Quite right...I was wrong ...although now we have some "excess heat" ;-)
I brought the figure skater into the discussion to explore the relationship between internal energy and rotational motion. Exploration permits discovery. This is as true in conceptual world as it is in the material world. The nuclear energy of an atom is like the skater's chemical energy. A skater atom is different from Mill's hydrino atom. The former would change mass into energy in order to shrink, whereas Mill's hydrino liberates energy in order to shrink. Harry On Sun, Feb 9, 2014 at 4:41 PM, David Roberson <dlrober...@aol.com> wrote: > Harry, I believe I understand what you are saying. The girl pulls her > arms in rapidly, but the movement is along a single line to her side which > does not generate a torque as far as I am aware. If no torque is produced, > then there can be no change in angular momentum. > > She does produce energy by moving her arms, but this would appear as heat > once her arms come to a stop by her side. > > Dave > > > > -----Original Message----- > From: H Veeder <hveeder...@gmail.com> > To: vortex-l <vortex-l@eskimo.com> > Sent: Sun, Feb 9, 2014 2:38 pm > Subject: Re: [Vo]:Linear and Angular Momentum > > Dave, I am saying if you carefully measured her final speed while > considering losses due to friction and drag, her final speed would be > slightly greater than could be explained by conservation of angular > momentum alone. This is because she does some work in order to bring her > arms inwards. In effect she has converted some internal chemical energy > into angular momentum. Or is this wrong? > > Harry > > On Sun, Feb 9, 2014 at 1:33 PM, David Roberson <dlrober...@aol.com> wrote: > >> Harry, the skater pulls her arms inwards but that does not contribute to >> her rotating motion directly. The increased speed is due to the reduction >> of her moment of inertia and the conservation law requires for her to spin >> faster so that the product of her moment of inertia and angular velocity is >> constant. >> >> Dave >> >> >> >> -----Original Message----- >> From: H Veeder <hveeder...@gmail.com> >> To: vortex-l <vortex-l@eskimo.com> >> Sent: Sun, Feb 9, 2014 1:05 pm >> Subject: Re: [Vo]:Linear and Angular Momentum >> >> >> A spinning figure skater is often used to demonstrate the principle of >> conservation of angular: >> >> https://www.youtube.com/watch?v=jeB4aAVQMug >> >> However, the skater also exerts some muscular energy to pull her arms >> inward, so doesn't this boost the angular momentum slightly? >> >> Harry >> >> >> >> >> >
