Repeat After Me: Particle Physics Is Not All of Physics

The very last section of the book-in-progress (at least the draft that’s with my editor right now…) is titled “Science Is Never Over,” and talks about how there are a nearly infinite number of phenomena that you can investigate scientifically. The universe is a never-ending source of amazement and wonder, with surprisingly rich dynamics in… Continue reading Repeat After Me: Particle Physics Is Not All of Physics

The Tricky Thing About Simulated Dynamics

The minimum separation as a function of the release position in the toy model of the charged tape system.

In the previous post about simulating the attraction between sticky tapes using VPython, I ended with a teaser mentioning that there was a discrepancy between the simulation and the theoretical solution from directly solving the equations. The problem is kind of subtle, but clearly visible in this graph from that post: In this, we see… Continue reading The Tricky Thing About Simulated Dynamics

Physics Hangout in Need of Better Title

What with the umpteen zillion articles declaring the Death of the Blog, I’ve been toying with the idea of doing something podcast-ish for a while. Rhett Allain from Dot Physics was game, too, and suggested using Google+ to do a video hangout, so here we are talking about our classes this term: The video quality… Continue reading Physics Hangout in Need of Better Title

Simulated Tape and Universal Behavior

Comparison of the two different simulations, scaled to the "tipping point" showing the universal behavior.

Having spent a lot of time solving equations related to sticky tape models, including trying to work solutions in my head while driving to Grandma and Grandpa’s with the kids, and making some measurements of real tapes, there was only one thing left to do: try simulating this problem in VPython. Because I’m a physics… Continue reading Simulated Tape and Universal Behavior

Burning Paradise by Robert Charles Wilson [Library of Babel]

I’ve gotten out of the habit of blogging about the books I read for fun here, mostly because I’ve gotten out of the habit of reading for fun. Not for lack of desire, but because between my job and the kids and the massive amounts of research reading for the book-in-progress, I haven’t had time.… Continue reading Burning Paradise by Robert Charles Wilson [Library of Babel]

Atomic Physics with Sticky Tape

Two pieces of sticky tape with the same sign of charge, hung from an incredibly sophisticated measuring apparatus.

In addition to making a toy model to show the tipping-point behavior of charged pieces of sticky tape, I spent some time on Tuesday trying to do something quantitative with this. Of course, Tuesday is the one day of the week that I don’t teach, and I didn’t want to go to campus to do… Continue reading Atomic Physics with Sticky Tape

You Don’t Know How Valuable Preschool Is Until You Don’t Have It

About five minutes into my class Wednesday, my cell phone rang. I silenced it right away, but recognized the number as the kids’ day care. And I knew right away what it was: The Pip has had a bit of a cough for a while, and wasn’t all that happy that morning. Sure enough, when… Continue reading You Don’t Know How Valuable Preschool Is Until You Don’t Have It

The Flying Bus

Illustration by Sanjay Patel from his version of the Ramayana. Image from here: http://kmunson-mac.blogspot.com/2012_01_01_archive.html

“Daddy, you know what? I bet you didn’t know, but my school bus can fly.” “Really? I didn’t know that.” “Yeah, there’s a button up at the front with a picture of a flying bus, and if you press the button, the bus flies.” “That’s amazing.” “Yeah, and guess what? The other day, the bus… Continue reading The Flying Bus

Charged Tape, Toy Models, and Dimensionless Parameters

The toy model of the charged-particle detection discussed in the text. Two charges start out a distance L apart, one of them is attached to a spring with spring constant k.

One of the labs we do in the introductory E&M class I’m teaching this term involves investigating charged particles with sticky tape. If you haven’t seen it before, “invisible” tape picks up an electric charge when it’s peeled off a surface quickly, and with a little care, you can create both positively and negatively charged… Continue reading Charged Tape, Toy Models, and Dimensionless Parameters