and state whether it is a strong, weak or electromagnetic interaction Be sure to get the space and time axes correct. Ensure charge is conserved at each vertex. Each vertex usually consists of two fermions (quarks or leptons) and an exchange boson. Label all particles and get the arrows going the right way on them. In the case of mesons and baryons, show the quark composition. (i) μ΄ →e + De + U (ii) pº → π + π+ 0 (iii) πº → y + yarrow_forward
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