Perpetuum mobile ipak moguć?

[ Fitopatolog @ 03.08.2014. 17:43 ] @

Perpetuum mobile ipak moguć:

http://www.vestinet.rs/zanimlj...-koji-ne-koristi-gorivo-a-radi

?

[ Ivan Dimkovic @ 03.08.2014. 18:23 ] @

http://en.wikipedia.org/wiki/EmDrive

U vezi NASA eksperimenta:

Citat:

Thrust was observed on both test articles, even though one of the test articles was designed with the expectation that it would not produce thrust. Specifically, one test article contained internal physical modifications that were designed to produce thrust, while the other did not (with the latter being referred to as the "null" test article).

As for the Cannae drive test article, Nova reported that "In the paper, NASA seemed reluctant to dive into the drive’s mysterious physics. They wrote nothing to suggest how, exactly, the force was produced. In fact, the mysterious drive actually worked even when they modified it in such a way it shouldn’t have produced any thrust, suggesting the mechanics of the system are hazily understood.

Najverovatnije objasnjenje za sve ovo je da trenutno ne postoji zadovoljavajuce razumevanje (objasnjenje) funkcionisanja tog uredjaja.

To ne znaci da je u pitanju nekakav perpetuum mobile (niti da je uredjaj koristan za bilo sta), vec samo da ocigledno jos nije ulozeno dovoljno truda da se utvrdi sta se tacno desava mehanicki.

Ako uredjaj ima upotrebnu vrednost tj. nesto radi bolje od stanja nauke, nece imati problem da nadje prakticnu primenu.

Sa druge strane, informacije o "NASA testiranju" deluju malo "napumpane". Objektivno radi se o jednom naucnom radu prezentovanom na konferenciji, gde su autori (iz NASA-e) prezentovali rezultate. Dakle, ne radi se o nekakvom NASA konkretnom projektu. Ovo je par internet medija prenelo sa akcentom na rec "NASA", davajuci celoj stvari prizvuk kakav, bar za sada, ne zasluzuje.

[ Ivan Dimkovic @ 03.08.2014. 18:35 ] @

Konkretan rad, za zainteresovane:

http://ntrs.nasa.gov/search.jsp?R=20140006052

I zakljucak za one koji nemaju vremena da citaju:

Citat:

Future test plans include the development of an automatic frequency control circuit. Test results indicate that the RF resonant cavity thruster design, which is unique as an electric propulsion device, is producing a force that is not attributable to any classical electromagnetic phenomenon and therefore is potentially demonstrating an interaction with the quantum vacuum virtual plasma. Future test plans include independent verification and validation at other test facilities.

[ ventura @ 03.08.2014. 19:25 ] @

Koliko sam čitao nešto brzinski o tome, najverovatnije "casimir effect" stoji iza toga.

[ Shadowed @ 04.08.2014. 10:14 ] @

Ovo je PM koliko i usisivac. Ni on ne koristi gorivo :)
Oba rade na el. energiju a.k.a. struju.
Ono sto ovde nije jasno je KAKO radi :)

[ Ivan Dimkovic @ 05.08.2014. 17:04 ] @

Smislena diskusija i analiza eksperimenta:

https://plus.google.com/117663015413546257905/posts/C7vx2G85kr4

Ukratko, fakat da su NASA-ini istrazivaci dobili potisak i tamo gde ne bi trebalo da ga bude daje dosta razloga za sumnju da je ceo eksperiment imao neki propust.

Ukratko:

Citat:

1. They tested a device that was designed to work and one that was designed not to work. They both worked.

2. They tested the devices in a "vacuum chamber", but they didn't take the air out.

3. They didn't carefully study all possible causes of experimental error... like their devices heating the air.

Linkovana diskusija ima vise detalja za svaku od ovih tacaka. Preporucujem.

Ceo pristup popularne stampe ovome je besmislen i vrlo je slican izvestavanju o OPERA eksperimentu. Izvanredne stvari u fizici zahtevaju izvanredne dokaze.

U ovoj fazi, umesto price o tome kako ce nesto revolucionarizovati svet je daleko pametnije prvo dobro pretresti da li negde nije doslo do greske, posto u ogromnoj velicini slucajeva "izvanredne" stvari u fizici se pokazu da su bile samo izvanredne greske i nista drugo.

[ cika dacha @ 13.10.2014. 12:26 ] @

[ cika dacha @ 24.11.2014. 23:35 ] @

veceras na Discovery gledao sam deo emisije Outrageous acts of science gde je prikazan lik kako na vodi skija pomocu padobrana mislim da se taj sport zove Kite skiing al nisam siguran, gde je on postavio Ginisov rekord u brzini skijanja na vodi sa padobranom, a kretao se BRZE od vetra!!??!!!!
Zar to nije perpetuum mobile?!

Sigurno ima na yt prilog tj snimak gde mozete da vidite ceo prilog!

[ Shadowed @ 25.11.2014. 01:08 ] @

Citat:

cika dacha: Zar to nije perpetuum mobile?!

Nije.

[ cika dacha @ 25.11.2014. 12:55 ] @

budi ljubazan pa mi objasni.
Hvala

[ Shadowed @ 25.11.2014. 13:38 ] @

Plovi se pod uglom na vetar pa se koristi efekat slican kao kod krila aviona.
Ne znam dovoljno detaljno da bih lepo napisao objasnjenje ali imas clanak na wikipediji o tome - http://en.wikipedia.org/wiki/Sailing_faster_than_the_wind

[ cika dacha @ 25.11.2014. 13:39 ] @

Ok
Hvala