One of the things that is sometimes very frustrating (to me, at least) about popular physics books is that they rush very quickly through the physics that we already know, in order to spend time talking about wildly speculative ideas. This not only gives some of these books a very short shelf life, as their… Continue reading The Infinity Puzzle by Frank Close
Category: Physics
The Advent Calendar of Physics: Introducing Angular Momentum
Moving along through our countdown to Newton’s birthday, we come to the next important physical quantity, angular momentum. For some obscure reason, this gets the symbol L, and the angular momentum for a single particle about some point A is given by: This is probably the most deceptive equation we’ll see this season. Yesterday’s definition… Continue reading The Advent Calendar of Physics: Introducing Angular Momentum
The Advent Calendar of Physics: Working for a Living
Following the basic pattern established at the start of our seasonal countdown to Newton’s birthday, today’s equation defines a piece that was left hanging in yesterday’s post: This is the technical definition of “work” in physics terms. It’s also probably the scariest-looking equation to this point, as it explicitly involves vector calculus– there’s an integral… Continue reading The Advent Calendar of Physics: Working for a Living
The Physics Book by Clifford Pickover
It’s hard to go more than a couple of days without seeing another “imminent death of publishing” article somewhere, predicting the ultimate triumph of ebooks, There’s one category of books that I expect to remain safe for the foreseeable future, though, namely books that are specifically constructed to be aesthetically pleasing. In other words, coffee-table… Continue reading The Physics Book by Clifford Pickover
The Advent Calendar of Physics: Using Energy
For the sixth day of our advent countdown to Newton’s birthday, we have the first equation that really departs from the usual notation. I’ve gotten to kind of like the way the Matter and Interactions curriculum handles this, though, so we’ll use their notation: This is what Chabay and Sherwood refer to as the Energy… Continue reading The Advent Calendar of Physics: Using Energy
The Advent Calendar of Physics: Force and Momentum
It’s that time of year again, when we count down the days to Isaac Newton’s birthday (according to the Julian calendar, anyway), and how better to mark this than with mathematics? Thus, I’ll post an equation a day until either Christmas Eve or I run out of ideas, and talk about what it means and… Continue reading The Advent Calendar of Physics: Force and Momentum
The Problem With Lectures
Yesterday’s physics education post kicked off a bit of discussion in a place I can’t link to about the usefulness of lectures. Something in that reminded me of an anecdote from my grad school days, that I think is useful, so I’ll post it here. When we were working on the spin-polarized collision experiment, we… Continue reading The Problem With Lectures
Active Learning Experiment: The Aftermath
As I said last week, I recently wrapped up a term experimenting with “active learning” techniques in the two intro courses I was teaching. The diagnostic test results were a mixed bag– one section showed really good improvement in their scores, the other was no better than the same class with traditional methods– and the… Continue reading Active Learning Experiment: The Aftermath
Not All Attrition Is Bad
One of the many things I wish I had had time to blog about during the just-completed term was the big New York Times article on attrition in science majors. This generated enough commentary at the time that people are probably sick of it, but I haven’t seen anything that exactly matches my take, so… Continue reading Not All Attrition Is Bad
Scientific Commuting: The Data
A few months back, I did a post about estimating the time required for the different routes I take to work, looking at the question of whether it’s better to take a shorter route with a small number of slow traffic lights, or a longer route with a bunch of stop signs. This was primarily… Continue reading Scientific Commuting: The Data