Hans-Peter E. Kristiansen

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727 reputation
413
bio website none
location Aarhus, Denmark
age 37
visits member for 2 years, 5 months
seen 2 hours ago

Stud. Scient. Casual LaTeX user. TikZ newbie.


Oct
15
awarded  Citizen Patrol
Oct
12
comment How faster is the effect of force exerted by gravity?
Quarks and mesons are not the force carriers. en.wikipedia.org/wiki/Standard_Model#Gauge_bosons
Oct
12
comment How faster is the effect of force exerted by gravity?
No not "due to Gravitational force of the Sun" but because of the gravitational force between the Sun and the Earth.
Oct
9
answered The Emperor's New Mind or Shadows of the mind?
Oct
1
awarded  Nice Question
Sep
27
comment Vacuum to hold an object
A vacuum pump generates vacuum - that is 0 atmospheres. The pressure around you is 1 atmosphere.
Sep
26
answered Vacuum to hold an object
Sep
26
comment How Was the Speed of Light Discovered?
I think you mean Ole Rømer. en.wikipedia.org/wiki/Ole_Rømer
Sep
2
comment When a ball is tossed straight up, does it experience momentary equilibrium at top of its path?
@Noobacode: Yes - you got the correct idea now.
Aug
1
comment Pressure of sealed in liquid nitrogen
I find it a little weird that they use psi on a .nist.gov site.
Aug
1
comment Pressure of sealed in liquid nitrogen
From where did you get the liquid density?
Jun
28
comment Are there old aged particles?
@Jack: You are absolutely right. -but my understanding was(and still is) that you DO understand the quote, but refused to believe.
Jun
28
comment Are there old aged particles?
@Izkata: That is the reason I am posting comments, and not an answer. Referring to a well renown book is perfectly valid.
Jun
28
comment Are there old aged particles?
@Peter Shor: There is no exceptions. Griffiths is writing about "elementary particles".
Jun
28
comment Are there old aged particles?
Change your view. Do not listen to me or other random internet posters. Listen to Griffiths. -his books is among the best introduction books ever written.
Jun
28
comment Are there old aged particles?
One need not argue that your view is wrong - it can be measured. You ARE wrong. The likelihood for a decay of a given particle is independent of how long you wait.
Jun
28
comment Are there old aged particles?
Griffiths is correct. Elementary particles has no age. No inner clock. They are all the same.
Jun
12
revised Is it possible to take a picture of a star?
added 84 characters in body
Jun
12
accepted Is it possible to take a picture of a star?
Jun
11
asked Is it possible to take a picture of a star?