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friction and terminal velocity of a parachutist vs a car
friction in a fluid is:
force of friction=k*h*v where k is a constant that depends on the fluid , h depends on the shape of the object and v is the velocity the object has so you can see if the object is acelerating v will grow eventually getting to be equal both the force that causes the aceleration and the force of friction reaching the terminal velocity that a parachutist fro example reaches but on a surface its different: force of friction=normal force*MU, where mu is a constant but the problm here is that this means that if you apply to an object a force bigger than this force of friction it will be acelerating for ever(force applied-force of friction)= m*a (f=ma which btw is also proved wrong by relativity) so in this case terminal velocity is NOT reached this teaching on friction is universal and FALSE oh god im wishing so much to finish my studies to dedicate my time to art:mad: |
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The second example is theoretical. If we could have infinite power then you would not reach terminal velocity- you are in powered movement, not freefall. There is no terminal velocity in powered movement, rather a final velocity based on the thrust generated and the air and frictional resistances. Each engine in the car will have a limit to the force it generates which governs top speed. Top speed has nothing to do with terminal velocity, unless you are driving off a rather tall cliff! |
not really if you apply a force of two newtons to a 1 kg car and theres a rolling friction of 1 N applying f=ma you have a constant aceleration of 1 m/s
everybody knows the faster you go the more it takes to acelerate according what im studying this is just due to wind friction but I THINK this is also due to rolling friction increasing with velocity which what im studying denies or neglects edit: if what i say its true it brings new grounds on driving you could have more grip if the wheels turn fast enough skidding than gripping since if v affects friction could be posible to make v as high as that dinamic friction gets bigger than static friction in fact i recall in f1 times when the cars did go all skidding |
raaaid do you have a job?
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Power required to overcome is: P= 1/2 p v^3 A C . Therefore (ignoring constants) power to overcome increases in relation to the cube of velocity, which is not negligible and is the major problem. |
and what would happen if you had a road in the moon
could a 50 horse power car amke the moon rover reach 30000 km/hour taking into account the terminal velocity thing only happens for fluid friction and nor for road friction? nope i dont have a job now ususally i teach english to kids |
Poor kids.
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Raaid you are posing questions that a lot of kids ask when taught Newtons Laws and formulae such as F=MA. eg, brighter kids will ask - "so, in the void of space, where there is no air or friction why can't a space ship reach the speed of light?" and we end up with all sorts of difficult concepts such as 'uniform acceleration in a straight line', etc, etc........at which point kids either decide to study and take exams in something more easily understood......:grin:
And, amid this you have the laws of 'conservation of energy' and Friction has to obey this law regards the energy input and useful energy out. E.g, a car accelerating will create more internal/external friction, more heat energy, probably more sound, and the useful energy is ever diminishing. |
oh havent you noticed my patience? you need that to deal with kids
i never get annoyed however much attacked i have a degree in english filology but really what capacitates me for that is my inherited patience :) |
according what im studying:rolleyes: if you drop a block in a ramp and the block moves it does it in an ACELERATED fashion
come on it calls to the common sense it will very soon reach terminal velocity and that at that low speeds wont be due to the wind resistance so dynamic force of friction in surface= MU* normal force is FALSE what i wonder is if it is a typical neglection or just a wrong conceptualization |
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yes definitly my 1st try is gonna make my living out of art
my plan is selling painted figure by ten-15 euro check out some: http://i40.photobucket.com/albums/e2...Imagen0044.jpg http://i40.photobucket.com/albums/e2...Imagen0102.jpg http://i40.photobucket.com/albums/e2...Imagen0101.jpg http://i40.photobucket.com/albums/e2...Imagen0043.jpg http://i40.photobucket.com/albums/e2...Imagen0041.jpg http://i40.photobucket.com/albums/e2...Imagen0103.jpg http://i40.photobucket.com/albums/e2...80412-1738.jpg and my favourite: notice how the music syncs perfectly http://www.youtube.com/watch?v=AZtkh...ure=plpp_video the thing is that theres litle offer on painted sculptures on ebay |
Raaid, "conservation of Energy' laws apply - E=1/2MVsquared, Potential energy, kinetic energy, etc, all apply. That block will lose energy for a whole bunch of reasons as it slides down (useful energy being converted into other and unwanted energy forms) but at any point the energy sum must always be equal to the starting energy before you dropped it onto the ramp.
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hey i agree with conservation of energy since it implies conservation of info
every though you have gets carved in the universe :) i just say f of f= mu* normal is wrong |
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Philology..... |
can you sculpt a 'troll face' ?
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Poor Raid, shot down more times on the forum than in the game...
Is this supposed to be Yoda? http://i40.photobucket.com/albums/e2...Imagen0101.jpg It was the image you used in you sig for sometime but I thought it was something you had gotten from a kinder egg or something... because the picture was small. |
Actually if you manage to drop a car and a parachutist simultaneously off the Leaning Tower of Pisa without getting caught by the Polizia they will hit at roughly the same time. This is because the tower is not high enough for the parachutist to accelerate to a high enough speed for the parachute to inflate. Unfortunate for the parachutist.
This is the dangerous bit of base jumping. When exiting an aircraft the aircraft forward velocity is sufficient to inflate the chute so if need be you can deploy instantly. When base jumping you need to fall quite a ways before your chute will inflate. Now .... what would make it interesting is if you drove a car off a short cliff (such as the edge of a gravel quarry) of a similar height to the Leaning Tower of Pisaand had a parachutist leap out at speed. I would leave this experiment for professionals like the mythbusters, it could be dangerous at home. http://www.quakr.co.uk/quakr/xtech07...tower_orig.jpg |
Oh .. and some questions for Raaid to research ...
- do spinning objects actually fall slower ? - do they fall slower even in a vacuum ? - if you spin them fast enough can they even hover or go up? :D |
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And what would happen is you fixed a piece of buttered bread buttered-side-up to the back of a cat, and dropped it from the Leaning Tower of Pisa? Would it land buttered-side-down, or on its feet? And if you dropped it in a box, would Schroedinger expect it to be in a buttered-side-down or feet down position before he opened the box? ;) |
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Adding jam or using a muffin may confound the results. |
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Hopes are on not to dream of that spinning toast-cat, now... |
Hi Raaaid,
what exactly is this "terminal velocity of a parachutist vs a car"? Is that the speed which when exceeded by a parachutists who is going to hit a car terminates his life? Are you searching for the correct formulas for two cases? 1) The parachutist is falling down through the air and hits the car 2) The car is moving horizontally and hits the parachutist after he has landed Well i have no mathematical proof but regardless friction they'll be the same. |
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Dunno... put the parachutist and the car (or a feather and a rock) in a vacuum and they'd both (if released at the same time) hit the deck at the same time?
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http://img.photobucket.com/albums/v1.../th_before.jpg http://img.photobucket.com/albums/v1.../th_during.jpg http://img.photobucket.com/albums/v1...s/th_after.jpg |
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In reality, tire companies and racers use friction coefficients much greater than 1 based on emperical studies. --Outlaw. |
what i think now is that nowadays racing tyres have so much difference between dynamict and static coeficients of friction that drive gripping is an advantage over sliding
but i recall mentioned times when sliding was an advantage i can see why by dynamic friction increasing with speed probably in this old components dinamic and static coeficients were close |
Perhaps that is the problem with the parachutist, insufficient static coeficients of friction.
It is possible that could be improved with buttered toast. |
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So your saying you belive the coefficient of friction of tires has changed over your lifetime? And that somehow your existence on this planet has affected the coefficient of friction of tires? Hmmmmm You may be onto something there? Because looking at your picture, I think if you were to plot the number of hairs on your head for each year of your life THAN TAKE THE INVERSE OF THAT GRAPH And than plot the coefficient of friction of tires for each year of your life I predict that they will be trending in the same direction! At which point I think you could make the argument that your existence on this planet has in some way affected the coefficient of friction of tires over your life time! |
Not sure about that but googling parachutes and motor vehicles I did find this:
http://anticipatethis.wordpress.com/...d-what-no-186/ http://anticipatethis.files.wordpres...hute.png?w=720 Warning do not try this at home. Interestingly most discussions on parachutes discuss Lift not friction. |
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god almighty, is this insanity really still going?!
Guys don't you realise you're doing this man only a great deal of harm by indulging him? :confused: |
but stern you said i was not crazy that i was just a weirdo
now you imply i am maybe youre just acting with a convenient role according the circumstances? |
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well besides people here are not indulging theyre just laughing at me
whay i say: if dynamic friction is not a function of velocity is wrong because a block falling in a ramp will reach a terminal velocity what can i do if 99% of people study for the printed paper the only righteous person in this thread its been outlaw |
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Still, there are many ways to try to interpret one's behaviour. |
if i ever employ anybody for anything ill make sure to discard anyone with university studies
"Every ‘complete’ course in basic physics treats Coulomb’s famous inverse square law of electrostatic force. Few courses, however, associate his name with the law of sliding friction, also treated. Perhaps influenced by the work of Leonardo DaVinci, Coulomb provided in 1779 a treatment of sliding friction that has stood the test of time. His law is expressed in terms of two constant coefficients, one being of kinetic type, the other static, with the latter being larger than the former. Surprising to most, the magnitude of the force of friction between two surfaces is to first order independent of both speed and the area of contact—depending only on the normal force N between the surfaces." ALL SCIENCE IS PROMOTED BY PETROCHEMICAL COMPANIES TO CONFUSE INVLEIGE AND OBFUSCATE, THE MORE YOU STUDY THE MORE STUPID YOU BECOME edit: ill have to point it to you dont i: it produces the same friction 1 square cm than 1 square m if the weight its the same, that is the normal force if people believes this bs probably theres a guy working for the government thinking hey what news will we make up today, funny, terrorific, peismistic,optimistic.... |
Wow seriously but hurt aren't you raaaid, how many times did you fail to get a degree?
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i have one degree in english literature and im 3 subjects away from getting one ine engineering
still im responsible enough as to never applied those knowledge curiously the higher the qualification the more people believe in darwin blind faith:rolleyes: edit: i want to make a game with subsonic mind altering sound certain frecuencies make you happy, others make you scarred do you think i can study this in college? where in medicine college? the number one population control tool of the state which proposed put rat poison in water so not to have cavities? |
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To the rest of your blather, I say so what? So far I've yet to see Raaaid cause you any harm, Stern. I on the other hand find him amusing. Perhaps if you spent less time knowing everything and more time laughing at yourself, your pitiful existence might be less dark. Let me give you a clue: When you see a thread by Raaaid, don't open it. You'll have much less stress, and so will the rest of us. |
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You'll need to be investigating harmonics, not frequencies per se ;) |
you see guys accept it this system is nightmare like, is not like we live in a perfect wrold but we live in an extrem dystopyan one where we are given rat poison in water and 99.9% believes it heals cavity yet they still have them
but the refusal of people to see this makes the rebel look bad to his eyes such an imperfect world is just perfect for a rebel as me :) |
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--Outlaw. |
yes but then why am i forced to study that friction is independent of surface and velocity if its false
whats the point of studying a false thing except for detecting it though im sure that is not the point its really frustrating having to study things you dont share, i often feel like studying religion instead of scinece realize that coulombs law on friction though false is studied at college level world wide |
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He behaves like this everywhere and when he gets kicked out he moves somewhere else to do it. He does it because he enjoys it and has nothing better to do. A forum on a sim is not a place for your personal ramblings that don't follow any logic whatsoever. If he really cared to talk about this and spread his ideas he would make his own blog or website, instead he just loves to troll in here with this utter nonsense. It's because it's done with the awareness that it's gonna annoy people that it's considered trolling. |
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--Outlaw. |
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well i like people laughing even if its as me
a degree its complete 3 years in college in a subject i almost have two of those i admitt im a troll but my intend its to cause GOOD EMOTIONS as for example to ponder: what if the media is a lie and the unvierse is utterly perfect i would stimat a 0.001% of this to be true, enough as to not have the conviction the universe is evil contrary to if the media tells the truth |
So why cant you combine sentences together into a paragraph instead of making each sentence a paragraph? ;)
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show me a single post of mine of negative kind
i can show many hate speech on this thrad still admitt that as of ases made me laugh :) |
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The funny part is when you get too much att and than try to play the role of the victum |
when i was working in london they forbid me to go to the kitchen cause people got distracted by my getting so much attention
in the end they wouldnt even let me use the comunicator to the kitchen cause people would get all excited to hear my voice for example what i did in this thread to call attention but to be myself? as someone said to me once i have a personality that causes addiction on others, hey thats not my fault in fact im so damn atractive that even people who cant stand me cant resist and read me ;) |
Yes it is a well known fact that human nature is drawn to a train wreck
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sure they do:
http://4.bp.blogspot.com/-mzvbYIHnut...e-poster-7.jpg by now i got to unlock the fornix of the brain, a muscle in the brain which i contract or relax at will wait till i dixcover the philosophers stone and make it public a world without lies where the most powerfull people today will be given away and start working giving away free popcorn if they waant food after the revolutionh |
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The fornix is an arching bundle of white muscle fibres located just below the corpus callosum within the brain. Its rear portion is attached to the corpus callosum, but in the front, it is attached to it by the septum pellucidum. The fornix features two symmetrical halves, one of which extends slightly into each of the hemispheres of the brain. These parts are connected in the middle (at the body of the fornix) but separate in the front and back to form the anterior pillars and posterior pillars, respectively. The body of the fornix is a flattened triangular shape, which is slightly narrower in the front than in the rear.
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Raid didnt write that... Its in paragraph form. Hmm, how do you know your not just moving your ears?
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I thought you said you never cut and paste stuff raaaid?
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by unlocking different uncouncious function of the eyes and making them go councious i discovered i could tense something in the midel of my head
researching i found out its a muscle in the midel of the brain in the corpus callosum called the fornix now i can understand people gets scared to the posibilty of the world without lies that i want, well dont worry you would be surprised on how childish and mean most people are, youre not alone |
raaaid, have you tried re-growing hair by holding your nose and straining?
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I'd consider that a negative. --Outlaw. |
oh come on the world appears an horrible place, i have a very happy life but thats not enough, everybody should be happy, even bad people
so i do my vest to change the wrold for good how? discovering how to unlock the dormant abilities of the brain the thing is that in a sunny day if i contract the fornix muscle inside my head for two minutes i get to see perffect without glasses though i have 8 dioptries of shortsightedness once in a chat a guy named magico whom appear to read my mind sugested me i was l*****r, another guy who was chizophrenic named magic whom i sympathize with told me that a book named the rebelion of .... was how about l*****r rebelled cause his twin soul had been sentenced to death, when i read that book nowhere that was mentioned now i understand im a normal guy that by the sheer coincidence of being shortsighted and having an inquisitie mind discovers the philosphers stone and having a good heart shares it with the world to make abetter place but the thing is that there are many who are horrorized into living in a world without lies in which people know what they re worth so they made my life the wosrt they could with time travel, these are the transhuman borg who want a chip in their head with wchich to read others mind but his cant be read by tohers for example in 2002 they show me this on tv after working on on me, this was the grape of the cake in order to drive me crazy: http://www.youtube.com/watch?v=4b055P-fztE in 2003 they drove me crazy again m¡by showing me: a guy with a defigurated face telling jokes in a comedy channel arthur c clarcke admitting paedophilia on tv, the lost daily mirror tape a documental on how chicken meat could be any kind of meat for being added a product that reduce geneticp pairs of proteins from millions tow just two genteic pairs simpsons making a show about rat milk so after a week puking they succeded uin driving me crazy again then five years later they tried to drive me crazy through tv again this program is the jewel of the crwon of what i saw those days including 15 minute of roadkill and a phisicist claiming to become God thorugh ttranshumanism and menacing to kill anybody in his way this in the history channel at 1700 and all tv for a period of two days like this this time i got inmune to their method of driving me crazy WARNING THIS VIDEO IS INTENDED TO MAKE THE PERSON WHO WATCHES IT INSANE, DONT WATCH IT FULLY if you want a general idea watch 18:40 http://www.youtube.com/watch?v=VMGgqbik4d0 |
oh well but you're a liar yourself, aren't you? As I told you before, you should really really consider a break from the internet and go get some fresh air for your own good.
Where did you get your English literature degree btw? Forgive me but I find it hard to believe, considering the way you write in English. |
well i admit im crazy but i was driven so by i dont know who
the proof is the things ive watched on tv which some you can see here im sorry i need to vent off this, bad luck for you we have the same taste in games my degree was centered on feminist literature, i could give you several reasons cause its wrong to be a man |
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something to make me recall, a mind map now from wrttting it all together i can tell how i was lead insane on purpose so i dont do certain thing time travel the ultimate weapon, the world changes continually and you dont even notice, maybe just some dream or dejavu well some dejavu i should say thousand dejavu, some days feel that till i get it all right 30 years passed by |
well i apologize for going so crazy now seriously
i gain access first to the parallax of my eyes this gave me acces to the inner ect muscles of the eyes and this acces to a muscle that goes all in the midel of the head by contracting this brain muscle my eye sight improves so much that even with 8 dioptries i can see nearly perfect i think very soon ill make a thread with a method for healing short sightedness availed by a dr certificate edit: i apologize for the multiposting and the eccentric stuff but im so excited by that contracting this brain muscle im experiening some of the best improvement in my eye sight ever edit: this is totally thrilling im getting to see almost perfectly without glasses IN ARTIFICIAL LIGHT, this is such a massive improvement in my 4 year effort :) edit: this is getting very exciting by contracting this muscle, the front then the back then both parts i am not only seeing almost perfectly without glasses but hear a crack sound where the pineal gland or third eye is seems im increasing irrigation and physically cracking the cqalcification of the pineal that all adults have due to the holy roman empire poisons like fluorine or lead of course i could have a brain failure so ill take it easy :) this is what the pineal gland looks like: http://2.bp.blogspot.com/_IslRZnCaBy...a+vaticano.jpg http://3.bp.blogspot.com/_IslRZnCaBy...-pi%C3%B1a.jpg edit: i just realized this by trying it glases on: if you make your eyes go unfocused while reading something youre actually tensing the fornix the question is why it took me 4 years to do this while everybody here can go the eyes unfocused, that is tensing the fornix at the same time and wtf why that ridicuolous name fornicatix oh god is it posible to speak 3 words without cursing in at least one language from sometime line they even mess up in the same time line like peace on you, theres a terrible fog, hoho its +mats time god i mean if we werent used to it, everythings so bizarre |
I am not familiar with fornicatix. Perhaps its a corruption of Fornicatrix with an "r". In my younger single days I was very familiar with a lot of lovely young women who were technically fornicatrix, not that they saw themselves in that light (or even knew what the word meant).
Raaaid ... you have a knack of digging up interesting obscure stuff, which is why I read your threads, but you tend to then make random jumps to somewhat illogical conclusions, which on rare occasions might be insightful in a lateral thinking way, but usually turn out to be just illogical and random. Illogical and random stuff unsettles some people and on many occasions you seem to deliberately being stirring such people up. As for the eye exercises, a quick google for "eye exercise" brings up dozens of therapies for improving bad eyesight. What makes your one different to the tradition ones ? |
well my objective is gain a total councious control of the eye lens to correct any kind of focusing defect
but seems by accdient i learnt to gain concious control of a muscle inside the brain called the fornix of the brain incidentally by tensing this muscle i get to see perfect with 8 dioptries fro moments i think if i keep at it i might heal my sight over a week maybe now overnight :) |
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Raid...
MONSANTO... |
FFS, don't get him started on MONSANTO... or DUPONT for that matter :rolleyes:
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well my sight is getting better and better and i think i found out whats the function to have a muscle in the brain:
to extract the sith that acumulates in the brain like metals and fluoride i can tell by how theres something inside my brain that crunches when i tense the fornix and by doing exercises with this muscle i dont stop expelling mucus through my nose i recall something i read on the philosophers stone on cracking the philossophical egg |
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What is your point? The "We are becoming gods" part? |
well that was to prove i was lead insane by tv, whats the point of showing me 15 minutes of unrelated roadkill and deformed fetuses
The "Ovum Philosophicum," which can be translated as the Philosophical or Alchemical Egg, is the principal vessel used in alchemical operations. During the alchemical process, the material, Hermetically sealed in the Egg, is put through a symbolic death and rebirth. When the Egg was cracked, a new mystical substance emerged which was an elixir that prolonged life and acted as a catalyst capable of improving any substance that it came in contact with. This substance, called the Philosopher's Stone, could change lead into gold and change an ordinary person into an enlightened master. |
I give up.
Obviously allowing you to infestate this forum with your nonsense, which yourself admitted being trolling, is more important than keeping it a quality place. |
but if this is my only thread in the front page
and im pretty much sure i found a method to heal shortsightedness, wait some weekss |
ok, fine, let's have a bet and see how much of a man you are and if you're a misunderstood genius:
If you can prove that your theory is right and applicable to all of us successfully I'll give you €100. If you can't demonstrate it and fail you'll stop posting all this nonsense once and for all. Now since you're so convinced about your discovery, I can't think you won't like accepting the idea, and believe me I will be more than happy to give you €100 if your "discovery" is right. Your call buddy. |
well i know im right after four years trying i found the way to see well enough though i have 8 dioptries with artificial light
and that is contracting the fornix, a muscle in the brain my theory its the function of the fornix, a muscle in the brain, is to strecth the brain so the calicified incurstions of metals hold off and get eliminated now the point is that some may not like this due to two facts: ALL ADULTS have calcified incrustations in the brain, mainly in the pineal gland fluorine which doesnt heal cavities acumulates the most in pineal which suggests this im doing its highly subversive yet innocent what its discusible is how can i teach someone to learn to use the fronix in the brain, i admit that so i wont take the bet edit: oh and if im right i dont expect to earn 100 bugs but to cause the biggest known revolution |
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the thing is that in this 4 years i got to see pretty good with day light
but now at times i get to see excelenet even with street lamp light, which is absolutly amzing for me also its amzing those crunches coming from the center of my head when i tense and relax the fornix in fact now i think everybody cracks a bit the calcified parts of the brain when yawning so you hear som click sound |
right, so it's back to this one for me (don't think I've ever quoted myself before, how quaint)...
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your missing the GOOD troll thing
The pineal gland is a midline structure shaped like a pine cone,[3] and is often seen in plain skull X-rays, as it is often calcified. http://en.wikipedia.org/wiki/Pineal_gland http://ootgodh.wordpress.com/files/2.../picture-6.png http://secretos-mundiales.info/wp-co...-Sakyamuni.jpg |
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This Troll can be genuinely funny, and really wants to be liked. When there are disagreements it can be quite passive-aggressive, and whining. The Nice Troll is inconsistent and can’t be trusted to stick with anything for very long. This Troll often doesn’t really even appear to know itself all that well. It may not know that it is a Troll! The lack of a solid core to the creature makes it hard to engage solidly. The risk with Nice Trolls is that if too much heat is applied they will win many sympathy votes. The niceness is often genuine. The Nice troll does not like to be shown up for being a Nasty Troll – as that might cause it to suffer rejection, whereas it really just wants to be loved. Sometimes, the Nice Troll is just not sufficiently committed to the Cause, and has yet to fully engage in a more energetic Troll Mode. This type of Troll is a follower not a leader. Give it too much attention and it may get ideas beyond its station. Typically, it may adopt characteristics of the Expert Troll, and at worst, also display some Slime Troll traits. http://hermetic-golden-dawn.blogspot...nt-trolls.html |
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Is the penis a muscle too? Do you know how eyes actually work? Ever dissected one? |
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yeah fornix you noticed
i think thats something that time travellers do, the change yes by no, they go to the moment a word is created and make a curse one... edit: now with some seriousnes i know im not carcking the philosophical egg and getting to be an enlightened master thats just some wild dream i sahre but in this 4 years doing exercises with the eyes i had never had so much instant improvement as i have tensing the fornix before i was forced to use glasses because with artificial light i saw too bad though with sunlight it was all right but now i can see well enough even with street lamp light which is mind blowing :) |
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im shor sighted so my improvement its a long distance
if- when i heal my eyes completely which i expect very soon ill post my old and new prescription so people can benefit from my disocvery about the fornix of the brain utility of cleansing the brain from cal incrsutation by strecthing the brain and phisically removing them :) |
If your Cylinder (astigmatism) has improved allot or worsened. Ask for a perhipheral fields test...
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