Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.physics > #567035
| From | Sergio <invalid@invalid.com> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: Momentum, energy and angular momentum cannot be created or destroyed |
| Date | 2016-03-31 16:03 -0500 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <ndk3br$ren$1@gioia.aioe.org> (permalink) |
| References | <ZJadnYw_CMkg92DLnZ2dnUU7-YOdnZ2d@giganews.com> <ndjtc7$has$1@gioia.aioe.org> <ndjupf$ce3$1@dont-email.me> |
On 3/31/2016 2:49 PM, Poutnik wrote: > Dne 31/03/2016 v 21:21 Sergio napsal(a): >> On 3/31/2016 1:21 PM, Sam Wormley wrote: >>> Momentum, energy and angular momentum cannot be created or destroyed >> >>>> >>>> This can be stated simply, "Momentum, energy and angular momentum >>>> cannot be created or destroyed." >> >> hold on, >> >> momentum and angular momentum are vectors, energy is not. > > Yes, but it is not relevant. seems like the units would have to match > >> >> also each of the above can be changed into other forms, and into heat, >> which is both created and destroyed. >> > > Could you illustrate how any of above > can be changed to the other ones ? > > bow and arrow, arrow flies to hit blade on wind direction indicator rotating it around, (arrow stopped) so linear momentum transformed into angular momentum rotation of wind indicator, with friction losses. lots of other examples, linear to angular . also it seems Energy should include both kinetic and potential. and Energy can be dispersed so widely it is hard to measure, therefore can be considered destroyed. guess there is a time factor in that somewhere too
Back to sci.physics | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Momentum, energy and angular momentum cannot be created or destroyed Sam Wormley <swormley1@gmail.com> - 2016-03-31 13:21 -0500
Re: Momentum, energy and angular momentum cannot be created or destroyed jimp@specsol.spam.sux.com - 2016-03-31 18:33 +0000
Re: Momentum, energy and angular momentum cannot be created or destroyed Sergio <invalid@invalid.com> - 2016-03-31 14:21 -0500
Re: Momentum, energy and angular momentum cannot be created or destroyed Poutnik <poutnik4nntp@gmail.com> - 2016-03-31 21:49 +0200
Re: Momentum, energy and angular momentum cannot be created or destroyed Sergio <invalid@invalid.com> - 2016-03-31 16:03 -0500
Re: Momentum, energy and angular momentum cannot be created or destroyed Poutnik <poutnik4nntp@gmail.com> - 2016-04-01 07:49 +0200
Re: Momentum, energy and angular momentum cannot be created or destroyed Timo <timo@physics.uq.edu.au> - 2016-04-01 01:14 -0700
csiph-web