If you have ever wondered (as I have) how a fever thermometer actually works (but have never felt good enough while you were wondering to do any investigation) then you should look at this article in "How Things Work", a feature of The Physics Teacher edited by H. Richard Crane of the Physics Department of University of Michigan.
The very first of "Hal's Picks", back in 1995, was the announcement of the first experimental observation of a Bose-Einstein condensate. This can be considered as a new phase of matter, in which atoms in a cold cluster lose their separate identities, because their deBroglie wavelengths exceed the dimension of the group in which they find themselves.
Robert Ehrlich teaches physics at George Mason University. This is the third book by him that I have read recently.
I picked up this volume because its title suggested that it would encourage hands-on science activities that are essential to good teaching and effective learning. Unfortunately, I discovered on reading it that the author combines a deep antagonism for the scientific "establishment" with credulity for numerous fringe ideas.
How can little green men from Mars not be a "Pick of the Month"? This article has received a huge amount of notice in the popular press, and you've almost certainly heard about it by now. If you click on the highlighted word "Science" above, and you have a personal or institutional subscription to Science, you can read the complete text of the paper for yourself, online.
This book is a nearly ideal choice for summer reading. It is small and short, it tells the fascinating, true story of John Harrison, who may have contributed more than any other individual to the establishment of the British Empire. Working alone, the self-taught Mr.
When I teach the quantum chemistry part of our physical chemistry sequence, I usually carve out one or two lectures to talk with my students about some of the wonderfully puzzling aspects of quantum measurements.
In the social sciences, 1995 may turn out to be (the figures aren't available yet) the year in which as many women earned Ph.D. degrees as men did. But in the physical sciences, the ratio is still about four to one.
I've always thought that optical transforms were a great model for the determination of crystal structures using X-ray diffraction, and I've used the ICE (Institute for Chemical Education) kit for this exercise many times.
The Dewar flasks that we use for storage of cryogenic fluids such as liquid nitrogen, oxygen, and helium, and which known outside the laboratory as "thermos bottles" were invented by James Dewar, who was the first person to liquefy hydrogen, and was nearly first in the nineteenth century races to liquefy all of the other gases.