Time, Einstein, and the Coolest Stuff in the Universe

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At the beginning of the twentieth century, Albert Einstein changed the way we think about time. Near the end of the twentieth century scientists learned how to cool a gas of atoms to temperatures billions of times lower than anything else in the universe. 

Now, in the 21st century, Einstein’s thinking and ultracold atoms are shaping the development of atomic clocks, the best timekeepers ever made. Such super-accurate clocks are essential to industry, commerce, and science. They are the heart of the Global Positioning System (GPS) that guides cars, airplanes, and hikers to their destinations. 

Today, the best primary atomic clocks use ultracold atoms, achieve accuracies better than a second in 300 million years, and are getting better all the time. Super-cold atoms, with temperatures that can be below a billionth of a degree above absolute zero, allow tests of some of Einstein’s strangest predictions. 
 
Join Dr. Phillips for be a lively, multimedia presentation—including experimental demonstrations and down-to-earth explanations about some of today’s most exciting science.


Dr. William D. Phillips is the leader of the Laser Cooling and Trapping Group of the National Institute for Standards and Technology’s Physical Measurement Laboratory—and also a Distinguished University Professor at the University of Maryland. Dr. Phillips’s research group studies the physics of ultracold atomic gases. In 1997, he shared the Nobel Prize in Physics “for development of methods to cool and trap atoms with laser light.”


March 5 at 7 pm at the Student Alumni Union, Ingle Auditorium, Rochester Institute of Technology

What I Learned at Educator.com Filming AP Physics C in Two Weeks

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It’s my last day on the west coast following two weeks of recording at the Educator.com studios in Los Angeles.  I’ve completed filming of the AP Physics C: Mechanics and the AP Physics C: Electricity and Magnetism courses, and roughly 18 months ago finished recording the AP Physics 1 and AP Physics 2 course sequences.  At the conclusion of this massive effort, I thought it fitting to take a few minutes and summarize what I’ve learned from the experience.

First, I’m amazed at the total amount of content involved in these projects when all was said and done.  The AP Physics 1/2 course includes more than 930 slides, and the AP Physics C total is up over 950.  Coupled with diagrams, formulas, and illustrations, these represent roughly a year’s worth of full-time effort, squeezed in to an already busy schedule with early morning work, weekends, and middle-of-the-night can’t sleep sessions.

Second, I’ve recognized how challenging the content truly is for the AP-C course.  I had some of the content prepared already from my APlusPhysics videos, yet it still took me more than 5 months to create the more-detailed Educator.com lessons.  I designed each lesson in detail, and even made notes on what I would discuss, derive, and explain on each individual slide.  When I reached the studios in LA, however, I still had tons of preparation work to do.  Each day I rehearsed every lesson three times before filming.  I’d go over the lessons in detail (including solving all problems and writing out all derivations in my notebook) over an extended dinner each night in the hotel, then go back to my hotel room and do it all again while listening to a baseball game before bed.  Early the following morning, I’d get up around 5 am and go through it once more before our 9- or 10-am filming session would begin.  Once filming for the day was complete, I’d do it all again in preparation for the next set of lessons.  I wonder if I didn’t do more physics homework in my two weeks of filming in LA than my students do in an entire year.

I found as I went through this that every time I solved a free response problem or walked through a derivation, I found slightly different methods of solving the problem.  Some were smoother than others; some were longer than others.  Even though my final passes were usually “cleaner” than my initial solutions, I tried to stick with my initial solutions in the videos to better mirror the approach students might take.

Even with all that preparation, the recording sessions were still quite stressful.  In walking through the lessons, there were technical components to the presentation that were fairly unforgiving.  Hit the wrong button in the wrong order and you’d have to start all over again.  Switch colors and then switch slides before writing and you’d have to do it all over again. Cough, sneeze, or forget where you are in a lecture or stump yourself — you got it, do it all again.  Thankfully, I’d had quite a bit of experience in this sort of thing from my previous trip out to LA to record the AP-1/2 series, so the amount of “re-do” work was kept to a minimum due to all that preparation.  But recording four hours of video lessons sure felt like a 12+ hour day.

In addition, I still found the AP-C material challenging.  In my classroom, I prepare with 42-minute lessons, and the longest I ever lecture in a row is one entire 42-minute period (and I try to avoid that like the plague).  Here, the lessons are straight lecture, with no breaks, no edits, no room for error.  That leaves a lot of material to have down cold while also dealing with technical concerns.  My detailed noted were invaluable, and I referred to them throughout my lectures to make sure I covered all the salient points in each slide, as well as having calculations pre-solved, as opposed to making viewers wait while I punched numbed into my calculator.  With my preparation, my time between lessons was approximately 10 minutes or so to get a quick drink, review the slides for the next lesson for any last-minute issues, and allow the technical folks to prepare the studio for the next round.  Others in the studio, however, would take extended time between recording lessons in order to prepare.  They had the luxury as they were fairly local to the studios, and could spread their recording work out over months.

Working through these courses from start to finish in such a detailed manner in such a compressed time span provides a unique perspective on the course.  Each lesson is designed to present a concept as simply as possible, illustrate that concept, and then demonstrate its application in a variety of scenarios.  In creating these courses I solved every released AP-C free response problem going back to 1998, as well as a scattering of earlier problems.  With the entire breadth of the course fresh in my mind, I’m confident the foundational principles emphasized in the course provide excellent preparation for students taking the AP Physics C exams.  

One of my goals in creating these courses was to provide a much more streamlined video series than their previous video series.  Their previous courses totaled 48 hours for mechanics, and 41 hours for electricity and magnetism.  My goal was to cut each of those at least in half, allowing students to minimize their time watching videos, and instead maximize their time actively working with the material.  I haven’t seen the final count for the new courses, but I’m confident we’ll be close, if not under, our target.

Uncle bob has a toupee hg clr st

I’m also excited that the College Board will be allowing students the use of formula sheets and calculators throughout the entire exam next year.  Even after studying and preparing all day every day for weeks, I still referenced my formula sheets and notes in solving problems and preparing.  Memorizing formulas does not constitute learning or understanding, and removing the requirement to have all these formulas memorized will allow students to better focus on what is important.

Finally, I knew being gone from my family for two weeks would be difficult.  I have a two-year-old and a four-year-old daughter at home, and they are already growing up way too fast.  I treasure my time with them, especially our time in the summer when Daddy-Daughter Day Care includes swimming, playing around out back in the sandbox and water table, riding bikes, playground time, and so on.  But it’s been even tougher than I expected.  I’m so thankful for modern technology which allows me to see them and talk to them each day, but when your little girls says all she wants is you to curl up in bed with her after story time at night, it tugs on your heart strings something fierce.

I’m proud of what we’ve put together here at Educator.com through these efforts, and hopeful that students across the world will find these videos helpful in their studies.  I’m also excited to know that I will be able to use these resources with my students in the coming years.  I’m relieved to have finished this project, eager to refocus my efforts on other projects such as revisions to AP Physics 1 Essentials and completing AP Physics 2 Essentials, but most importantly, I can’t wait to get home and hug my girls.

Great AP Physics C Resources #physics #physicsed

After several requests for favorite sites from AP Physics C teachers on the web, I’ve put together a list of some great online AP Physics C resources for instructors and students alike.

  • Man really happy hg whtViren’s AP Physics C Video Lectures: A well-thought-out set of YouTube videos detailing the AP-C curriculum.  I’m especially fond of the instructor’s ability to tie course details into “big-picture concepts” as the videos progress.  Make sure you check out his AP Physics Review videos, a great test prep resource!
  • MIT Physics 8.01 Mechanics Video Lectures (Walter Lewin): Tremendous set of video lectures from the world-renowned Dr. Walter Lewin.  Tremendous.
  • MIT Physics 8.02 E&M Video Lectures (Walter Lewin): Another set of great lectures by Dr. Lewin — a little light on circuits for the AP-C curriculum, but does a fabulous job with electromagnetism.
  • APlusPhysics.com: I’d be remiss if I didn’t mention my own site, APlusPhysics.com, which includes videos covering the entire AP-C Mechanics and E&M courses (E&M targeted for completion in March 2013), student guide sheets / tutorials for the entire course, course notes from individual lectures, student blogs, projects, forums, and a repository of curated links!
  • LearnAPPhysics – Physics C: Richard White continues to build up a repository of original questions at both the AP-B and AP-C levels that are a great way for students to test their understanding of key concepts and applications.  In addition, White includes links to video lessons from Walter Lewin’s MIT lectures, Monterey Institute, and The Mechanical Universe video series.
  • Peggy Bertrand’s AP Physics C Page: Dr. Bertrand has put together a nice compilation of course notes for both Mechanics and Electricity & Magnetism.  She offers her lecture slides for download in Powerpoint format, as well as an accompanying MS Word document designed for students to take corresponding notes on. 
  • Hippocampus Physics: Video resources and mini lessons from Monterey Institute for Technology and Education.
  • College Board AP Physics C: Mechanics Course Home Page
  • College Board AP Physics C: Electricity and Magnetism Course Home Page
  • UC College Prep AP Physics C: Another framework for the Monterey AP Physics C videos, but organized around a syllabus including labs, key concepts, readings, sample discussion problems, etc. 
  • Fizziks.Info: Rebecca Howell’s AP Physics site, including links to her YouTube channel and AP Physics C documents which present well-organized solutions and derivations.
  • University of Illinois PHYS 211 Practice Exams: Several sets of interactive “hour exams” for mechanics students to test your skills
  • PrettyGoodPhysics: Paul Lulai’s physics repository — tons of great materials posted by students and teachers across a wide range of topics.  Teachers, make sure you check out the Secure-PGP area as well for instructor-only materials!

You can find the curated list of AP Physics C resources online at http://www.aplusphysics.com/courses/ap-c/APC_Physics.html.  If you have others to add, please shoot me a message (e-mail address available on the top of the APlusPhysics.com page) and I’ll do my best to keep these updated!

Free AP Physics C: Mechanics Videos

It’s been a crazy couple months, but last night I finished up the flipped class videos covering the entire AP Physics C: Mechanics curriculum.  My goal was to try and target all the major points of the course requirements in roughly 6 hours worth of videos, realizing, of course, that students would need some background in physics in order to handle the material at this speed.  I have a bit of tweaking to do (there’s a minor math typo in the SHM video, for example, that I’ll redo at my earliest convenience), but I’m pretty excited that the entire set of videos clocks in right around 6:18:00.

When peopAPlusPhysicsLogole first hear this, the typical reaction I receive is “you must not have done a good job to cover all that material in such a short period of time.”  I look at it from the alternate perspective — I’m boiling down the course into the key concepts and examples that illustrate them.  These videos are not meant to be a substitute for an in-the-classroom standard course — far from it, for that purpose, they would be an abysmal failure (as, I imagine, any video-based system would fail).  Instead, these are meant as an additional resource, a tool, for students to review the take-away highlights from each subject, reinforcing major principles and applications.  Physics is something you do, not something you know, therefore the meat of any course is taking resources such as these and applying them in a variety of situations.  Practice, exploration, discovery — that’s how you learn.  But having a concise review available on demand certainly can’t hurt.

So, for those interested in such a resource, I hope you find these videos useful and enjoyable.  At the beginning of the year I’d never planned to undertake this project, but student requests in early September got me started, and ongoing feedback on the value of these has been tremendous.  Our most recent unit, in which I completely flipped the classroom (absolutely no lecture in class, students watched videos at night and each day was hands-on exploration, lab, group problem solving, and reflection) led to the highest end-of-unit exam grades I’ve seen from a class to date.  This reinforces how effective this method of instruction can be with motivated students who engage fully in the process.

In short, I hope others are also able to take some value from these videos.  For the 6 hours of completed videos, I would estimate I’ve put in close to 120 hours of work (organizing, researching, presenting, taping, re-taping, re-re-taping, editing, producing, etc.) beyond what I would have done just to teach my standard lectures, but I believe I’ve created a resource I can use again and again, year after year, tweaking and updating the videos as I find improved methods and alternate explanations.  Not sure I want to take on the E&M half of the course this year… I have a ton of other projects on my docket (some of which are quite extensive with looming deadlines), but would love your feedback if you find these of value, if you don’t, or if you’d like to see E&M completed as well.

Make it a great day!

 

Link to AP Physics C: Mechanics videos

Link to AP Physics C: Mechanics videos on Youtube

Link to AP Physics C: Mechanics guide sheets (accompany videos)

Intro to AP-C Physics

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Course Expectations

  1. Come to class prepared. This means every student should come to class with something to write on, something to write with, and a working calculator.
  2. Give me your best every day. I realize that the amount of energy may vary from day to day. Everyone has good days and bad days. Each of my students expects me to give them everything I have every day — I expect the same in return.
  3. Be respectful. I expect, and demand, that students show respect for themselves, their fellow students, and the course instructor at all times. Simple words like please and thank you go a long way toward maintaining a positive learning environment.
  4. Conduct yourself in a professional manner.

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Physics Teacher Out-Reach Web Meeting 1/14/12! #physicsed #physics #edtech

BrendanNoon The Rochester Area Physics Teacher’s Out Reach (RAPTOR) will hold its first meeting of 2012 at the Rochester Institute of Technology on Saturday, January 14th from 9 am-noon EST.  Physics education enthusiasts all over the world are welcome to attend this meeting live via this link.

The meeting will feature a presentation by Dan Fullerton, author of Regents Physics Essentials, Honors Physics Essentials, and developer of APlusPhysics.com, as well as a presentation and discussion centered around physics lessons addressing New York’s Common Core State Standards and how these changes will affect physics education.

Come for the free donuts and stay for the demos, and if you can’t attend in person, join us online!

Special thanks to Brendan Noon of Science With Mr. Noon for organizing this event.

Honors Physics Essentials Only $12.95!

Happy Holidays!

clip_image002I am thrilled to announce the release of Honors Physics Essentials, an algebra-based physics book designed to assist beginning physics students in their high school and introductory college physics courses as an invaluable supplemental resource in class as well as a review guide for standardized physics assessments such as the SAT Subject Test in Physics, PRAXIS Physics, and CST Physics exams.  You can find it online at Amazon.com for only $12.95.

Honors Physics Essentials is an easy-to-read guide to algebra-based introductory physics, featuring more than 500 worked-out problems with full solutions and covering topics such as: kinematics, dynamics, momentum, impulse, gravity, uniform circular motion, rotational kinematics, work, energy, power, electrostatics, circuits, magnetism, microelectronics, waves, sound, optics, thermal physics, fluids, and modern physics.

The 384-page 6”x9” paperback book is integrated with the APlusPhysics.com website, which includes online question and answer forums, videos, animations, and supplemental problems to help students master Honors Physics Essentials.  You can find more information at http://www.aplusphysics.com/honors.  Volume discounts and e-book versions are available, as are class and site licenses for electronic versions starting as low as $3 per student.

I have so many people to thank for their contributions to this endeavor that I hardly know where to begin.  First, I’d like to thank all the fans of the first book, Regents Physics Essentials (RPE), and fans of the APlusPhysics website.  It was your requests, feedback, and encouragement that prompted the writing of this book.  Following the release of RPE, reader response was tremendous, and your requests for a similar book extending beyond the scope of the NY Regents Curriculum that could be used in physics classrooms across the country as well as for standardized test preparation made the development of this book a personal necessity.

Second, I must thank my two outstanding editors, Jeff Guercio and Joe Kunz, who graciously took many hours out of their busy lives to help make this book (and Regents Physics Essentials) clear, concise, and readable.  I’d also like to thank my student Emily, who first proposed turning our course notes into a review book, and Andrew, who reinforced that you can do anything if you set your mind to it.  I’d also like to thank Muse, whose enthusiasm for this book has been contagious.

Last, but certainly not least, I’d like to thank all the teachers and professors who contributed to this endeavor.  In attempting to write a physics book that would serve the needs of Honors Physics students across the country (and beyond), the input of these teachers and professors has been instrumental in tailoring this book to the needs of a majority of students, while at the same time keeping the length (and cost) low enough to remain attractive to its intended audience.

I’ve enjoyed working on this project throughout the past two years, but as in any extended project, I’m breathing a sigh of relief to have reached the finish line (at least for now).  I hope you find the APlusPhysics website and family of resources a useful tool in your study / instruction of physics, and I look forward to growing our online learning community in the coming years.  Thank you, thank you, thank you, and best wishes on an amazing 2012!

AP-C Review Book Under $10

Amazon drops price on AP-C Physics Review Book, now under $10!  A great idea to help prepare for the mid-term and as a chapter-end review…

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