72 reputation
526
bio website dftuz.unizar.es/~rivero/…
location Zaragoza, Spain
age 47
visits member for 4 years, 6 months
seen 4 hours ago

12h
comment Does the outflowing water create a thrust on the bucket?
is it $mg - F$ or $mg' -F$ ? Is F the same external force, or just coincident notation?
13h
comment Does the outflowing water create a thrust on the bucket?
The formula involving both g and g' implies that if the area of the hole is cero, then F=mg??? Ah, this F is not the original F or the question. Not very clear.
13h
comment Does the outflowing water create a thrust on the bucket?
I'd say the extra term is CM preservation. If the cointainer (bucket, gas chamber) struggles to preserve the geometry of the CM position there is always a thrust that you could call in some sense fake.
14h
comment Question about the Georgi-Glashow model and the VEV of the scalar field
Q1 and Q2 are related and they are usually presented-answered in physics books by drawing a ball in the minimum Mexican Hat and no further calculation. I guess you are asking for the real calculations :-)
1d
comment Is there some no-go theorem for $D=9$ Kaluza Klein QCD+EM?
A collateral talk point is if this approach connects or not with the well worked D=10 $AdS^5 \times S^5$
Jul
30
comment How and why the phrase “quark force increases with distance”?
asymptotic freedom adds to the confusion, too.
Jul
30
awarded  Inquisitive
Jul
29
awarded  Announcer
Jul
29
revised Is there some no-go theorem for $D=9$ Kaluza Klein QCD+EM?
added 2 characters in body
Jul
29
revised Is there some no-go theorem for $D=9$ Kaluza Klein QCD+EM?
edited body - accepting lost edits
Jul
29
asked Is there some no-go theorem for $D=9$ Kaluza Klein QCD+EM?
Jul
26
answered Does string theory and preons exclude each other?
Jul
25
revised Mechanics around a rail tank wagon
added 402 characters in body
Jul
25
revised Mechanics around a rail tank wagon
added 402 characters in body
Jul
25
revised Mechanics around a rail tank wagon
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Jul
25
revised Mechanics around a rail tank wagon
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Jul
25
comment Mechanics around a rail tank wagon
A complete solution should, I believe, to substitute Torricelli by its spirit: no energy loss, so that all the potential energy is used either to move the wagon or to shoot the water at some speed v(t).
Jul
25
answered Mechanics around a rail tank wagon
Apr
23
revised Origin of lepton/quark generations?
added 89 characters in body
Apr
9
revised Origin of lepton/quark generations?
added 192 characters in body