Workout cycle from PlugOut, a supplier of exercise equipment that turns your sweat into electricity. The last time I was at the gym walking on the treadmill, I looked around and saw dozens of people sweating away, running, climbing stairs and pedaling bikes, all under the bright lights and cooling air conditioner breeze. And I […]
Thomas Greenslade wrote a very simple article for the Physics Teacher in March 2011 sharing a beautiful, wooded model from the L E Knott Apparatus Company which illustrates, at a glance, the principle that the area of a circle is really 1/2 x radius x circumference.
Sometimes it doesn’t matter if an urban legend is true or not if it sounds cute. This possibly made up story was reported here, and has made its way around the web multiple times. If you’re a geek, it’s worth a quick read.
Somewhere along my travels, I heard the following story that captures the essence of what drives a writer.
On May 20, 2009, Prof Patricia Burchat, the Chair of the Department of Physics at Stanford University, presented the last lecture in the 10th season of the Silicon Valley Astronomy Lectures. She gave what I have found to be the best demonstration of gravitational lensing. Of course, there are many examples of gravitational lensing in […]
The Hubble Constant, which describes the velocity-distance relationship for galaxies, is the foundation of modern cosmology. It establishes the time and distance scale of the universe and the dynamic nature of the galaxies since the beginning of time. It is all the more remarkable that the original data Edwin Hubble took was flawed.
Harrison Schmitt, the last man to walk on the moon, spoke to a full house at the Linda Hall Library on Sept 2, 2009, as part of the “To the Moon and to the Planets Beyond” lecture series. Schmitt left the moon on December 14, 1972 as part of the Apollo 17 mission. He was […]
Astrophysicists sometimes use familiar words, but in a very different way than we are used to. Take for example the term metal. To an astrophysicist, a metal is any element with an atomic mass greater than Helium’s. That’s because only hydrogen and helium were created during the big bang and all higher atomic mass nuclei […]
Last year, the convergence of two events gave me reason to articulate my recommendations on how to decide on a career path. Our niece stayed with us for more than a year and we watched her struggle trying to decide what she wanted to do with her life. Anyone who is over 50 years old […]