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seen Feb 23 at 20:56

Jan
23
comment Why does this entropy change formula for heating water blow up at $T_{1}=0$?
@user44816 -- you don't need to pick an answer in two minutes!
Jan
23
answered Why does this entropy change formula for heating water blow up at $T_{1}=0$?
Jan
6
comment Physics of tidal locking: can the process be underdamped?
@Brionius: Okay, I see what you're saying, although I think there is still a small net torque because of the lag in application of the torque due to relativity -- IIRC, this effect has a name -- someone else will have to supply the term.
Jan
6
comment Physics of tidal locking: can the process be underdamped?
Thanks -- the use of the word 'faster' was at a minimum confusing. I was probably thinking of the reversal of direction of rotation when I wrote 'faster'. At any rate, I removed it.
Jan
6
revised Physics of tidal locking: can the process be underdamped?
removed 'faster'
Jan
6
comment Physics of tidal locking: can the process be underdamped?
Imagine you have a rigid oblong body in a perfectly circular orbit. And say it's nearly tidally locked so the major axis points nearly toward the primary and the rotation nearly matches the revolution. Then would you agree it experiences a restoring torque due to gravity pulling on the closer portion of the satellite that wants to keep the major axis pointed at the large body? Won't this oscillate?
Jan
6
comment Physics of tidal locking: can the process be underdamped?
@BowlOfRed: Again, you guys may be right, I'm just not confident. Imagine this extreme case and tell me what's wrong with the thought experiment:
Jan
6
revised Physics of tidal locking: can the process be underdamped?
typos
Jan
6
comment Physics of tidal locking: can the process be underdamped?
This is an interesting way to look at it, and you may be right. But in your example, the energy is lost as heat so can't get (easily) converted back into mechanical energy. In the tidal locking case, rotational energy is converted into a change in rotation of the primary and/or a change in orbital altitude to preserve angular momentum. Couldn't that go in reverse?
Jan
6
asked Physics of tidal locking: can the process be underdamped?
Aug
22
answered Can a human size object move so fast that it ceases to be observable?
May
23
awarded  Popular Question
May
18
awarded  Yearling
Feb
24
comment Is this picture correct from the point of view of physics?
@user102417: Are you being confused by the water line to the left of the dam where the lake meets the trees? This is far off in the distance and not at a higher elevation.
Feb
18
asked What is the physics associated with climbing a space elevator?
Aug
26
awarded  Scholar
Aug
26
accepted Can a liquid shrink as something is dissolved into it?
Aug
15
awarded  Custodian
Aug
15
reviewed Approve Can a liquid shrink as something is dissolved into it?
Aug
15
asked Can a liquid shrink as something is dissolved into it?