335 reputation
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bio website web.me.com/charlesegrant/…
location Seattle, WA
age 58
visits member for 4 years, 2 months
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Mar
31
comment Physics involved in the DNA-structure discovery
@Floris the most famous reference is Watson's book The Double Helix. Looking at things from Rosalind Franklin's point of view is Rosiland Franklin: the Dark Lady of DNA. However, both of those are tendentious. My favorite is The Eighth Day of Creation, which is one of the best popular history of science books I've ever read.
Mar
30
revised Physics involved in the DNA-structure discovery
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Mar
30
revised Physics involved in the DNA-structure discovery
added 1 character in body
Mar
30
answered Physics involved in the DNA-structure discovery
Oct
4
comment Why does the speed of light $c$ have the value it does?
What's not true? I said physicists were considering the issue, not that it was settled or true. The Duff paper is in fact a criticism of several other papers on the topic for the reasons you mention. If nobody was working on those lines Duff would have had nothing to write about.
Jul
21
awarded  Enthusiast
May
5
awarded  Notable Question
Dec
11
answered How to determine what an object is composed of?
Jul
15
awarded  Commentator
Mar
15
comment Why does the speed of light $c$ have the value it does?
Actually, several theorists (Dirac among others) have suggested that the fundamental constants change with time. See for example physicsworld.com/cws/article/news/2010/sep/02/…
Mar
15
answered Why does the speed of light $c$ have the value it does?
Mar
13
comment Do Nuclear Power Plants have shutdown and cooling systems protected from a nuclear generated EMP?
While I agree that the public perception of the risks of nuclear power are exaggerated it doesn't help to dismiss the actual risks. The failures at Three Mile Island and Fukushima resulted in billions of dollars of damage to the infrastructure of those plants and in the case of Fukushima did result in significant radioactive contamination of the surrounding area. That's a far cry from 'the worst thing you can expect is failure to provide power'.
Feb
27
awarded  Yearling
Oct
27
awarded  Popular Question
Sep
2
awarded  Teacher
Sep
2
comment How do we know that C14 decay is exponential and not linear?
Because the half-life of C-14 is long compared to a human life time it takes careful, sophisticated measurements to demonstrate the exponential decay. However, it's probably worth noting that there are many other radioactive isotopes with very short half-lives. It a standard exercise in 1-year college physics labs to measure the exponential decay of radioactive isotopes of Silver. See for example carleton.edu/departments/PHAS/P128/lab/AgDecay04.pdf
Sep
2
answered How does a half-life work?
Mar
1
revised Starting a physics Ph.D. at 60?
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Mar
1
comment Starting a physics Ph.D. at 60?
thanks for the answer. I work at a university so I have online access to most of the journals. Not being current in the field, I tend to rely on the editorial and peer review process in the journals to pick stuff out, rather than going to ArXiv and browsing. Is that "so last century"?
Mar
1
comment Starting a physics Ph.D. at 60?
thanks for the answer. As you may have seen from my profile I'm a fellow Seattleite. I've certainly been thinking about the evening Master's program at the UW. They make it pretty explicit that it is not a gateway to the Ph.D. program, though they also note that a few folks have made the transition. Did you apply to the UW Ph.D. program?