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Natural Science Forum / Physics / Research / March 2005



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ThreadLast Post  Replies
MOND & Carmeli31 Mar 2005 16:43 GMT2
Moshe Carmeli claims to have shown that Schwarzschild + expansion will
lead to a MOND type acceleration.
eg
astro-ph/9907244
What is backward in "backward volume spin waves"?31 Mar 2005 16:42 GMT1
When people write about "backward volume spin waves" like at:
http://www.eltech.ru/kafedrs/fet_eips/persoh1/KOSTYLEV/4.pdf
or
http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=TEPHEX00004
7000011001350000001&idtype=cvips&gifs=yes

What does Landau mean? (From D. Gross Lecture)31 Mar 2005 16:42 GMT2
I browsed through David Gross' Nobel lecture slides (URL below) and
noticed the following quote of Landau (1960):
"We reach the conclusion that within the limits of formal
electrodynamics a point interaction is equivalent, for any intensity
a question about non - locality31 Mar 2005 16:42 GMT14
In Bjorken and Drell - QED part 1 I read a statement that one doesnt
use a square rooted  Hamiltonian (H= SQRT/m*2.c*4+m*2.p*2/) in a wave
equation of the Schoedinger type
(–ih.dpsi/dt=H.psi) because after expanding the root in Taylor series
QED Question, how far does the electron move?31 Mar 2005 07:54 GMT1
That's say I have a space with two electrons moving in different
directions.
____o>
_________________<o
Spontaneous particle-antiparticle pair production31 Mar 2005 07:54 GMT8
Given that spontaneous particle-antiparticle pair production
can occur at any given point and time is there any
possibility that more than one event like this could occur at
the same point and time.
This Week's Finds in Mathematical Physics (Week 212)31 Mar 2005 05:46 GMT2
Also available at http://math.ucr.edu/home/baez/week212.html
March 26, 2005
This Week's Finds in Mathematical Physics - Week 212
John Baez    
Fifth fundamental "force"31 Mar 2005 05:46 GMT3
So, we know the weak, strong, electromagnetic, and gravitational
interactions. But we also know (or at least, I believe) that there is a
fifth, (and possibly sixth, seventh, eigth, and so on, to be discovered in
thousands to millions of years.) Could the fifth one be what gives ...
Holography and positive cosmological constant30 Mar 2005 19:52 GMT1
According to standard lore, the quantization of a diffeomorphism-
invariant theory like general relativity can not have local degrees
of freedom. Hence the best description of quantum gravity we can
hope for is in terms of holographic data living on the boundary of
Black hole evaporation30 Mar 2005 04:52 GMT7
This may seem like a stupid question but if black holes radiate, and
smaller black holes radiate faster,  could a small black hole be used
to convert mass into energy with 100% efficiency?  What would be the
drawbacks to this (besides the obvious of course)?
Casimir effect and cosmological constant29 Mar 2005 18:16 GMT2
It is often claimed that the cosmological constant is off by 120
orders of magnitude (or 30 orders on a linear scale). The argument
is basically that vacuum has an energy due to zero-point fluctuations,
whose reality is proven by the Casimir effect. Now Jaffe claims in
Teleportation of photons using entanglement29 Mar 2005 09:25 GMT34
On howstuffworks.com... article on photon teleportation...
http://travel.howstuffworks.com/teleportation2.htm
The article only goes into a basic description of how entanglement
works, and I wasn't able to find a more detailed one anywhere else. I
what do i need to learn physics29 Mar 2005 09:21 GMT3
DEAR PHYSICS
MY NAME IS BILLY.I HAVE DOWN SYNDROME.I LIKE PHYSICS.PHYSICS TELLS ME
THINGS.I LIKE THINGS LIKE TIME.I WANT TO LEARN LOTS OF THINGS.I AM NOT
AFRAID.AM I SMART ENOUGH?
Curious about response to Fermilab's proposal of unecessariness of dark energy...29 Mar 2005 09:21 GMT4
http://www.fnal.gov/pub/presspass/press_releases/darkenergy_3-16-05.html
Work without entropy?29 Mar 2005 01:49 GMT1
Is it possible to do work without
an increase in entropy?
What is the proof?
I am not a student.
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