Paper Definition and 999 Threads

OK well as the title says I have to do an egg drop using only a foot of tape, 3 sheets of computer paper, and 2 straws (they have the bendable end). So is there any suggestion of what will work best? The egg will be dropped from 10cm to begin with, and then the drop height will increase until it...

I'm hoping there will be some comment on this new paper of Kirill Krasnov http://arxiv.org/abs/1101.4788 Gravity as a diffeomorphism invariant gauge theory Kirill Krasnov 24 pages (Submitted on 25 Jan 2011) "A general diffeomorphism invariant SU(2) gauge theory is a gravity theory with two...

Hi Everybody :) Recently I have been thinking on the concept of reusing paper instead of recycling it by using a special kind of photo-chromic ink, as chemistry is not my profession ia m writing here just to have your opinions about viability of this concept: what is the concept about...

They can only be carbon-neutral or better if sustainably harvested, of course. And only if the lumbar companies plant trees after they fall them. But if these assumptions hold (which I believe they do in many regions of the U.S.), then cutting down trees helps sequester carbon. Trees grow...

Inverting amplifer question http://img210.imageshack.us/i/electronicsquestionsq30.jpg/ Can do part a) ! Vout/ Vin = -R2 / R1 and found part d) in a book, that closed loop gain is less but more linear and am able to draw the graph. Any help with b) c) e) f) would be great, particulary...

Hi, I'm writing an assignment for school and there is a paper on springerlink which looks like it could be of help to me, the site wants me to pay $45 for the single article but I think that for subscribers it is free. So I was wondering if anyone who is already a subscriber is willing to...

Im doing a review of a scientific paper about steroid use in baseball and its effects, but am struggling to understand a section. (paper is "On the potential of a chemical Bonds: Possible effects of steroids on home run production in baseball") "It is therefore reasonable to assume that a...

The concept of the game: You are presented with the titles of two papers. One paper is a real one posted at the arXiv. The other is fake, with the title automatically generated using a context-free grammar. Your job: Guess which is the real paper. After guessing you will be presented with...

Of these fifteen candidates, please select the paper or papers which you think will contribute most significantly to future quantum gravity research. Multiple choice is possible in the poll, so please choose several if you wish. The papers' abstract summaries follow in the next post. Big Bounce...

what title say, how?

Hello everyone. I have been looking for a book or any article where I can get a good description about classical theory of energy transfer from electromagnetic field to a particle. I am particularly interested in how much work is done by the field when it interacts with the partciel (for...

Penrose and Gurzadyan are not giving up without a fight. They posted a second paper today, answering their critics: http://arxiv.org/abs/1012.1486 More on the low variance circles in CMB sky V.G.Gurzadyan, R.Penrose 2 pages (Submitted on 7 Dec 2010) "Two groups [3,4] have confirmed the...

Hi I want, once and for all, to abolish pencil and paper in my studies. At least in what concern mathematics. I mean, I want to do my "pencil and paper calculations" electronically. Note that I'm not talking about using any computer algebra system. The problem is that I haven't found...

Thank you Marcus for spotting this paper. Fotini Markopoulou takes a non reductionist view of Planckian physics in this latest writing, where more fundamental physics doesn't have to be more or less simpler than the physics emerging from it. This line of thinking remind me P.W. Anderson's...

This is a bit of a silly question, but one I'm curious about ... It all started when I made a status update on facebook proclaiming that if you could fold a piece of A4 paper in half 44 times it would reach the moon. One of the commenters made an interesting point by saying: I...

Didn't really know what board to put this post on, but anyway... After finishing a 10 day lab project, I'm expected to produce a 2 (possibly 3) page conference paper about it. Having never written a conference paper before I'm not too sure what to include and what not to... I have...

I have to write at 15 page long research paper on an engineering disaster. So far i have thought about doing the boston molasses disaster, anyone of a hundred bridge collapses, or plane crashes. Can anyone give some good suggestions for an engineering disaster? Something that is really well...

I am having difficulty working out one of the steps in Einstein's original SR paper, in the Section entitled "Dynamics of the Slowly Accelerated Electron". Einstein describes an electron in motion in an electromagnetic field. Its equation of motion in a rest frame K (not moving with the...

I request you all to perform this activity now (it will take less than a minute)- 1)Take a rectangular piece of paper. 2)Make two holes of the size or your fore-finger in it - equidistant from the edges (refer the figure attached. 3)Insert the fore-fingers of your two hands in the holes...

Question on Witten's paper: "Perturbative Gauge Theory As A String Theory..." Hi guys, I have a question regarding formula 2.12 of Witten's paper hep-th/0312171 "Perturbative Gauge Theory As A String Theory In Twistor Space". He just states this formula but i don't really understand his...

http://www.newscientist.com/article/dn19712-is-this-evidence-that-we-can-see-the-future.html This is an unfinished version of the paper: http://dbem.ws/FeelingFuture.pdf

Hey guys, I am in dire need of help. In physics today, my professor gave us an experiment. It involved a strip of paper towel with dots along it from a sharp. it was hung from a metal ring stand and the edge of the paper towel was immersed into a dish of water. Water traveled up the paper towel...

I am writing a article in my university newspaper, and I am just gathering as much info as I can about chernobyl, now and then. ***EDIT*** OK, got some good info, so I am changing my post here. Im trying to come up with a really good intro, but I don't like what i came up and want something...

Do these two answers contradict each other: Q1) Four students are discussing a circuit. The circuit is in series and contains a lamp, an ammeter and a 10V battery. Andy: the current in the lamp consists of negative charges moving from the negative batter terminal towards the positive...

I am sorry I don't speak English well. I have to make wigner-seitz cell-BCC, FCC- by using paper likewise regular solids origami(?). So I need development figure(planer figure). (ex : ) If you have it, please send me. Please forgive me my English skills TT

Im don't even know where to start, theses questions, it doesn't seem to link to anything I've learned or any equations. So here we go. 1a) show that about 78,000 J are required to move 28 grams of notrogen molecules (one mole) from the surface of the moon to a point far away from the surface...

Hey guys, sorry if I put this in the wrong section. Basically here's the thing, I have to do a research paper for my English class, and it is to be science related. That's all fine and dandy, but the thing is, the prof. said that the topic should have two sides to it, basically an argument to...

http://arxiv.org/abs/1010.4312 This is the actual paper that was published yesterday in Nature magazine. Good show ESO! Galaxy is now 3.1 billion years old. The baby picture that European Southern took of it is when the universe had been expanding for only 600 million years.

http://arxiv.org/abs/1010.2979 Octonions Jonathan Hackett, Louis Kauffman 11 pages, 11 figures (Submitted on 14 Oct 2010) "In this paper we review the topological model for the quaternions based upon the Dirac string trick. We then extend this model, to create a model for the octonions -...

Repeatedly Rovelli posts papers that are not boring. This one shows a lot of progress towards the GR limit and also a Feynman-style presentation with what I think is wide appeal But first, there is this Russian filmmaker Ilya Khrzhanovsky http://en.wikipedia.org/wiki/Ilya_Khrzhanovsky who is...

Can someone edit my paper on g-force. I just need you to look for proper terminology usage and if anything needs clearing up. Also if you have any suggestions it'll be greatly appreciated http://rapidshare.com/files/424446844/Math_IA.docx

Anyone can help me to download this journal paper? URGENT ><~~ Dear friend, I am looking for this journal paper. Unfortunately my institution does not subscribe this. Can anyone here please kindly help me to get this? I really appreciate to get your help, this journal is really important for me...

Of these twelve candidates, please select the paper or papers which you think will contribute most significantly to future quantum gravity research. Multiple choice is possible in the poll, so please choose several if you wish. Tennie Wohlfarth Consistent matter couplings for Plebanski gravity...

Hey everyone, I have a paper due for a class and I was wondering if anyone here who is a practicing or who has practiced as an electrical engineer or something related could answer a few questions for me. Also, I will just need to put your name and work history down on my paper. Thanks...

Paper bridge project ! hi i have a paper bridge project coming up and need some help making a design that will hold the most. the rules are the bridge has to made with one sheet of lined paper and no adhesives are aloud including tape and glue. the bridge needs to span 12 cms and hold as much...

An interesting paper just appeared on arxiv today. http://arxiv.org/abs/1009.3741 Identifying the Inflaton Damien A. Easson, Brian A. Powell 5 pages, 2 figures (Submitted on 20 Sep 2010) "We explore the ability of experimental physics to uncover the underlying structure of the...

Hi, I'm working my way through Schwinger's paper (http://www.physics.princeton.edu/~mcdonald/examples/QED/schwinger_pr_82_664_51.pdf" ) and I came across the following identity -(\gamma\pi)^2 = \pi_{\mu}^2 - \frac{1}{2}e\sigma_{\mu\nu}F^{\mu\nu} where \pi_{\mu} = p_{\mu} - eA_{\mu}...

This paper by 't Hooft looks interesting, I would like to hear some thoughts and comments !. http://arxiv.org/abs/1009.0669 Probing the small distance structure of canonical quantum gravity using the conformal group Authors: Gerard 't Hooft (Submitted on 3 Sep 2010) Abstract: In canonical...

How on Earth can a piece of paper stand vertically on a single corner!? Last week when I woke up, I saw something very interesting in my apartment. A piece of paper, torn from a newspaper previously, was standing still in an equilibrium on the floor, on a single corner. I was surprised and...

Suppose I have to pick one review paper on the observational status of astrophysical black holes. It should: -be as up to date as possible -be available for free online (preferably on arxiv) -cover both supermassive and solar-mass black holes Does anyone have any suggestions? This one...

Imagine there is a piece of paper negative mass simply pushes up while mass pushes down doesn't that mean that a black hole would be created by mass and negative be same a rip in the paper or in other words space ps I am not very advanced in physics so don't flame me and try to keep your...

This is a homework assignment, thus the category, although it may not look like many of the other posts in this part of the forum. My assignment is to write a paper about Cern. I'd like to answer the following questions: Main question: How will Cern alter our understanding of the universe and...

Hi When you burn paper dipped in ethanol why doesn't the paper catch fire? I would have thought that the energy released from the ethanol combustion would raise the temperature of the paper to its ignition point? thanks

Say I pierce a paper Mobius strip with a pin and call the point on the side the pin entered the paper the point A and call the point where the pin comes through the paper the point B. In an idealized Mobius strip are these points different? Can they be the same? I would like a closed surface...

Dear all, Here are some questions about explaining symbols in a journal paper. a) Do you explain every symbol in the equations? For instance, when you write down Maxwell's equations in a journal paper, do you, after the equations say "where \vec{E} denotes the electric field, \vec{H}...

Hi I was wondering why wet paper doesn't burn and I believe its something to do with the ignition point [The minimum temperature at which a substance will continue to burn without additional application of external heat. Also called kindling point.] Is it simply because when paper is...

White holes and eternal black holes Stephen D.H. Hsu http://arxiv.org/abs/1007.2934 I though this was very interesting, and partially cleared up some of the confusion I'd had about this topic in the past. The introductory section is very nontechnical and accessible. One thing that wasn't...

New Barrow paper - "A New Solution of The Cosmological Constant Problems" http://arxiv.org/abs/1007.3086 Anyone care to comment? I haven't taken too careful of a look yet, because it is late, but I'll try to write a response to it tomorrow.

http://arxiv.org/abs/1007.1317 Black holes in an asymptotically safe gravity theory with higher derivatives Yi-Fu Cai, Damien A. Easson 22 pages, 3 figures (Submitted on 8 Jul 2010) "We present a class of spherically symmetric vacuum solutions to an asymptotically safe theory of gravity...

A friend asked me for an interesting way to destroy a boxful of flashcards for a video scholarship. Being almost the 4th of July, I mentioned making some kind of fireworks out of them, but I want to give him something a little more... safe and legal. I tried looking on Google for chemical...