grifter

ecoli has stumbled, erm (I mean carefully found his way to) a good point perhaps these questions simply can't be answered by us mere mortals, on that note I think we should move on from this topic of discussion...

insane_alien is defiantly speaking from my corner of the ring, even though this article is sensationalizing the argument, it still is startling, that a civilized nation (so speaking) is allowing this [insert profanity] to become state law. What is becoming of this world around us, political correctness has gotten way out of control...

I nominate that we have a user awards before anyone else is nominated for a so-far non-existent competition...

bump

The amount of energy it takes to significantly "heat" anything is relatively large, very loud noises will cause a very slight increase in temperature, but the sound "waves" travel in all directions, not one direct "beam" therefore the heating is spread among a very large "region". This heating effect would definitely be classed as negligible in most normal situations. Hope this helps.

Okay I've been here a while now but I thought I should introduce myself and give you the low down I am a student studying Physics, my particular interests are Astrophysics, particle physics and most other areas, I am also Studying Chemistry. My Hobie's include: Sailing Fencing Rugby Skiing (when theres snow....obviously) and so much more... anyway, love the Forums and thanks for letting weirdos like me contribute:D :D

Since I've been here a matter of weeks theres no hope of me winning either, unless there's an award for something obscure like, best Grifter, then I suppose I'd win...

no this is an "open Book" exam that lasts a week, thousands of students take it, chances are; a good few people came across it, the exams for this course are pretty soon, good luck everyone ...

we should enforce a mandatory disclaimer policy on all posts, I'm going to add one to my signature right now The above post is not necessarily representative of Grifter's views, any views expressed in this message may be inaccurate and/or incorrect. The above mentioned is not responsible for any actions that may occur as a direct or indirect result of reading the above post

lol that would help allot, thanks I'm trying to learn LaTeX at the moment, not going to badly

but you can travel to a point where the earths gravitational potential will become small enough so that it can be "ignored" (this coupled with the gp of other bodies i.e. the sun...) for example (corrent me if my calculations are wrong) the gravity @ a radius from the centre of the earth: 2.02x10^7 F= (G x M1 x M2)/r2 Rearrange to get: g= (G Mearth)/r2 As gravity is the force acting on 1kg: M2 = 1kg Radius of orbit ® = 2.02x10^7 G = gravitational constant = 6.67300 × 10^-11 m3 kg-1 s-2 M1 = mass of earth ~ 5.97 x 10^24 g= ((6.67 x 10^-11) x (5.97 x 10^24))/2.02 x 10^7 g=0.975882266 as you can see, with larger values for radius this figure will become smaller and smaller untill it is ~0

sorry about the double post but i got carried away and just had to see if i could find a "cheap" way of sending something at least close to "space" and I came up with this: http://www.innovatia.com/tempest.htm for the nominal price of only $45,000 US yes thats right only $45,000 US you too can be the proud owner of a Tempest Sounder, now comes with a free FAA launch license, sales pitch over, but to be honest thats not too bad a price if someone was crazy enough to do it.

I'm just checking to make sure you guys all got the hint of sarcasm in my last post, this guy is either "joking" or has a serious lack of basic physics. (or both...)

Thanks, after your explanation that makes sense, (excuse my poor question).

it certainly does

With ever improving engine systems of Rockets, it is now possible to propel large payloads in to space, I've heard a couple of ideas being flung arround about transporting "sections" of space craft in to space and assembling there, making one Huge "space ship" capable of transporting colonies of people in a sustainable state to other habitable areas: this idea in theory is great BUT: 1:/ There are (at present, known to us) no areas worth sending people to. 2:/ Due to the long journeys chances are people will DIE therefore making it nescesarry to reproduce, not the most practicle thing to do in space... feel free to add to this list, it could go on forever, it will take HUGE advances in technology before we can realisticly sucseed in colonising other planets let alone traveling to other solar system etc etc etc

since this thread started with accretion disc's i thought i should post a bit of interesting information that i found today, (since this thread has gone a touch "off topic" The intense gravitational gradient (that occurs at the Active galactic nucleus and quasars) is great enough to cause) intense frictional heating; the accretion disc of a black hole becomes hot enough to emit x-rays (but only just outside of the event horizon). The huge luminosity of quasars is believed to be a result of gas being accreted by said supermassive black holes. This process is capable of converting about 10 percent of the mass of an object into energy (allot better than the 0.5 percent for the nuclear fusion processes). I just wonder if once we've beaten nuclear fusion in to submission will the human race attempt to master some of the more yielding methods of transforming mass to energy...thoughts please

yea it was pretty awsome, it was on the aplication of medicine in space, (amongst other things) it was really interesting, especialy seeing the designs of some new Nassa projects based arround principals first made famous in Sci Fi films for artificial gravity, wierd!

Instead of just ringing the bark try: adding a new ring, try a ring of suitable mailable explosive i.e. C4, it would be really discrete, it would be as if the tree never existed... unless you used a really silly small ring in which case you'd just cut the tree down. out of interest what is the diameter of the trunk....

is you calin me dum loike ? No really... I was attempting to make it a bit simpler, since this Mr Jones finds it difficult to grasp the basic principals of reflection I thought introducing photon energy and particle interaction might fry his brain. but, i myself would like some explanation on how virtual electron/positron pairs interact, as I have only a basic understanding... I guess its cool to ask about that in this thread or would it be better to start another thread...

building a "lifter" is a touch out of my league, but i'm finding researching it really intresting, it appears that there are many different methods of obtaining the same effect, the most convinient being the "Biefeld-Brown effect” if anyone fancies further reading check out: http://jnaudin.free.fr/lifters/files/ElectrograviticsElectrokineticsValone.pdf

you always seem to win your own challenges, is this because your just too good at experimental science

yea it certainly would be!!! and this challenge should be repeated for this year I'm bored and it will be a good way to cook food without having to turn on the oven. Did anyone bother to take part three years ago???

I'm gunna go for a parabolic cooker design, so I'd better find a hell of a big satellite dish, I'm gunna ring S.E.T.I. see if they've got any spares.......

I like this "Aviv8", I'm a man after his heart, I too want to send something, at least out of our atmosphere, but I'm guessing it'll take me about a week worth of work, I have made some calculations and have found that with the combined financing power of Aviv8 and me (ruffly £10 and some Gum) we could buy a cardboard tube, a couple of heat resistant tiles (for re-entry), a bit of black powder and a few matches to light that all important black powder. Oh and I also like Cap'n Refsmmat's idea of a Saturn v design, i think ill try that. Now, where's my calculator...