New Year

Have a Happy and Safe New Year. Looking forward to working with (nearly) all of you in 2010.

Have a Happy and Safe New Year. Looking forward to working with (nearly) all of you in 2010.

.... and keep thinking physics, its what's all around you.

Honors Assignment on Magnetic Fields and Forces

Read the notes posted here. Answer the sample questions up to but not including the ones on Magnetic Induction - except the generator groups, you get to do it all.

I'll try to write some notes on plasma particle and energy loss in the next day or two, so make sure you stay tuned.

http://h1.ripway.com/DrCherdack/Notes%20on%20magneticsR8.doc

Honors Fusion Power Plant

I will try to post notes and problems on plasma, heat transfer, thermodynamics, magnetics, and structures on a general level so you all can have an overall grasp of the physics behind the entire plant. As you may imagine, this may take some time so keep checking this space. At this point I believe, each group should have some understanding of their own specialty from reading notes and the relevant passages in your text. You should be meeting.

By the way, the I in magnets is current, i.e. amps or Coulombs per second; and NOT impulse (which of course is J for Jimpulse).

Archimedes Lab

Many of you folks still miss the point. We did not need to use a lab to find a number we can get out of a table, e.g. the density of the brass block. The purposes of our labs are almost always to confirm an hypothesis we formed from observation and translated into equations or one we derived from other related observations and proved hypothesis.

The main purpose of this lab was to demonstrate that FB = rho g Vol sub. If, by using a volume obtained using this equation, we got the right density, then the equation is correct. Errors of a few percent in the measured vs expected value of density offer pretty compelling confirmation of our equation, i.e. Archimedes principle

The second purpose was to try to verify that change in height of a fluid changes the pressure in a vessel according to delta P = rho g delta h. Many of you were much more succesful in this than I expected, getting errors of 10 % and lower. Good work.

AP Break Package

Here is a link for the first part of the package. Make sure you read the handwritten notes for the oscillation questions ('95 questions 1 c and d). Also skip the '94 question you are not ready for it. [it just kind of snuck in there].

http://h1.ripway.com/DrCherdack/APDecBrkPckg.PDF

Greetings

Hope this Christmas has been a a happy one for you. While this time has a particular meaning for those who celebrate Christmas, this break in our usual pattern of life is a good time for all of us to think about those people who, and those things that, make life worthwhile... and I don't mean Brad Pitt or new ipods.

Make the best of this time and I'll save my tirades about your lab reports for some other time.

AP Assignment

Complete the review package by tomorrow morning,. It will be counted as 6 homeworks.


All right; stop your whining; its due Monday right after break.

For those who were out, here's a link to part of it. I may get the rest up soon or even during the break so keep checking.

http://h1.ripway.com/DrCherdack/AddlMechRevQuest08-9.doc

Honors Assignment

Read the notes and do the problems in the notes and WS1 tonight.

http://h1.ripway.com/DrCherdack/Reaction%20Rates.doc

http://h1.ripway.com/DrCherdack/Nuclear%20Reaction%20Rates%20WS%201.doc


http://h1.ripway.com/DrCherdack/Nuclear%20Reaction%20Rates%20WS%202.doc

AP Package

There is a two part Mechanics Review package in your out file. Make sure you get both pieces. You'll be doing it over break and its worth 6 homeworks

Honors Homework

Assume:
electric power needed is 750 MW,
efficiency of conversion of fusion power to electricity is 45 %
plasma volume is 200 cubic meters
energy per reaction is 2.9 E-12 J
assume nD = nT = 1/2 of N fuel [ number of fuel nuclei per cubic meter]
sigma v is 7 E-22 cubic meter per sec [yes these are the units for the reasulkts to come out correctly]

Find the following:
fusion power required
fusion power per cubic meter of plasma
reactions/ ( cubic meter sec) required
nD , nT

20 extra credit points if you get it right, show all work and DON"T just copy

Fluid Review Solutions

Hopes this helps

http://h1.ripway.com/DrCherdack/Soln%20Sh%20Fluid%20Dynamicsr1.doc

Honors

We will be spending the next three days on projects. You will also have a large assignment on your project over the break.

Your assignment for Monday is:

All re-read the relevant sections of the European power plant report. This means the summary and whatever annexes apply to your specialty.

Plasma and blanket groups have some real meat to digest right in the report. Plasma group, identify density (number of fuel nuclei per m cubed), volume of plasma and confinement time. Start to understand energy and particle loss mechanisms.

Heating group should go back to the ITER website and be clear on power, energy, currents, type of ions, etc. You should also be clear on microwave heating including the ion and electron cyclotron frequencies and powers produced for ITER.

Magnet group. Make sure you understand the directions and purposes of the OH, Toroidal , and Poloidal fields and the configuration of the coils that produce them.

Read these notes [don't panic we will go over them in class]:

http://h1.ripway.com/DrCherdack/Notes%20on%20magneticsR6.doc

http://h1.ripway.com/DrCherdack/TokamakFields.doc

Plasma group read the above notes also.

Thermo group. Read this

http://h1.ripway.com/DrCherdack/Notes%20on%20Steam%20Cycles.doc

and then look in text to understand thermal conduction. Heat must be transferred from lithium to water/steam by passing through tubes containing the water/steam that are immersed in the lithium. Find the equation for this heat transport and figure out the following: assume the tube wall is 1 cm thick. Assume the temperature difference between the water/ steam and the lithium is about 200 C. How many square meters of surface area are required to transport 2.5 E9 Watts of thermal power. Look up Rankine cycle and steam turbines. Identify 4 web pages that will help you design your turbine cycle.

Generator group: read text on magnetic fields and magnetic induction. Know Faraday's Law and what it means. If the changing field goes from +B to-B in 1/120 th of a second, and the coils that the voltage is being induced in have 100 turns and a coil area of 2 m square, what is the required value of magnetic field strength B to produce 20,000 V in the coil. The coil will be wrapped around soft iron so mu is not mu 0, its about 1000 mu 0 ( mu is the greek letter that looks like a fancy u).

E mail

You guessed it: can't reach our school email again.

AP Fluids Problem Sheet

This is a newer version of the fluids problems which addresses some refinement of the wording of some problems, etc.

http://h1.ripway.com/DrCherdack/Unit%207%20AP%20Prob%20Sh-06R2.doc