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bio website endesha.com/blog
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visits member for 3 years, 3 months
seen Nov 13 '13 at 15:52

Feb
1
comment Why is cold fusion considered bogus?
@Arjang if - at some time in the future - cold fusion and/or perpetual mobile machines will have been proven to be possible through repeated experiments we will all stand corrected. Until that time there's no reason to assume either is possible.
Jan
25
comment Why is cold fusion considered bogus?
Don't confuse mathematics and physics. In physics mathematics is a tool - potentially a tool in a setup to produce evidence. However, mathematics is never an end. The only thing that counts in physics is empirical observation, typically through repeating experiments. Hence, physics doesn't have to produces any mathematical constructions as a proof why something is impossible, it's up to those that claim that something is possible to produce empirical evidence. This line of business might not be convenient for some which is of no consequence for physics.
Jan
17
comment Is it possible to obtain gold through nuclear decay?
Actually, lead is atomic number 82 and gold atomic number 79.
Jan
13
comment negative vectors (eg velocity)
A vector is a combination of a force and a direction: youtube.com/watch?v=pXYlOC6u9w8 The speed in the example is not a vector unless it is known how much force is involved.
Jan
13
comment What software programs are used to draw physics diagrams, and what are their relative merits?
Also, you can export graphs from gnumeric in svg format and import them in inkscape: screencasters.heathenx.org/episode-078
Jan
12
comment “Magnetic mnemonics”
It is possible to add a link for that wikipedia quote? thx
Jan
11
awarded  Student
Jan
11
comment Ground-based anti-matter detector on the cheap?
You're right, I must have misread, the positrons bounce back when they encounter a "mirror point" so they probably never reach earth's surface. This seems to mean the positrons actually arrive back at the thunderstorm since the mirror point reverses their direction.
Jan
11
asked Ground-based anti-matter detector on the cheap?
Jan
7
awarded  Supporter
Jan
7
comment Are the results from models considered “data”?
The question is not politically loaded, models are regarded equally across disciplines. What is politically loaded is how model result are used and how much confidence is assigned to model results. The IPPC assessment report 2007 assigns more confidence to model skill than is desirable. No model - climate or other - is able to demonstrate skill when results are used out of context for political purposes.