L’aspirisouffle Flight of fancy



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  • Nota bene

38

C’est le même phénomène qui fait monter le parfum dans mon vaporisateur

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The same effect makes the perfume come out of my spray.

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На същото явление се дължи издигането на парфюма в моя пулверизатор
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…et qui aspire les fumées dans les cheminées, grâce au vent.

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…and it sucks smoke up chimneys – with help from the wind.

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... и поради това пушекът се всмуква в камината.

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Depuis quand les cheminées parlent-elles ?

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I never knew chimbleys spoke before!

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Откога камините могат да говорят?

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Bizarre, j’aurais plutôt cru que l’air se serait entassé dans cet entonnoir.

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Nuts. I’d always fought that the air got trapped in this bloomin’ funnel!

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Странно, по-скоро бих си помислил, че въздухът се е насъбрал в тази фуния.

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Enoncé suivant la LOI DE BERNOULLI :

Pression et vitesse varient inversement.



La Direction

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Here is an announcement:

BERNOULLI’S LAW:

Pressure and speed vary inversely

The Boss

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Обявяваме, че според ЗАКОНА НА БЕРНУЛИ:

Колкото е по-голяма скоростта на въздушния поток, толкова е по-малко налягането в него и обратно.



Ръководството

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A la vérité, la mécanique des fluides défie bien souvent notre intuition et notre sens commun.

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It’s true – fluid mechanics really does defy intuition and common sense.

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Всъщност, механиката на флуидите често не се подчинява на нашата интуиция и здрав разум.

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39

Exemple de



PARADOXE lié à la loi de Bernoulli :

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Example of a

PARADOX related to Bernoulli’s law…

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Пример за ПАРАДОКС, свързан със Закона на Бернули:
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C’est pas intuitif pour un rond. Enfin…

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It sure ain’t h’intuitive an’ that’s a fact! Now -

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Интуицията е неприложима към опита с диска и тръбата. Тогава...

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Qu’est-ce que c’est que cela ? Encore un de leurs trucs !

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‘ere, wot’s this ‘ere there then?

Anuvver one of their bleedin’ toys?

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Какво пък е това? Още едно от тези неща.

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ASPIRISOUFFLE

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BLOWSUCKER

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ДУХАТЕЛНА ТРЪБА

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Apparemment c’est un simple tube collé sur un disque

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It jus’ looks like a cardboard choob stuck to a disc…

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Прилича на най-обикновена тръба, прикрепена към диск.

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Tube qu’il pose sur une boite d’allumettes !!!

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Now, why’s ‘e stickin’ the choob on to that box of matches?

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Тръба, която поставя върху кибритена кутия!

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40

Il…souffle…et il soulève la boite !!!

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Wotthe’eck? ‘e – ‘e’s blowin’ an’ it’s liftin’ the box!!

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Той... духа... и повдига кутията!

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Misère…

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Cripes

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Олеле!

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Comment peut-on aspirer en soufflant ?

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‘ow can yer suck by blowin’?

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Как можеш да вдишваш въздух, докато го издишаш?

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Au raccord cylindre - disque, la section de passage du gaz diminue brusquement et l’air est violemment accéléré. La pression devient alors inférieure à la pression atmosphérique.

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At the junction of the cylinder and the disc, the width for the gas to pass through drops suddenly, and the air speeds up violently. The pressure drops below that of the atmosphere.

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На мястото, където цилиндърът и дискът се свързват, широчината на прохода за газа изведнъж се свива и скоростта на въздуха рязко се покачва. Налягането става по-ниско от атмосферното.
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La partie périphérique est, par rapport à la pression atmosphérique, en dépresson

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…the outside part is at a lower pressure than the atmosphere.

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Налягането в периферната част е по-ниско от атмосферното.

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La portion de la paroi de la boite qui est en face de canal central, se trouve, vis-à-vis de la pression ambiante, en surpression

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The part of the box opposite the hole in the tube is at a higher pressure than its surroundings…

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Тази част от стената на кутията, която е разположена срещу централния канал, се намира в състояние на повишено налягане по отношение на околния въздух.
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41

Il se trouve que le résultat de tout cela est une succion

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It turns out that the result of all that is suction

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Оказва се, че резултатът от всичко това е всмукването.

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Vous pouvez réaliser une expérience analogue avec une simple feuille de papier :

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You can produce a similar effect using only a sheet of paper.

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Можете да осъществите подобен опит с най-обикновен лист хартия:

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Tenez-la comme ceci

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Hold it like this…

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Дръжте го ето така.

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Soufflez ici, très fort.

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Blow here, very hard…

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Духнете силно тук.

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Dès que vous soufflez, lâchez la feuille. Elle restera un court moment plaquée.

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As you blow, let go of the paper. It will stay in place for a few moments.

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Докато духате, пуснете листа. Той ще остане прегънат за известно време.
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Nota bene :

Il faut souffler FORT !



La Direction

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N.B.

Blow HARD!!



The Boss

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Забележка:

Трябва да се духа СИЛНО! Ръководството

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42

Tu viens voler un peu ?

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How about coming for a flight?

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Да не се каниш да летиш?

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Avec tout ce que j’ai vu aujourd’hui, je préfère aller à pied !

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After wot I seen today, mate, I’d rather walk!!!

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След всичко, което видях днес, предпочитам да вървя пеша.

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Fluide, densité, pression, température, réaction Bernoulli. J’ai tous les maîtres - mots pour voler.

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Fluid, density, pressure, reaction, Bernoulli – I should have all the words I need to get off the ground.

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Течна среда, плътност, налягане, температура, формула на Бернули. Имам всички необходими думи, за да полетя.
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BERNOULI

REACTION


TEMPERATURE

PRESSION

FLUIDE

DENSITE
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БЕРНУЛИ

РЕАКЦИЯ


ТЕМПЕРАТУРА

НАЛЯГАНЕ


ТЕЧНА СРЕДА

ПЛЪТНОСТ
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Non, il t’en manque un

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No, there’s one missing.

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Не, една дума ти липсва.

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Lequel ?

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Which?

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Коя?

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43

LE SONGE DE LANTURLU :

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ARCHIBALD’S DREAM:

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СЪНЯТ НА ЛАНТУРЛУ

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Nom d’un vortex où suis-je ??

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Good grief! Where am I?

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И таз добра! Къде съм?

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Apparemment je suis dans un submersible. Quel endroit inquiétant !...

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Apparently in some kind of submarine. That gives me a sinking feeling…

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Май съм в подводница. Много несигурно място.

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Il faut que je sorte d’ici au plus vite

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I’ve got to get OUT of here fast!

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Трябва час по-скоро да изляза оттук.

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Cette machine a deux modes de propulsions, des rames et une hélice mue par des pédales.

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There seem to be two ways to move this machine – Oars, and a propeller driven by pedals.

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Тази машина може да се задвижи по два начина – с гребла и с витло, задвижвано от педали.
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44

Diable, je pédale depuis une heure…

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Hell, I’ve pedaled for an hour

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По дяволите, вече един час въртя педалите...

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…et je n’avance pas d’une pouce !

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…and I haven’t budged a millimeter!

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... и не напредвам и сантиметър!

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Essayons les rames…ça ne donne rien non plus…et je ne sens aucune résistance !!

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Let’s try the oars…they’re not doing anything either. There isn’t even any resistance!

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Да опитам с греблата... Пак нищо не става... Не усещам никакво съпротивление!

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Je dois être dans le vide ?

Et non, si j’étais dans le vide, mon submersible ne flotterait pas !

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Am I in a vacuum?

No, the submarine wouldn’t float…

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Сигурно се намирам в пустотата. Не, ако бях в пустотата, подводницата ми нямаше да се движи.

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45

Tiens, on dirait que je remonte

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Crikey, it looks like I’m surfacing!

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Виж ти, сякаш се изкачвам.

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Par tous les tourbillons de l’enfer, Sophie, explique-moi ce que tout cela signifie !

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By all the wind-devils of hell, Sophie – what’s been going on?

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В името на всички дяволи, Софи, обясни ми какво означава всичко това?

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HELIUM SUPERFLUIDE

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SUPERFLUID HELIUM

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ХЕЛИЙ СУПЕРФЛУИД

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46

Tu étais simplement dans de l’hélium SUPERFLUIDE. Rappelle toi l’histoire de la caisse de sable. Le frottement des grains les uns sur les autres était tellement important que le sable s’écoulait avec difficulté. Ici c’est l’inverse.

En dessous d’une certaine température, très basse, la fluidité de l’hélium devient infinie et les frottements nuls.

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You were just in some SUPERFLUID helium. Remember what happened in the sandbox? The friction of the grains of sand against each other was so great that the sand only flowed with difficulty.

Here it’s the opposite. Below a certain very low temperature, the fluidity of helium becomes infinite, and there is no friction at all.

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Ти просто се намираше в хелий, СУПЕРФЛУИД. Припомни си случая със сандъчето с пясък. Триенето на песъчинките една в друга бе толкова силно, че пясъкът трудно можеше да изтича. В този случай е обратното. Под определена много ниска температура течливостта на хелия става безкрайна , а триенето – нулево.

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Mais quel rapport entre les frottements, et le fait de ramer, de voler, ou de se propulser à l’aide d’une hélice ?

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But what’s friction got to do with rowing, flying, or propelling yourself with a propeller?

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Но каква е връзката между триенето и гребането, летенето или придвижването с помощта на витло?

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Tu avais raison, en un sens, avec ton parapluie. Pour prendre appui sur l’air, il faut avoir prise sur lui.

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You had the idea, in a way, with your umbrella. To get support from the air you have to grab hold of it.

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В известен смисъл имаше право, с чадъра. За да се задържиш във въздуха, трябва да се държиш за него.
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Si l’air était SUPERFLUIDE, ton parachute ne te servirait à rien. Pire, il ne se gonflerait même pas et tu tomberais en chute libre !

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If the air were SUPERFLUID, your parachute wouldn’t be any use. Worse – it wouldn’t open, and you’d fall like a stone.

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Ако въздухът бе СУПЕРФЛУИД, парашутът нямаше да ти послужи за нищо. Дори по-зле – той нямаше да се издуе и ти щеше да паднеш!

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47

Le premier animal qui entreprit d’escalader les cieux comprit vite qu’il lui faudrait s’accrocher, d’une manière ou d’une autre, à ce milieu.

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The first creature who tried to reach for the sky quickly found out that one way or another, it would have to grab the air…

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Първото животно, което се е опитало да се издигне в небето, разбрало бързо, че по един или друг начин трябва да се задържи за тази среда.
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Ainsi le vol d’un plus lourd que l’air est semblable à une course permanente où l’on tente de prendre appui sur un milieu inconsistant qui se dérobe sans cesse.

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So the flight of a heaver-than-air device is like an endless attempt to gain a hold on something so tenuous that it always slips from your grasp.

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По този начин полетът на един обект, който е по-тежък от въздуха, прилича на безкраен опит да се задържиш за нещо толкова разредено, че винаги ти се изплъзва.
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Encore faut-il pouvoir prendre appui sur ce milieu.

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So you have to find some way to get support from such a medium.

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Може още веднъж д опиташ да намериш опора в такава среда.

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Si celui-ci est SUPERFLUIDE les molécules glissent les unes sur les autres et sur les objets sans aucun FROTTEMENT.

Les oiseaux sont alors contraints d’aller à pied, les éoliennes ne tournent pas et les transports aériens ne peuvent être assurés que par des ballons propulsés par réaction.

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If it’s SUPERFLUID, the molecules slip past each other, and past objects, with no FRICTION.

The birds would have to go on foot, windmills wouldn’t turn, and aerial transport would have to be achieved using balloons with reaction motors.

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Ако тя е СУПЕРФЛУИД, молекулите се плъзгат една в друга и върху обектите без никакво ТРИЕНЕ.

Тогава птиците щяха да бъдат принудени да ходят пеша, вятърните мелници нямаше да се движат, а въздушният транспорт щеше да се извършва само с балони, които се движат благодарение на реактивна тяга.


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Le vol est donc lié au frottement gazeux.

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Flying thus depends on gaseous friction.

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Следователно полетът е свързан с триенето на газовете.

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