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Aug
9
comment Why are the inner products of the eigenfunctions of an operator with a discrete eigenvalue spectrum guaranteed to exist?
I think that this question is (also) suitable for a math forum. -you might get better answers.
Jul
12
comment Are there devices which convert thermal energy to electric energy?
@Tarek: So you seek something that you already know doesn't exist!?
Jun
11
comment Why isn't the symmetric twin paradox a paradox?
Good explanation +1. But you do need general relativity, to explain what happens in the acceleration phase. That is also why you elegantly skip that part. General relativity is also needed to explain the non-symetry of the normal twin paradox(one stays in the same inertial frame, and the other goes trough an acceleration at one point).
Jun
8
revised How do we recognize hardware used in accelerator physics
edited tags
Jun
5
comment Pressure of sealed in liquid nitrogen
82 atm is not a very high lower limit.- but I will accept, that the answer is not simple.
Jun
4
comment Reference for phase diagrams of elements
@dmckee: See my comment to Alexander. I will accept your Wolfram link as answer to this question. - have posted a new one: physics.stackexchange.com/questions/29523/…
Jun
4
comment Reference for phase diagrams of elements
@Alexander: One thing that the phase diagram shows is that the ideal gas law can not be used to make the estimate. The answer is not 694 atm. physics.stackexchange.com/questions/29523/…
Jun
4
comment Pressure of sealed in liquid nitrogen
@Pygmalion: A very dangerous experiment, if you do not have a rough estimate :o)
Jun
4
asked Pressure of sealed in liquid nitrogen
Jun
4
comment Reference for phase diagrams of elements
@dmckee: Can you answer what the pressure inside a container, filled with liquid nitrogen, sealed, and then heated to room temperature will be? Maybe I should post it as separate question!?
Jun
4
comment Reference for phase diagrams of elements
@dmckee: Thanks - I will have a close look at this page.
Jun
4
comment Reference for phase diagrams of elements
@dmckee: Off cause that was the very first thing I tried - no luck.
Jun
4
asked Reference for phase diagrams of elements
Jun
4
comment Is rotational motion relative to space?
Sorry, but your answer is plain wrong. See other answers on this page. -and an axis is a mathematical object, there is no physical axis sticking out of the earth.
Jun
3
comment Rotation in an 'empty' universe
What do you mean by rotating? ...rotating with respect to what?
May
25
awarded  Scholar
May
25
revised On these pictures of accelerator equipment, what are the blue metal things?
Edited titile - this question is not LHC specific
May
25
accepted On these pictures of accelerator equipment, what are the blue metal things?
May
21
comment Intuitive reasons for superconductivity
Sorry - It really is not a simple topic. There is not manny shortcuts. Study hard for 10 years, and maybe you will understand some of it. No one in the world understand superconductivity 100%.
May
21
comment Intuitive reasons for superconductivity
en.wikipedia.org/wiki/Cooper_pair