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Feb
9
comment Why do stellar boundaries exist?
Polytropes and GR are red herrings. There is an answer, in which under reasonable assumptions density and pressure should vanish at finite radius, but I don't have my notes on me at the moment. Also note that more massive stars are probably not in hydrostatic equilibrium but rather have a stationary (in the ideal case) wind, and thus formally they do extend to infinity.
Feb
9
reviewed Close Spinor on an eigenstate of $J_z$
Feb
9
comment Multiple Intersecting Universes
@WillO Your pasted-together construction is not a manifold and is thus hardly mainstream physics. And really the universe is everything there is, by definition.
Feb
9
reviewed Close What is the origin of the quantum operators for p and E?
Feb
9
reviewed Leave Open Why when we have GHZ, then we cannot send a qubit using teleportation technique?
Feb
9
reviewed Leave Open what is eigenvalue of $P^{1/n}$ operator if we know eigenvalue equation of $P$ ?
Feb
9
reviewed Leave Open Is QM something that belongs to all relative small particles or only to subatomic particles?
Feb
9
reviewed Leave Open shape formed by a stiff string with ends pinched together
Feb
9
reviewed Leave Open Why do bulbs dim when we switch on TV?
Feb
9
reviewed Close How to explain to a child why can acceleration be positive or negative?
Feb
9
reviewed Close Element 137 - Theoretical limit
Feb
9
reviewed Close Help finding peak electron concentration?
Feb
9
reviewed Close Temperature and magnetic properties of graphite arc
Feb
9
reviewed Close Water volume vs. pressure
Feb
9
comment dry adiabatic lapse rate
While the same calculations appear in astronomy, the notation and context is different enough I might not know what I'm talking about. Still, feel like your first proposed equality is missing the rest of the chain rule: $dT/dz = (\partial T/\partial p)\vert_\rho (dp/dz) + (\partial T/\partial\rho)\vert_p (d\rho/dz)$. I suppose this all comes down to what $\Delta$ means, and whether you take $p$ to be a reparameterization of altitude (in which case what you wrote makes more sense) or one of necessarily two abstract thermodynamic abscissas to vary.
Feb
8
comment What is a Geodetic?
Can you include a reference to the use of this term? In relativity, it is almost certainly a typo or a confusion on the author's part. Geodetic is the adjective associated with geodesy, which is the branch of geography dealing with assigning coordinates to the Earth.
Feb
8
answered do Significant Figures apply with numbers without units?
Feb
8
reviewed Close How did I get these strange electric shocks?
Feb
8
reviewed Close Is light relative?
Feb
8
reviewed Close measurement of tripartit qubit state