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Sep
29
comment Muon demonstration of time dilation
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Sep
20
comment What does Potential Difference between a load/resistor mean?
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Sep
19
comment Communication back in time?
A paper (one amongst many) in Phys. Rev. D. sounds pretty mainstream to me. Conjecturing various CTCs and later proving them impossible is certainly something that qualifies as research worthy.
Sep
19
comment Communication back in time?
@JohnDuffield Mainstream research. Tipler cylinders and co are mainstream, commenting "time machines are science fiction" on an answer that talks of mainstream physics is not constructive at all. Crowell's answer has nothing to do with your point. CTCs are world lines (well, in the general usage of the term), so yes, objects will have a time evolution along them.
Sep
19
comment Communication back in time?
@JohnDuffield Actually, there is a lot of mainstream research on possible closed timelike curves (jargon for time machines). I believe that Kip Thorne proved that most of these are impossible due to a buildup of vacuum fluctuations; but that doesn't make it "science fiction". It's still an area of research.
Sep
16
awarded  Notable Question
Sep
11
awarded  Popular Question
Aug
23
comment Does sound show wave particle duality?
@user36790 Please be nice
Jul
9
awarded  Enlightened
Jul
9
awarded  Nice Answer
Jul
5
awarded  Announcer
Jun
30
revised What does 'easily reversed' mean in the NIST spectral database?
added 134 characters in body
Jun
13
comment What forces carry hovering objects around the earth with its rotation?
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Jun
13
comment Taking selfies while falling, would you be able to notice a horizon before hitting a singularity?
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Jun
10
comment What would put a harddisk drive (HDD) under 350G's of force?
@NateEldredge What the manufacturers guarantee will generally be much less than what it can actually handle.
Apr
24
comment Naked Time ( Is there such a thing ?)
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Apr
18
comment Why does string theory require 9 dimensions of space and one dimension of time?
@Jiminion As in you have to arbitrarily label them; there isn't a universal "up".
Apr
2
reviewed Reopen Are the particle-wave duality and the quantum uncertainty principle united?
Apr
2
reviewed Looks OK Discovery of spin-3 particle at LHCb
Apr
2
reviewed Reviewed Significance of Reversible and Irreversible Process