Liste des Groupes | Revenir à p relativity |
On Sat, 3 May 2025 21:17:30 +0000, rhertz wrote:Yeah, "momentum is conserved, ..., 'in the open'", though it really
>You have some problems with text comprehension. Also, your>
micro-temporary memory doesn't help you. That's why you live from old
memories. Aging took a toll from you.
>
I clearly wrote: "Angular momentum IS NOT CONSERVED on Earth. MAYBE, AND
LOCALLY, in
outer space and up to Mars".
>
>
FRICTION, PROK, FRICTION! (among several other factors like air drag,
quantum effects, etc.).
>
ANGULAR AND LINEAR MOMENTUM ARE CONSERVED (MAYBE) IN THE LOCAL OUTER
SPACE.
>
>
Remember: FRICTION, AMONG OTHER THINGS, PREVENT THAT MOMENTUM BE
CONSERVED ON EARTH.
Wrong, Richard.
>
The angular momentum of a rotating object does not disappear due
to friction, but gets dispersed even down to the molecular level.
>
If you spin up a gyroscope in an "anti-earthwise" direction, the
whole Earth slows in its rotation. Then, as the angular momentum
is dispersed due to air friction, the whole Earth eventually speeds
back up, but the speed-up of the Earth is not necessarily immediate
because the angular momentum is first dispersed in whirls and
vortices of the air.
>
If you spin the gyroscope in vacuum, the coupling between the
gyroscope's rotation and the Earth's rotation due to friction with
the bearings is more immediate.
>
Conservation of angular momentum applies to a CLOSED SYSTEM.
It is nonsense to claim that it is not conserved because individual
components of the closed system may speed up or slow down.
Les messages affichés proviennent d'usenet.