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April 28 |
April 29 |
April 30 |
May 1 |
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(always done before class) |
examples
13-10,11 on pages 490-491 13(6) |
14(1) and 14(4, first 2 pages) on basics of nuclear fission |
finish
14(4) and continue through page 516 |
read
the lab, so you are prepared |
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things you should know the answer to before coming to class |
what isotopes are used to date a) the age of the earth (or other solar system objects) b) the age of the oldest human bones how/why C-14 dating works? why that isotope? how does C-14 get into things? |
questions
to know the answer to for class: does a single uranium fission produce the kinetic energy announced in the book? (a nice show/tell here) why does the uranium fuel have to be enriched in some reactors? how is the enrichment done? (i.e., how is U-235 separated from the more abundant U-238)? three methods -- all learned intro physics or chemistry should come to mind)! why does a U-235 require a slow neutron for fission? (you learned this in your first physics course!) how do you slow neutrons down? (you learned this in your first physics course!) |
same
questions as for wednesday be prepared to answer a few in depth (using physics!) |
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homework (written assignments to be turned in) |
1)
problem 7 from the relativistic
collision handout 2) 13(54a,c) |
1)
problems 3 & 9 from the relativistic
collision handout 2) 13(38) |
1)
problem 10 from the relativistic
collision handout 2) |
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make
sure that you have a rough value for the top quark mass (and the
neutrino momentum -- speed and direction) for class today (you can get back half of the points you lost friday if you do) lab E2 due today |
top
quark lab due we do |
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of the week |
| Monday, April 20 |
April 21 |
April 22 |
April 23 |
April 24 |
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cyclotron
applet |
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(always done before class) |
review 13(5) up through example 13.8 (which we supposedly have already read) |
the
sections in 13(5) on beta decay (although temporarily ignore the
section on carbon dating) and on gamma decay also 15(2) on antiparticles, plus the short section on Leptons in 15(4) |
pp.
560-561 on Baryon number and Lepton number (this should have been part of your reading for yesterday) reading for Thursday's lab: the discovery of the top quark: 1) 15(9) on quarks 2) Essay beginning on page 590: "How to find a top quark...." this is difficult reading, so you may have to skim in places.... the schematic on page 594 is important the reading is long, so please start early |
you should have already done the reading in
yesterday's slot... read the top quark mass lab handout |
13(4)
on the radioactive decay laws.... a really important -- and fairly long
-- section that will be the basis of our 3rd radioactivity lab next week what equations are the basic ones of section 13(4), i.e., which are you allowed to start a problem with? |
things you should know the answer to before coming to class |
please
do practice problems from the handout on relativistic collisions; whatever isnt done in class by mid-next-week will be assigned for homework |
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homework (written assignments to be turned in) |
deadline
for showing me your calculation of the v/c limit for which using the
Newtonian version of KE makes a less-than-1% error..... is tonight's tutorial.... don't wait till the very end! 13(51, 52) in each case, the problem means to ask you to calculate the total kinetic energy released in the reaction (as we discussed in class monday, remember that first the reaction must be written, then the conservation of charge, baryon number, lepton number, and only then conservation of mass-energy (which must include electron accounting) you may want to wait until after class tuesday to start this, although you should be able to do on your own (especially if you've had astrophysics) |
you
will be expected to have the neutrino momentum (and energy) from the
top quark lab done yesterday to present in class today 2 homework problems: 1) problem 13 from the relativistic collision handout and 2) ...on the recent quiz, I claimed that a S+ would decay as S+ --> n + p+ and I claimed speeds of 0.70c and 0.56c for the two decay products (in the center-of-mass frame).... I think I calculated these speeds incorrectly... find the correct speeds.... masses are in your text, table on page 557 |
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go
here to request a PDG
to request the Particle Physics Booklet.... please do not request
anything else.... since you are (probably) not on their mailing list,
you will have to click on the appropriate link to give them your
mailing address |
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start
working on E2: section 14(7) will be helpful in understanding how gamma rays interact with matter (your first physics course should be helpful on how electric charges -- alpha and beta particles -- interact with other charges section 14(7) assumes you have studied the phenomena (pair production, the photoelectric effect, the Compton effect) so you may have to go and read the sections on those phenomena also |
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of the week |
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April 6 |
April 7 |
April 8 |
April 9 |
April 10 |
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due by 8 pm YESTERDAY |
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quiz today on (chapters 1 - 2) |
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| what
we'll do in class |
details
of alpha decay and conservation laws |
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(always done before class) |
finish 13(2), an extremely important section, especially the end [you might also read section 15(3), which has a better version] 13(3) 13(5) up through example 13.8 |
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| in-class
presentation |
only
two more days left this week... no presentation on quiz day nor lab day |
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homework (by 5 pm) |
make sure that use obtain all masses from Appendix B check to make sure that your answer is consistent with fig 13.10 credit is somewhat dependent on how unique your calculation is (it's inversely proportional to how many other people choose the same one as you) only 1 problem because you are studying for the quiz, by doing problems out of the back of chapters 1 and 2 |
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which has a lengthy prelab , due at the beginning of lab web site for finding nuclei masses, half-lifes, etc. type the nucleus you're interested in inside the box at upper left corner... for example if you want info about carbon-12, type C-12 |
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