Search found 3399 matches

by eSOANEM
Tue Sep 01, 2009 7:56 pm UTC
Forum: Science
Topic: How scientifically accurate is this LHC short film?
Replies: 4
Views: 675

Re: How scientifically accurate is this LHC short film?

I forgot length contraction, thank you EricH. The LHC could accelerate them and steer them in a circle as the metal has a charge induced in it by the magnetic field and so is attracted. The only problem is it would be behind the magnet on/off pulse and so would not be seen cruising alongside protons...
by eSOANEM
Tue Sep 01, 2009 7:03 pm UTC
Forum: Science
Topic: How scientifically accurate is this LHC short film?
Replies: 4
Views: 675

Re: How scientifically accurate is this LHC short film?

a mini black hole wouldn't behave like that. A black hole attracts thing in the same manner as the original object until you are inside the original (pre-collapse) object's radius. And if the black hole was eating the part of the car it would be consuming mass and so at least slowing its decay rate ...
by eSOANEM
Tue Sep 01, 2009 6:35 pm UTC
Forum: Science
Topic: Turbines on Cars
Replies: 20
Views: 1430

Re: Turbines on Cars

it would violate the conservation of energy. Once the car is moving, the turbines can draw some power but even in a 100% efficient system they would still only recover as much energy as they lost due to the drag. In a more realistic well under 100% efficient system it starts losing vast amounts of e...
by eSOANEM
Tue Sep 01, 2009 3:42 pm UTC
Forum: General
Topic: Fun Nerd Projects?
Replies: 19
Views: 2034

Re: Fun Nerd Projects?

CHAINMAIL it's like knitting, but METAL Plus. You might wear off your fingerprints! Anonymity ftw! that's easy to do. I've do it at least once a year. My school runs a trip down to a sailing school on the isle of wight and almost every week (provided we get to go out most of the days) I wear my fin...
by eSOANEM
Tue Sep 01, 2009 1:15 pm UTC
Forum: General
Topic: SKYNET
Replies: 12
Views: 1685

Re: SKYNET

did none of you see TSCC? It's now implemented April 19th 2011 and launches its attack April 21st.

I will make sure I am safely in the middle of the ocean that day.

Oh and scarily, Britain's gone and got a military comms satellite system called skynet. (BTW I am British)
by eSOANEM
Tue Sep 01, 2009 1:00 pm UTC
Forum: Science
Topic: A 4th Dimension
Replies: 39
Views: 3733

Re: A 4th Dimension

This is as good of a place as any to ask ... the other day I was watching a fairly serious program on dimensions and relativity, etc. They *kept* referring to how we live in a 3-dimensional world (then they went on about the possibilities of more dimensions). Here is my question: I thought it was c...
by eSOANEM
Mon Aug 31, 2009 7:19 am UTC
Forum: School
Topic: Ways to keep busy in a boring class
Replies: 124
Views: 11737

Re: Ways to keep busy in a boring class

didn't you read the last bit I said?

Then I have to go and prove the Mclauren series does equal eix.
by eSOANEM
Mon Aug 31, 2009 7:09 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2861
Views: 566327

Re: RELATIVITY QUESTIONS! (and other common queries)

if we were to use a single electron as the black hole (or a collection of electrons) (or other charged massive elementary particle) and accelerate it as I mentioned (feeding it more electrons all the time to prevent evaporation) surely their would be a minimum size for the lump of electrons and so t...
by eSOANEM
Mon Aug 31, 2009 7:05 am UTC
Forum: Science
Topic: Faster Than Light Theory
Replies: 18
Views: 1167

Re: Faster Than Light Theory

if you're in space then not only is it likely to be dark but they're also likely to be quite far away from you and so quite small. If they're inteligent they'll also have directed their thrust away from you or taken other such measures.
by eSOANEM
Mon Aug 31, 2009 7:01 am UTC
Forum: Science
Topic: A 4th Dimension
Replies: 39
Views: 3733

Re: A 4th Dimension

Thank you, yes that is the theory. I'd forgotten all the problems with it but it is still a very interesting and relevvant idea, even if a very very flawed one.
by eSOANEM
Sun Aug 30, 2009 8:33 pm UTC
Forum: Science
Topic: Faster Than Light Theory
Replies: 18
Views: 1167

Re: Faster Than Light Theory

We might not want to use lasers because if we were in a battle, a laser, being an active sensor would give away your position whereas a gravity sensor, being passive could "see" the enemy without giving away the user's position.
by eSOANEM
Sun Aug 30, 2009 4:45 pm UTC
Forum: Science
Topic: A 4th Dimension
Replies: 39
Views: 3733

Re: A 4th Dimension

I was reading a very interesting book by Michio Kaku quite recently that talked about this. There was a physicist (can't remember the name and the book's at home (I'm at my Gran's) but the page is marked) who tried expanding Einstein's field equations into four spatial dimensions and ended up findin...
by eSOANEM
Sun Aug 30, 2009 4:34 pm UTC
Forum: Mathematics
Topic: help with Knuth's up arrow notation
Replies: 15
Views: 2194

Re: help with Knuth's up arrow notation

ah OK. I obviously didn't read it very carefully.

Thank you very much and I can see why that would cause problems.
by eSOANEM
Sun Aug 30, 2009 7:29 am UTC
Forum: School
Topic: Ways to keep busy in a boring class
Replies: 124
Views: 11737

Re: Ways to keep busy in a boring class

Can't people just do something "normal" like solving sudoku or something? but that would be boring. :P And I could never remember to carry enough sudoku with me. Also I find sudoku terribly boring, its probably because I do a nice methodical approach that takes a while but is guaranteed t...
by eSOANEM
Sun Aug 30, 2009 7:08 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2861
Views: 566327

Re: RELATIVITY QUESTIONS! (and other common queries)

strange one here. Does the Schwarzchild radius of an object depend on the total mass including any gained from motion or equivalent mass from the object itself or does it depend on the rest mass. This question arises because reading another thread I had the idea of accelerating a charged object unti...
by eSOANEM
Sun Aug 30, 2009 6:59 am UTC
Forum: Science
Topic: Does light exert gravity?
Replies: 69
Views: 5963

Re: Does light exert gravity?

I assume we are talking about a pair of objects that have non-zero rest mass. Actually, in GR there is no gravitational attraction Ok, fine, their inertia will carry them closer together. And yes they do have non-zero rest mass. If they didn't they'd have to move at C as soon as they were given any...
by eSOANEM
Sun Aug 30, 2009 6:45 am UTC
Forum: Mathematics
Topic: help with Knuth's up arrow notation
Replies: 15
Views: 2194

Re: help with Knuth's up arrow notation

sorry, I'm not entirely sure what you meant by an operator being cumulative. Wikipedia couldn't explain it to me so could you please.
by eSOANEM
Sun Aug 30, 2009 6:31 am UTC
Forum: Science
Topic: Faster Than Light Theory
Replies: 18
Views: 1167

Re: Faster Than Light Theory

Gravity is "just there" in the sense that electromagnetism is "just there". Both appear to transmit instantly at our (quite small when talking about the speed of transmission of forces) human scale. Neither of these forces do transmit information or energy instantly however, it i...
by eSOANEM
Sun Aug 30, 2009 6:24 am UTC
Forum: Science
Topic: What Parts of Math Help With Physics?
Replies: 13
Views: 1207

Re: What Parts of Math Help With Physics?

It depends entirely on what level and what field you are studying. As dedalus said, at research level (and even bellow) quantum mechanics needs pretty much everything. One of my dad's lecturer's for his maths degree was a physicist who was trying to prove the Riemann hypothesis because he had found ...
by eSOANEM
Sat Aug 29, 2009 1:38 pm UTC
Forum: General
Topic: Fun Nerd Projects?
Replies: 19
Views: 2034

Re: Fun Nerd Projects?

do what my friend did, mod your calculator. He took the back of the case and the reflector on the screen off so he can see through it. He then glued some white card to the cover so that if he has that it works like the normal reflector. Lastly he installed a backlight. he's currently in the process ...
by eSOANEM
Sat Aug 29, 2009 1:30 pm UTC
Forum: School
Topic: Ways to keep busy in a boring class
Replies: 124
Views: 11737

Re: Ways to keep busy in a boring class

Teach myself calculus. [snip] Read the textbook, and look for errors. Make note of them to point out to the teacher later. [snip] Pick an argument with the teacher over a tiny point that I know a lot about and disagree with them over. [snip] Derive equations, like the parachute equations for rocket...
by eSOANEM
Sat Aug 29, 2009 1:20 pm UTC
Forum: Science
Topic: Does light exert gravity?
Replies: 69
Views: 5963

Re: Does light exert gravity?

the parralel course photons is an interesting case. If we were to have two particles travelling arbitrarily close to C it become quite simple. The two particles observe the other to be stationary and so will gravitate towards each other exactly as if the were statioanry (because they are). Of course...
by eSOANEM
Sat Aug 29, 2009 8:07 am UTC
Forum: Science
Topic: Does light exert gravity?
Replies: 69
Views: 5963

Re: Does light exert gravity?

Why, of course photons have mass. They do not have rest mass, but they do have mass when they move. (And, well, they always move, of course) Only equivalent mass from the energy they transfer. Other than this equivalent mass from energy, the photon has no mass as the relativistic mass (excluding eq...
by eSOANEM
Sat Aug 29, 2009 7:43 am UTC
Forum: Mathematics
Topic: help with Knuth's up arrow notation
Replies: 15
Views: 2194

Re: help with Knuth's up arrow notation

OK, thanks for the help. All this arose from me fiddling around with the up arrow notation and getting annoyed because it takes a long time to write it out if you want to do the full number of arrows and a single up arrow with a superscript number saying how many arrows there are not only makes it l...
by eSOANEM
Fri Aug 28, 2009 1:40 pm UTC
Forum: Mathematics
Topic: help with Knuth's up arrow notation
Replies: 15
Views: 2194

help with Knuth's up arrow notation

does anyone know if there is a rule for calculating the value of an expression of two given natural numbers with a number of up arrows equal to x. That is, is there a formula for calculating the value of [natural number][x number of up arrows][natural number] in terms of x? Currently I'm at secondar...
by eSOANEM
Fri Aug 28, 2009 1:28 pm UTC
Forum: Science
Topic: Does light exert gravity?
Replies: 69
Views: 5963

Re: Does light exert gravity?

yes light does as gravitation is caused by mass/energy. Photons may not have mass but they do transfer energy and thus bend spacetime causing gravitation.
by eSOANEM
Fri Aug 28, 2009 10:32 am UTC
Forum: School
Topic: Ways to keep busy in a boring class
Replies: 124
Views: 11737

Re: Ways to keep busy in a boring class

I also am trying to make a decent proof that e^iπ=-1. I started with an assumption of Euler's law (not sure if that's the right name but it was one of Euler's) (e^ix=cosx+isinx) and am currently in the process of proving that. I've got to prove that the taylor series give e^x. Once I've done that I...
by eSOANEM
Thu Aug 27, 2009 2:01 pm UTC
Forum: School
Topic: The US college and HS system - explain it for me
Replies: 23
Views: 2339

Re: The US college and HS system - explain it for me

in England we also have honours degrees. Most of the good unis give honours degrees by default and then give a 'pass' degree if someone just scrapes through. Less good unis do the opposite giving degrees by default and honours degrees for the very best.
by eSOANEM
Thu Aug 27, 2009 1:59 pm UTC
Forum: School
Topic: Awesome Student Quotes
Replies: 861
Views: 152373

Re: Awesome Student Quotes

The royal families were famously incestuous. All the families were all related to each other (perfectly reasonable) but then they still insisted on only marrying other European Royals. Granted it's not as closely related as the pharoahs though. Also, going back to Egypt, in a very well cited article...
by eSOANEM
Thu Aug 27, 2009 12:40 pm UTC
Forum: School
Topic: Awesome Student Quotes
Replies: 861
Views: 152373

Re: Awesome Student Quotes

well there is that but it wasn't completely taboo there. And of course there's all the notorious going-ons of the Victorian era European monarchs.
by eSOANEM
Thu Aug 27, 2009 9:55 am UTC
Forum: School
Topic: Awesome Student Quotes
Replies: 861
Views: 152373

Re: Awesome Student Quotes

Midnight, had your teacher ever heard of ancient egypt?

I can't remember any other examples but I'm pretty certain there are some fairly prominent historical figures who agreed with shawn.
by eSOANEM
Thu Aug 27, 2009 9:49 am UTC
Forum: School
Topic: Ways to keep busy in a boring class
Replies: 124
Views: 11737

Re: Ways to keep busy in a boring class

I take pens apart and put them together, occassionaly I do this with otehr people's pens that i've taken without permission but with every intention of returning, one piece at a time. I also am trying to make a decent proof that e^iπ=-1. I started with an assumption of Euler's law (not sure if that'...
by eSOANEM
Thu Aug 27, 2009 8:17 am UTC
Forum: School
Topic: GSCE results aftermath
Replies: 12
Views: 1332

Re: GSCE results aftermath

I'm in yr10 so I've just got my first set of sci modules (a few people stopped my class doing maths early). My results were only meant to be online at 10.00 but were up early. Anyway 3 A* modules and, as I've already got 3 A* practical exams (forgotten the name) I 'm guaranteed 1 A* (best module sco...
by eSOANEM
Thu Aug 27, 2009 7:49 am UTC
Forum: School
Topic: The US college and HS system - explain it for me
Replies: 23
Views: 2339

Re: The US college and HS system - explain it for me

As no one else has done it yet, I thought I'd attempt to explain the English system (not the British system, the Scots, Welsh and Northern Irish have different systems and I have absolutely no idea what the system is in the Republic of Ireland) First of all you get many nurseries which aren't state ...
by eSOANEM
Wed Apr 15, 2009 9:52 pm UTC
Forum: Science
Topic: my musings on tachyons.
Replies: 3
Views: 665

my musings on tachyons.

I was bored on a school trip last week and was musing on tachyons when I came up with this idea about how they clearly violate all laws of reasonability. Now I am aware that it is commonly stated that a tachyons moves backwards in time, why is this? Because by my calculations (see below) the movemen...
by eSOANEM
Mon Apr 13, 2009 12:33 pm UTC
Forum: School
Topic: Assassin
Replies: 56
Views: 7448

Re: Assassin

we did it at my school with clothes pegs. Each player got given a teach to "peg" the first x people to get their teacher went through to the next round. The winner got some chocolate and the sign-up money went to charity.
by eSOANEM
Mon Apr 13, 2009 12:21 pm UTC
Forum: School
Topic: Worst/Most Confusing Test Questions
Replies: 53
Views: 5241

Re: Worst/Most Confusing Test Questions

In physics we were doing a revision test (we were allowed to talk to other people in the class) and I was sitting at the front with the other nerds when we came across the following question: in what form is energy in the flash of a lightning bolt transfered? a) by one particle hitting the one next ...
by eSOANEM
Mon Apr 13, 2009 12:13 pm UTC
Forum: School
Topic: Awesome Teacher Quotes
Replies: 1762
Views: 324967

Re: Awesome Teacher Quotes

Also, whilst not a quote but more of an anecdote I thought it was still relevant. It was in physics and the test had just started. I was sitting next to my friend (between us we tend to get the top two scores in the class). Then, completely unexplained, the teacher brought out two retort stands and...
by eSOANEM
Mon Apr 13, 2009 8:14 am UTC
Forum: School
Topic: Awesome Teacher Quotes
Replies: 1762
Views: 324967

Re: Awesome Teacher Quotes

This is from a chemistry teacher on a school trip to the Isle of Wight (IoW), we were sailing. "It's not that much to look at when you first get it out on the bed, but then you slide it out and you think: how does this beauty work?" The best thing is that none of the younger pupils on the ...

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