Hans-Peter E. Kristiansen

less info
790 reputation
416
bio website none
location Aarhus, Denmark
age 38
visits member for 2 years, 11 months
seen 8 hours ago

Stud. Scient. Casual LaTeX user. TikZ newbie.


Jan
25
comment Is there a sound that explodes gunpowder?
"Sometimes, microwave heating is explained as a resonance of water molecules, but this is incorrect;[14] such resonances occur only at above 1 terahertz (THz)." from en.wikipedia.org/wiki/Microwave_oven
Jan
25
awarded  Enthusiast
Jan
20
accepted Death by neutrinos - polonium go home
Jan
19
comment During reflection does the emitted photon have same properties?
Depends on what you mean by similar. In both cases there is an incoming and outgoing photon and an electron(within an atom) involved. You can read about both processes on wikipedia.
Jan
19
comment During reflection does the emitted photon have same properties?
What you are describing is not reflection, but photoluminescence. What you want is called Compton scattering.
Dec
28
comment Does thermal energy change within a chamber depending on what's in it, where it is, what it is?
Nothing is wrong with cubic-feet and fahrenheit in everyday use in parts of the wold. You also write lb and ounce and 9x9 nothing. All of it seems irrelevant to what you are asking.
Dec
27
comment Does thermal energy change within a chamber depending on what's in it, where it is, what it is?
en.wikipedia.org/wiki/Heat_capacity
Dec
27
comment Does thermal energy change within a chamber depending on what's in it, where it is, what it is?
Does the weird numbers and units have any relevance for your question?
Dec
2
comment Death by neutrinos - polonium go home
Why will a sufficiently small neutron star not work?
Dec
2
comment Death by neutrinos - polonium go home
Your argument is valid. Your calculations are very wrong. You can only add cross sections like that in the zero limit (I believe you know that).
Dec
1
asked Death by neutrinos - polonium go home
Nov
30
accepted What is the logic behind the Fahrenheit scale?
Nov
30
comment What is the logic behind the Fahrenheit scale?
Thank you - now I see it. Rømer liked to divide the scale into 1/60 - like (arc-)minutes and seconds.
Nov
30
comment Milky Way Voyeurism
@Johannes: Cool this really helps -but you forget that I am willing to travel to get a better view. -see my edit.
Nov
30
comment Milky Way Voyeurism
@WetSavannaAnimal aka Rod Vance: Do you know the optimal time and place? -see my edit.
Nov
30
revised Milky Way Voyeurism
added 249 characters in body
Nov
30
comment What is the logic behind the Fahrenheit scale?
@vnb: We use the decimal system both now and then. 100=10^2
Nov
30
comment What is the logic behind the Fahrenheit scale?
@Brandon Enright: So 0 to 100 - that makes sense. Do you have a reference for this? It is not what is written on wikipedia.
Nov
30
revised What is the logic behind the Fahrenheit scale?
added 149 characters in body
Nov
30
comment What is the logic behind the Fahrenheit scale?
This is what is written on Wikipedia. It is not what I am asking. I will make an edit to make my question more clear.