The program for our Spring 2009 meeting/gathering is now available online.
Saturday March 28th, with a Friday evening social the day before. Everyone is invited, and first-time attendees are free. See the program for complete details.
The program for our Spring 2009 meeting/gathering is now available online.
Saturday March 28th, with a Friday evening social the day before. Everyone is invited, and first-time attendees are free. See the program for complete details.
March 7, 2009: Rio Americano High School (Sacramento area); Dean Baird & Steve Keith. Rio Americano HS Campus Map (PDF).
March 14, 2009: San Mateo High School (SF Peninsula); Paul Robinson & Dan Burns.
Complete workshops descriptions and registration information at PTSOS.org.
In addition to great presentations by PASCO (not strictly focused on their equipment), we’ll also offer our ever popular Show ‘n’ Tell–everyone is invited to bring a five minute presentation of your favorite lab, handout, website, or other teaching resource.
More details will be posted here shortly.
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Our Spring 2008 Meeting took place April 18–19 at Heritage High School in Brentwood. Check out the program! The SNAAPT petition (you can download it here) was voted upon by the 50 or so attendees and passed unanimously. We wish them luck!
Dean Baird, documentor and presenter extraordinaire, has assembled some cool stuff here. In includes links to:
And photos, of course!
The AAPT Online Career Center is now associated with the AIP, APS, and AVS Career Centers. You can submit a resumé free of charge on our site and your resumé is automatically entered into a searchable database to which employers have easy online access. Visit the AAPT Online Career Center at http://careers.aapt.org/search/.
Here is a flyer (400K, pdf) that describes the Career Center. You could give to the administrator at your school who is responsible for hiring new faculty.
>California State University at Fresno
Saturday, April 9, 2005
Don’t miss this talk!
In 1916 Einstein published a remarkable paper entitled “On the Quantum Theory of Radiation” - where he derived Planck’s formula for black-body radiation by a new statistical hypothesis for the emmision and absorption of electromagneic radiation based on discrete bundles of energy and momentum which we now call photons. Einstein radiation theory replaced Maxwell’s classical theory by a stochastic process, and in this talk I will show that it also gives the well known quantum statistics of massless particles with even spin . These statistics however, were not discovered by Einstein but communicated to him by Bose in 1924. Like Boltzmann’s classical counterpart, Einstein’s statistical theory leads to an irreversible approach to thermal equilibrium, but because this violates time reversal, Einstein theory can not be regarded as a fundamental theory of physical processs . Apparently Einstein and his contemporaries were unaware of this problem, and even today this problem is ignored in contemporary discussions of Einstein’s treatment of the black-body spectrum.
Last modified 15 March 2005.
Teachers are welcome to contact our President, Joe Tenn, for a letter of support to assist them obtaining funds and release time to attend this conference.
“He’s Losing His Momentum!” (11 am – 5 pm) Andria Erzberger, Mike Ugawa & other PTRA’s
Room S10, Gunn High School (see map below)
Do your students confuse momentum, force, and energy?
Do they understand what “conserved” means?
How can you do inexpensive labs for conservation of momentum?
Local teachers who are part of the national PTRA program will lead a 6-hour workshop on momentum and impulse Friday November 5. Based on state standards and modeling new ways to teach, it will address the often misunderstood topics of momentum, impulse, and Newton’s second law. You will go home with cheap but useful “make and take” equipment (colliding cars, rocket launcher, etc.).
The cost is $24 if the teacher pays, $48 if the school pays. Register by sending a check to: A. Erzberger, 47 Roosevelt Circle, Palo Alto, CA 94306. Deadline to sign up is October 27. Contact Andria with any questions and for more information.
Roger Blandford, director of the new KIPAC (Kavli Institute for Particle Astrophysics and Cosmology) at SLAC and Stanford will speak Friday evening. The talk and social will be held in the Panofsky Auditorium at SLAC. Time will be 6:00 for hors d’oeuvres and 7:00 for talk. Check in at the information booth when you enter the SLAC campus. Tell them you are there for the physics teacher social. Panofsky Auditorium is directly in front of you as you go past the information booth. (Click here for map to SLAC.)
SATURDAY, November 6, 2004
7:45 Registration, Coffee, Donuts, and other culinary delights
8:45 Welcome and Announcements
9:00 Show & Tell
Share your favorite demonstration or teaching tip. Since new teachers and section members will be at this meeting, you are encouraged to dust off some of your oldies but goodies. If you have handouts, please bring 75 copies. Time limit is 5 minutes per person.
10:00 Invited Speaker
Luisa Rebull, Spitzer Science Center, Caltech
Dr. Luisa Rebull of the Spitzer Science Center, Caltech will discuss some of the early results from the Spitzer Space Telescope (formerly known as SIRTF), NASA’s fourth and final great observatory. Spitzer observes in infrared light, so the Universe it sees looks very different than what we (or Hubble) sees in visible light. Spitzer studies very old and distant galaxies, very young nearby stars, and very dusty things all over the Universe (from nearby comets to distant dusty galaxies).
11:00 Invited Presenters
Physics Demonstrations from the Expoloratorium
Both Paul and Don are well-known for their creative and clever physics demonstrations as well as their zeal to share them with fellow physics teachers at both AAPT meetings and at the Teacher Institute at the Exploratorium. Today they will give us a treat with some of their latest tricks.
12:00 – 1:30 LUNCH
A delicious Chinese buffet will be set out for the meeting attendees. Several vegetarian items will be included. The cost will be $10 including drink. To reserve a lunch for yourself, and to help us plan how much food to order, please email Lettie Weinmann (firstname.lastname@example.org) that you intend to purchase a lunch (also how many in case you represent several people). Then follow up by sending a check payable to “AAPT” to Lettie Weinmann, Gunn High School, 780 Arastradero Rd., Palo Alto, CA 94306. Deadline: November 3. We will take additional lunch reservations during registration, but it would be very helpful to RSVP early.
The planning committee is arranging some exhibits and demonstrations that will be available during lunch. Also, this is a good time to visit the vendors to see what they have to offer and to ask questions.
1:30 Business Meeting/Raffle
2:00 Modeling the Vacuum Cannon
Eric Ayars, CSU Chico, email@example.com
The velocity of a projectile shot from a vacuum cannon is commonly assumed to have an upper limit equal to the speed of sound. A relatively simple theoretical model shows an upper limit that is considerably less than the speed of sound. This theoretical maximum velocity is independent of any parameters of the vacuum cannon, such as diameter and projectile mass. I will discuss the theory, assumptions made in deriving the closed-form solution and problems with the theory which invite further refinement.
2:20 What Does a Neutron Star Really Look Like?
Douglas Leadenham, DeVry University, firstname.lastname@example.org
Black holes are by definition invisible, so the next best, visible, general relativity object is a neutron star. First theorized by Tom Gold to explain pulsars, neutron stars and their close relatives, black holes, are hypothetically drawn, interacting with spiraling disks of matter captured from neighboring stars, in magazines and textbooks. None had been captured in a telescope image until 2002, when the unusual object had no other explanation. We will take a look at images on these sites and revise a key size estimate based on general relativity.
2:40 Effective Mass of an Unloaded-Hanging Slinky
Phil Gash, CSU Chico, email@example.com
Have you ever tried cacluating the period of an unloaded Slinky? I found both the conventional effective masses for a Slinky (i.e. 1/2 and 1/3) do not work. A discrete model of a Slinky (N coils each connected to each other via a spring) was developed and an expression for the effective mass was obtained. My results show it depends upon the number of coils in the Slinky and is in good agreement with the experimental data.
3:00 When You Have to Think Inside the Box
Tim Erickson, Senior Scientist, Epistemological Engineering, firstname.lastname@example.org
We came up with a cool (yet obvious) way to show why the normal force is what it is, and, as often happens when you get an obvious, cool idea, it didn’t work – and in a very interesting way. I will show how data analysis comes to the rescue, and leads us to conceptual understandings we never anticipated.
3:20 Classical Equations of Motion from Quantum Mechical Operators
Richard B. Kidd, Diablo Valley College, email@example.com
It is universally recognized that application of a quantum-mechanical operator to psi-squared, followed by integration, leads to the expectation value of the variable associated with that operator. Less well known is the fact that direct application of a kinetic energy operator to psi leads to a dynamic equation for the KE. However, since the dynamic equations are semiclassical in form, they raise questions of interpretation.
3:40 The Physics of the Springy Pendulum
Phil Gash, CSU Chic, firstname.lastname@example.org
At the last regional AAPT meeting Ann Hanks demonstrated a spring-mass system which behaved like both a pendulum and a spring, regardless of the starting initial conditions. This springy pendulum system is modeled as a mass connected to a massless spring which is allowed to swing from its support point. The system Lagrangian is used to obtain the equations of motion which result in two coupled non-linear second order differential equations. One contains a radial and angular velocity coupling term which can be used to explain the back-and-forth pendulum-like to spring-like behavior. The coupled equations are solved numerically and match the observed behavior.
REGISTRATION FREE* What a deal! *fee is waived for first-time attendees and students! The rest of us pay only $10. A bargain at twice the price!
Section dues are $10 per year, due each Fall. If you cannot attend the meeting, remain an active member which will ensure you’ll receive all our mailings by sending dues to our treasurer Dennis Buckley, Liberty High School, 850 Second St., Brentwood, CA 94513.
o Fall Meeting, SCAAPT, Pomona College, October 26, 2004
o Winter Meeting, National AAPT, Albuquerque, NM, January 8-12, 2005
o Spring Meeting, Joint Meeting NCNAAPT/SCAAPT, CSU Fresno, April, 2004
There are many hotels and motels within a short distance of Gunn High School. A short trip up or down El Camino Real will yield many possible places to stay. A few are listed here for reference. The hotels are listed by price and all are within 2 miles of the school.
One adult: $45.99 + tax
Two adults $51.99 + tax
4301 El Camino Real
Palo Alto, CA 94306
www.motel6.com (10% discount if making online reservation)
N/S King $67 + tax
Identify yourself as going to the meeting at Gunn High School
3901 El Camino Real
Palo Alto, CA 94306
$99 per room Fri only
Identify yourself as a “Physics Teacher’s Conference” to get this rate
They are holding a block of rooms for us.
4290 El Camino Real
Palo Alto, CA 94306
$99 per room Fri-Sat (+ tax)
$129 per room Mon-Thurs (+ tax)
Identify yourself as a “Physics Teacher” to get this rate
3400 El Camino Real
Palo Alto, CA 94306
(650) 493-7982 or (650) 493-2411
$119 per room, $99 with AAA (+ tax)
4261 El Camino Real
Palo Alto, CA 94306
Map to School
Click on map for Mapquest version
From the South beyond San Jose (101)Take 85 north. Exit 85 onto 280 north. Exit at El Monte east. Left onto Foothill Expressway. Right onto Arastradero Road. Turn left into school at the traffic light.
From the South above San Jose (101)
Take San Antonio Road exit. Turn left (west). Right onto El Camino Real. Left onto Arastradero Road. Turn right into school.
From the North (280)
Take Page Mill Road exit east (left). Turn right onto Foothill Expressway. Left at Arastradero Road. Go through one light then turn left into school at the traffic light.
From the North (101)
Take Oregon Expressway exit. Left at El Camino Real. Right at Arastradero Road. Turn right into school. Campus Map
Click on map for larger image
Map to SLAC
From Freeway 280
Take Sand Hill Road East. Turn right into the entrance to the Stanford Linear Accelerator Center (SLAC). Stop at the information booth and be directed to parking.
From Freeway 101
Get to 280 using either Woodside Road (coming from the north) or Page Mill Road (coming from the south). If originally going south, take 280 south when you get to the freeway. If originally going north, take 280 north when you get to the freeway. Then follow the directions above. Updated 10/27/04
Newark Memorial High School Physics & Robotics Teacher
How to do spectrum analysis?
–if you have probeware, get microphones for it
–for Windows machines, Spectrogram works well:
Demo Version; Free; limits time of usage
Paid version: $25
–Macintosh: Audacity 1.0 (free) and Mac the Scope (free to try; $74 to buy) are both on www.zdnet.com
Media on throat singing:
Scientific American article: http://www.sciam.com search for “Tuva”; 09/20/1999
article is available free&endash;if you are asked to subscribe or pay to get it, keep poking around. This is a great intro into Tuva, throat singing, and some of the physics behind it. Great audio and video clips!
Tuva or Bust! Richard Feyman’s Last Journey (book)— Ralph Leighton, W. W. Norton & Company 1991
Chronicles Ralph and Richard’s many-year struggle to get to Tuva.
Genghis Blues (movie) http://www.genghisblues.com/ Tells the story of San Francisco blues musician and throat singer Paul Pena’s incredible journey to a throat singing contest in Tuva.
Michael Emory’s throat singing how-to (included with presentation):
by Michael Emory
During the past year I have learned techniques of some throat-singing styles as practiced in Central Asia. With guidance from Maj. P.C. (Ret.), and access to his collection of vocal recordings from that part of the world, I have experienced fair success in executing the forms described below. The following is intended to offer instruction to anyone with interest and patience enough to learn a way to refine self-generated sound. Previous voice training is not required. I would be delighted to hear of someone able to throat-sing while having listened to no recordings.
Much of learning to throat-sing is dependent upon the recognition of an existing subtlety of one tone among many. When you hear this and find where it is and is not, you may listen as it gains clarity and power. In this manner I was able to produce two harmonics with melody soon after hearing the khoomei-borbangy of Mr. Kaigal-ool Khovalyg. I already had been ending medleys of style with the required position simply because it felt correct.
Variation in the character of throat singing styles is dictated by careful positioning and movement of the tongue, lips, and jaw. These control pitch, timbre, and (in one case) suppression of harmonic overtones. Also necessary is a tightening of throat muscles to restrict the fundamental (lower, normal) tone. This allows generated overtones to dominate that which is heard. A faint harmonic melody can be produced above a relaxed and normally sung tone. With recognition of this possibility comes a realization that many singing styles consciously utilize harmonics for dramatic effect.
The style of kargyraa differs in that another vibration is required of the throat.
Khoomei, basic – begin by producing a long, steady note with an open, relaxed mouth and throat. by altering lip and tongue positions to say vowels, “oooo… ohhh…. ayyy…. ahhh….. eeee….”, you will hear different overtones in ascending pitch. Cupping a hand to your ear may help you to identify these initially. Maintain one tone as you tighten your throat and stomach muscles slightly. If you choke, try a lower fundamental. If you begin coughing, go into this tightening over a period of time to avoid damage to your voice. Hard coughing is punishing to vocal cords.
You should now be making “electronic” sounding vowels. If any of these are extended with subtle changes to the tongue, lips, or jaw (changing one element at a time as in any controlled experiment), separate overtones will gain definition. The sounds you create are feedback leading to finer mouth control.
It may be difficult to sort out the overtones created by each position. Discover them as you work out a scale above one steady fundamental. Eventually simple melodies will emerge within a limited range. As you consciously create melody, avoid the temptation to alter the fundamental. This is basic khoomei.
Sygyt – with your throat tightened, sing an “e” vowel at a comfortable pitch. Shift the jaw slightly forward and partially close the mouth with lips protruded. You should hear a drop in the pitch of the harmonic. As the sides of the tongue are held against upper premolars push sound between tongue and palate. By adjusting your lips different notes will emerge. Flexing the middle of the tongue up and down lends a wider range, greater definition and more drive to produced tones. Keep the tongue sides in contact with teeth to maintain a separate upper cavity in which overtones are generated. This is the position for sygyt used by Tuvan singers.
A similar style places the tongue higher on the palate or with the tongue-tip folded back. I believe that Mongolian singers favor this position.
Khoomei-borbangy – if you are able to produce a very relaxed and clear khoomei melody by varying tongue position but without jaw or lip shifts, you may begin hearing a second overtone. This is audible at a pitch between the fundamental and the melodic overtone. A third, higher, ringing overtone may also emerge (most people find it a painful curiosity only, some people think that of all throat-singing). Tongue movement to create melody must remain low in the mouth to avoid interference with the lower, more subtle harmonic. It is simplest to keep the tip rested at the base of the lower incisors while gently flexing the middle of the tongue. With practice comes greater freedom of movement. The jaw should be held forward and fairly rigid as the lips are held loosely at an “ohh” position. On the verge of relaxation your lips should quiver lightly and rapidly. A slight opening or closing movement of the jaw may help initiate this movement. This fine balance is an elusive state and should be allowed to happen passively on your part. If it once happens, simply try to recreate the conditions which led to its occurrence. Warm up by singing in the other styles, your lips may respond more readily.
Fine control will take time to develop. The result is a pulsating overtone adding richness to a remote sounding, fluting melody.
Kargyraa – this style relies upon vibrations other than those normally produced by the vocal cords. A low fundamental is used to create a powerful percussive sounds. Harmonics are created in an open mouth as in basic khoomei. Use jaw and lip changes freely. It is easy to combine this with sygyt to create chylandyk.
While able to perform kargyraa, I cannot explain the mechanism used in its production. A tightening of part of the throat is involved as is a push from the diaphragm. [Forcing more air through a restricted passageway would accelerate it and may act to overload the vocal cords, changing their vibration frequency?] As my singing practice continues I realize that an ability to relax the lower portions of the throat allows surfaces deeper in the chest to resonate and enhance tonal quality. Sygyt singing is a very good warm up for kargyraa.
Kargyraa may be learned by “huffing” air forcefully at the lowest pitch you can create, or at some level below that recognizable note. In time you should feel a regular percussive movement. When you find that you can engage that “motor”, rise the pitch until clear overtones emerge. The amount of expelled air needed to sing passages of length may seem daunting at first. With practice you will expend less breath in generating desired sounds and can sing for longer periods. Achieving the correct throat movement is the more difficult aspect of kargyraa. As I shift from a normally sung vowel into this movement, I tighten my throat and stomach slightly, As I go from khoomei to kargyraa, I open the upper throat.
Dairy products should be avoided before singing as they create mucous in the throat. Milk chocolate seems to be especially effective at this.
As mentioned above, the new sensations your throat will experience was you initially try throat-singing will likely bring on coughing; it tickles. Until your throat becomes accustomed to this you should not push too rapidly. Do only a little each day. Throat-singing is good for your voice, sustained coughing is not.
“New Teacher Workshop”Paul Robinson, Lonnie Grimes, Dan Burns and Dean Bairdpresented this workshop to an appreciative group of about 20 new and veteran teachers.
“Amusement Park Physics”
Clarence Bakken presented this PTRA workshop to a group of approximately 12 teachers.
5:00 – 7:30 The Exploratorium was open for physics teachers and their families to enjoy from about 5:15 until the talks started at 7:30.
|NCNAAPT thanks PASCO Scientific for sponsoring the refreshments that we had at the Friday social. Their continuing support is appreciated by the entire section.|
7:30 – 8:15 Paul Doherty, Show and Tell
Paul presented several demonstrations, many using magnetic phenomena. The section recognized Paul for his ongoing support of science teachers through Exploratorium Teacher Institutes. http://www.exo.net/~pauld/
8:15 – 9:00 The Physics Chanteuse
Lynda Williams, physics instructor at Santa Rosa Community College, presented a number of songs she has developed to teach and/or honor famous scientists. http://www.scientainment.com/pchant.html
|Paul Doherty demonstrates dominoes that grow exponentially in size.||Lynda Williams bursts into song at the Exploratorium.|
Morning Session, Science Building 101, San Francisco State University
9:00 Show & Tell – Contact the presenters for additional information
|Dave Wall, CCSF, ret.
A very large capacitorAndi Erzberger, LBNL
QuarkNet and Cosmology projectsCheuk Chau, Chico State
Modification of a heat absorber experimentDon Rathjen, Exploratorium
Plans for a vibrating “bug” with uses in a classroom
Clarence Bakken, Gunn H.S., ret.
David Kagan, Chico State
Dan Burns, Los Gatos H.S.
James Dann, St. Ignatius College Prep
Sue Lee, Chico State
Lewis Epstein, Insight Press
Ann Hanks, American River College
Chuck Hunt, American River College
Kris Wedding, CSUH
Dean Baird, Rio Americano H.S.
Mike Ugawa, St. Ignatius College Prep
10:00 Invited Talk “Detecting Earths”
Debra Fischer, UC Berkeley, email@example.com
We learned about the nature and number of planets that have been discovered in recent years. This was an awesome presentation and appreciated by all who attended.
11:00 Invited Talk “The Forgotten Fundamental”
Al Bartlett, Professor Emeritus, University of Colorado at Boulder, Albert.Bartlett@colorado.edu
Dr. Bartlett stimulated us as he applied the basic mathematics of exponential growth to daily life situations such as resource use and population growth. The predictions lead to consequences that are very critical for everyone. Some of Dr. Bartlett’s ideas have been captured on fizziker.com.
|Debra Fischer, pursuer of “Earth’s” beyond our solar system, enthralls the audience.||Dr. Bartlett gives NCNAAPT the straight scoop on exponential growth.|
1:30 Raffle/Business Meeting
Elections were held for three offices that have been vacant since last spring. (Elections weren’t held at Cal Poly due to lack of quorum.) The new officer slate is listed online.
Click here for original program descriptions
|1:45 Exploring the Invisible Universe
Lynn Cominsky, Tim Graves and Sarah Silva, Sonoma State UniversityTo see the Education and Public Outreach Programs at Sonoma State University, go to http://epo.sonoma.eduTo request NASA materials from any of our projects, please send mail to: firstname.lastname@example.org
|1:45 Teaching Biomolecular Electronics and Biophotonics at college level: Is it possible?
Enrique W. Izaguirre, Sonoma State University
|2:00 “Humidity and the COR of Baseballs”
David Kagan and Dave Atkinson, California State University, Chico
|2:00 “The Case for Increased Emphasis on Life-Science Applications for Students in Algebra/Trig-Based Physics Courses”
Peter Urone, California State University, Sacramento
|2:20 “Model Rockets and Student Trajectory Simulation”
Patti McLain, Jesuit High School
|2:20 “LabVIEW in Beginning Labs”
Bob Good, Cal-State Hayward
|2:40 “Experimental Designs in the Introductory Physics Laboratory”
Xueli Zou, California State University, Chico
|2:40 “Understanding Partially Coherent Light”
Zhigang Chen, San Francisco State University
|3:00 ” Analyzing Galileo’s-Ramp Data”
Tim Erickson, EEPS Media
|3:00 “Detecting Infrared Light, Herschel’s Experiment in the Classroom”
Dan Burns, Los Gatos High School
|3:20 “Application of Video and Online Exercises to the Instruction of Kinematics and the Operation of the Air Table”
Gary Latshaw, Foothill Community College
|3:20 “Photoelectric Experiment with Light-Emitting Diodes”
James M. Lockhart, San Francisco State University
|3:40 “Research Project as a Final Assessment”
Algis Sodonis, The Urban School of San Francisco
|3:40 “Experimental Conic Sections”
Lew Epstein, City College of San Francisco, and Wally Downs
|4:00 “CPS Course Response System in Introductory Physics Courses”
Susan Lea, San Francisco State University
|4:00 “Simple Physics Uses of the Macintosh Graphing Calculator”
Arnold F. McKinley, The Marin Science and Math Support Center
|4:20 “Tuvan Throat Singing and You”
Damon Jansen, Newark Memorial High SchoolNotes from this talk.
|4:20 “Is Pressure Really Lower in a Moving Fluid?”
Evan Jones, retired, Sierra College
|4:40 “Lowell saw the canals on Mars, why can’t NASA?”
Phil Gash, CA State University, Chico
|4:40 “High Voltage Junk”
Dave Wall, City College of San Francisco, and Mike Kan
|5:00 “Integrating Modern Topics and Dark Energy”
James Dann, St. Ignatius
|5:00 “Taking Data Collection to the Next Level”
Clarence Bakken, retired, Gunn High School
Local Host:Bruce Denardo
We plan to have the name of every current and recent past member of the Northern California/Nevada section of AAPT on the list. If you plan to attend the meeting and are not or have not recently been a member of our section, please email your name and the name of your institution to Bruce Denardo (email@example.com) by 8:00 am on Thursday, Sept. 25. After that time we can’t guarantee your name will be forwarded to the security post.
Consult the map for parking areas. This is not a problem during the weekends or mid-to-late Friday afternoons. (This is the good news.)
Due to the continually changing state of conflict, NPS may be at a higher threat condition at the time of the meeting. In this case, we plan to hold the meeting at the Monterey Conference Center in downtown Monterey. The demonstration workshop and laboratory tours will have to be canceled. All other activities will occur as scheduled. Please check this web site for the latest information.
“New Teacher Workshop” (10 am – 3 pm) Spanagel 101A
by: Paul Robinson, Lonnie Grimes, Dean Baird
This popular workshop is a day-long version being offered on Friday (instead of Saturday afternoon) so that participants don’t have to miss out on the contributed papers. It is intended for teachers who are either new to teaching physics and/or those who have been at it for a while but still feel like they’re new! All new teachers will be networked with experienced teachers. The workshop includes valuable teaching tips, goodie bags, raffles where everyone wins, question and answer panels, popcorn, and more! Interested participants should email Paul Robinson at firstname.lastname@example.org to register or for more information. If you wish to attend a NTW but can’t make it Friday, email Paul Robinson anyway&endash;&endash;if there are insufficient signups for Friday an abbreviated 2-hour version on Saturday afternoon may be offered instead. No fee.
“Dramatic Physics Lecture Demonstrations” (2:30 – 4:30 pm) Spanagel 117 and 135
by: Bruce Denardo, Scott Davis, Daphne Kapolka,
Gamani Karunasiri, Kevin Smith, and Don Walters
Dramatic and unusual demonstrations will be performed, explained, and discussed. A handout is planned to be distributed. The demonstrations will tentatively include the following. Mechanics: circular/harmonic motion, Coriolis force, Foucault model, giant spool-and-rope, parametric instability, parallel axis theorem. Fluid mechanics: giant vortex bottle, toroidal bubbles, giant hydrostatic balance. Acoustics: acoustic levitation, multipole radiation source, jetting from resonator, shock tube, slappers and clappers, acoustic radiometer, spinning cup, baffled loudspeaker, phase locking. Thermodynamics: liquid nitrogen-water canon. Electricity and magnetism: electromagnetic can crusher, electrostatic screening, terminal velocity due to magnetic damping, giant Tesla coil, electromagnetically coupled oscillators. Optics: infrared camera, balloon microphone, acousto-optic transduction and lightwave transmission, night vision scope. Modern physics:model of fermion antisymmetry for 360o rotation.
Please sign up for the workshop by emailing Bruce Denardo at email@example.com. There is no fee.
“Acoustophoresis and Time-Reversal Acoustics”
Ed Tucholski, Naval Postgraduate School
The Advanced Acoustics Research Laboratory is home to these two research areas. One is on acoustophoresis which is the separation of objects using high intensity sound. Experiments in progress are studying the effect of loud sounds on gas bubbles in water and aerogels in both air and water. An oil-water separation column using bubbles, which are segregated in size using sound, is under construction. The second research area, time&endash;reversal acoustics, takes place in a long water tank, where the technique is used for communications and active submarine detection.
Libations, munchies, and other delicious treats!
7:10 PM “Quantum Mechanics of Nanotechnology”
James Luscombe, Naval Postgraduate School
Following the historic trend in miniaturizing electronic components, minimum device sizes will reach 100 nanometers in the near future. This size is significant for two reasons. First, as will be explained, in the sub-100 nanometer regime the physical principles upon which conventional electron devices are based will no longer be suitable for device operation. At the same time, quantum effects will come to predominate as device sizes become comparable with electron wavelengths in semiconductors. I will describe progress in developing nanometer-scale quantum-effect electron devices and explain how they can be understood using standard undergraduate quantum physics.
8:45 Welcome and Announcements
9:00 Show & Tell
Share your favorite demonstration or teaching tip. Since new teachers and section members will be at this meeting, you are encouraged to dust off some of your oldies but goodies. If you have handouts, please bring 100 copies. Time limit is 5 minutes per person.
10:00 Invited Talk
Andrés Larraza, Department of Physics, Naval Postgraduate School
Until recently, focusing of acoustic pulses through media with complex propagation properties had been a very difficult problem. As analog-to-digital converters have become faster, a novel technique called time-reversal acoustics has been able to overcome this difficulty. In a common realization, the time-reversal acoustic technique consists of transmitting an acoustic signal from a point-like source, digitizing the analog signal received by a microphone or a hydrophone, time reversing the signal, and retransmitting it from a nearby source. Applications of time-reversal acoustics are numerous and include medical applications (imaging and lithotripsy), nondestructive testing, underwater acoustic communications and sonar, and counter-mine warfare.
11:00 Invited Talk
“Free Electron Lasers of Today”
W. B. Colson, Naval Postgraduate School
Imagine a laser that is continuously tunable over a wide range of frequencies and that can be designed to operate where conventional lasers do not exist. This new kind of laser has already operated at microwave, far infrared, visible, ultraviolet, and even down to X-ray wavelengths. In addition, it can run reliably and efficiently for hours, days, or even weeks with only minor maintenance, producing CW laser light or short sub-picosecond pulses. This is the FREE ELECTRON LASER which contains only the essential ingredients for light amplification by stimulated emission: an external field, the laser light, and free electrons. FELs use a beam of relativistic electrons passing through a periodic, transverse magnetic field to amplify the co-propagating laser light.
12:00-1:00 pm Lunch (on-your-own)
1:00-2:00 Lab Tours
Rail guns lab tour (Adamy and Snyder, Spanagel 011)Acoustic detection of buried mines (Muir, Spanagel 025)
Thermoacoustic heat engines (Hofler, Spanagel 036)
2:00 Raffle/Business Meeting
2:20 “Fusion Technology at Low Temperatures”, Charles Jordan, Foothill College, firstname.lastname@example.org
There are now refereed papers from SRI and LANL confirming nuclear reactions at low temperatures and I have new results in cavitation driven nuclear fusion processes producing helium in large quantities and 75 watts of extra energy in a light bulb size reactor. I will review the present state of affairs in the investment community and the present understanding of the mechanism.
2:40 “Teaching Physics with Micro Electro Mechanical Systems (MEMS)”, Cindy Krysac, Department of Physics, University of the Pacific, email@example.com
A small but developing collection of classroom examples and problems using MEMS will be presented as illustrations of the application of thermal, electrical, mechanical, optical and acoustical physics to an advanced, modern technology. Use of these classroom examples engages students in learning about the emerging technology, emphasizing the importance of a fundamental physics education to the development of such technology.
3:00 “Where Does the Plutonium Come From?”
Paul Peter Urone, California State University, firstname.lastname@example.org
238Pu is used as an energy source in deep space probes. While the technique for the manufacture of 239Pu is commonly known, that for 238Pu is not. There are a number of interesting classroom and homework problems as well as student projects related to 238Pu. Among these are the production techniques themselves, the characteristics and uses of 238Pu, and its biological hazards. I will discuss a few of these in some detail and make suggestions for others.
3:20 “The String Machine”, Cheuk K. Chau California State University, Chico, CKCHAU@csuchico.edu
During the Spring 2001 NCNAAPT meeting at Berkeley, Don Rathjen of Exploratorium Teacher Institute demonstrated his amazing string machine. With a motor at each end of a string he generated a one-loop standing like pattern. By pinching the string at certain locations, a two-loop, three-loop and four-loop pattern appeared. Did the string change from one resonance frequency to another instantaneously? In this talk we will demonstrate and present an analysis on the string machine.
3:40 “Putting: The Prequel”, Scott K. Perry, American River College, email@example.com
Before golfers can even begin to worry about the Holmesian capture cross-section of the cup in the middle of a putting green, they must first get the ball to the hole. “Reading the break” on a sloping green can be very tricky making the selection of the proper velocity vector difficult. A computer putting simulation will be discussed along with the results of experiments conducted on local practice greens. A discussion of the apparent paradoxical nature of rolling friction will also be presented.
This talk will review the subtle physics of the Newtonian Demonstrator (five colliding balls suspended from strings) and illustrate the key issues by introducing the MagnaSwing which is a Newtonian Demonstrator made with repeling magnets instead of steel balls.
4:20 “QuarkNet”, Fred Oswald (retired) Napa, NSOH@aol.com
Next summer QuarkNet will be offering a three-week shortened course for twelve new teachers at each site.Generous stipends and $250 equipment funds for the next two years are provided for selected participants. AAPT members are excellent candidates for the program. This “paper” is designed to make physics teachers aware of the program, hopefully recruit new participants for next summer’s classes, and provide an opportunity for last summer’s participating teachers to describe the affect the training has had on their classes.
4:40 “The Anatomy of a Homer”, Paul Robinson, San Mateo High School, laserpablo@aol
Many high schools do a “Bull’s Eye” lab activity in which students predict the horizontal range of a projectile launched from a ramp. I have developed a follow-up activity in which home runs are analyzed as a bull’s eye with a mirror image. Since our study of projectiles is about the same time as the playoffs and World Series, it is easy to capitalize on student interest in baseball. It is an excellent way to discuss trajectories, estimated distances of home runs, air friction, components, maximum heights, etc. in a fun and engaging manner. An analysis of Barry Bonds 73rd homer will be presented as an example.
Regarding the Fall 2001 meeting of NCNAAPT at the Naval Postgraduate School in Monterey, CA, which is on Friday and Saturday, October 26-27:The following is a message from “A Place to Stay,” which is a free room finder service that may help you locate a room in the Monterey area.
Due to the popularity of the Monterey Peninsula as a vacation, conference, and wedding destination, it is highly advised that you consider now making your plans to attend the upcoming meeting of the NCNAAPT at the Naval Postgraduate School (NPS). As a general rule, there is a two night minimum stay when a weekend night is involved. We suggest you call and reserve a room early in order to guarantee a place to stay. Most places have a 3-day cancellation policy prior to the arrival date. Keep in mind the variance in rates depend on number of beds in a room, number of people in the room, and whether or not it is a weekday or weekend night. Again, we strongly suggest you book your room early. You may also call A Place To Stay at (800) 364-1867. Our web site is www.carmel-aplacetostay.com.
The following is a list of some names, phone numbers, and a range of rates for motels that are near NPS. More motels are listed on our web site. Some motels have conference rates, particularly those within walking distance of NPS (marked with an asterisk).
|*Monterey Fireside Lodge, $89.00 to $129.00
1131 10th St., Monterey, CA
(800) 722-2624*Stage Coach Lodge, $79.00 to $109.00
1111 10th St., Monterey, CA
www.bestvalue.com (click on Monterey, CA, and then Stage Coach Lodge)
*Monterey Bay Lodge, $49.00 to $109.00
55 Camino Aguajito Rd., Monterey, CA
*Monterey Hilton, $159.00 to $189.00
1000 Aguajito Rd., Monterey, CA
(800) 734-5697*Hyatt Regency Monterey, $175.00 & up
Center 1 Golf Course Dr., Monterey, CA
(800) 233-1234Casa Munras Garden Hotel, $129.00 to $184.00
700 Munras Ave., Monterey, CA
San Carlos Inn, $69.00 to $79.00
850 Abrego St., Monterey, CA
Merritt House Inn, $137.50 to $148.50
386 Pacific St., Monterey, CA
*Within walking distance of the Naval Postgraduate School.
After passing through the gate, turn immediately left, cross a road, and then turn left into a parking lot. This is very near the Mechanical Engineering Auditorium, where the Saturday morning activities will be held. All activities are within walking distance from this lot. The Friday evening activities will be held in the La Novia room of Herrmann Hall (the historic Del Monte Hotel). The Saturday afternoon activities will be held on the first and basement floors of Spanagel Hall. There are parking lots that are nearer to each of these buildings.
Parking during mid-afternoon on Friday will be not be difficult.