Strings Definition and 523 Threads

Homework Statement Two identical violin strings, when in tune and stretched with the same tension, have a fundamental frequency of 440 Hz. One of the strings is retuned by adjusting its tension. When this is done, 2 beats per second are heard when both strings are plucked simultaneously. a...

hello can some one explain this in details thank u a- How many bit strings of length seven either begin with two 0’s or end with three 1’s? ] b- How many bit strings of length 10 contain either five consecutive 0’s or five consecutive

The problem with bosonic strings is the fact that they contain a tachyon. Why that is not a problem for the bosonic part of heterotic strings?

Hello there, I am filming a documentary on cutting-edge physics, and I was wondering what constitutes a "professionally researched theory." What is it about ST and LQG that make them "professionally researched?" Are there other non-profesionally researched theories out there? Thanks...

If strings or membranes are the most fundamental entity that cannot be divided further, where do these "particles" begin? Subatomic particles such as electrons, protons, and neutrons can be further divided into quarks, fermions, leptons, gluons, bosons, ect. Do particle physicists believe that...

Hello everyone. I'm not sure if I'm doing this right or not. The problem asks: Consdier the set of all strings of a's, b's, and c's. a. make a list of all of these strings of lengths zero, one, two, and three that do not contain the pattern aa. Okay so i have the following: note e: stands...

Hi I have a question about pulses in a wire. If I have a single wire of length X and I send a pulse through the wire, when the pulse gets to the end of the wire, does it reflect back with the opposite phase or in phase when the original pulse? I'm trying to visually compare the behavior with...

Polchinski: "2006, the Year in Strings" Joseph Polchinski gave a well attended plenary lecture titled: Polchinski: "2006, the Year in Strings" http://www.phys.hawaii.edu/indico/contributionDisplay.py?contribId=746&sessionId=25&confId=3 The above link gives the slides. I found...

i need a make a program that prompts the user to enter a string, and for it to identify the uppercase characters and replace each uppercase char with the corresponding lowercase character. it also needs to count the character here's what i have so far: #include<stdio.h>...

For homework, I was given the following problem: A .5kg hangs from two strings at the angles shown. The longer string is .5m long. (a) Determine the tension in each string. (see attachment for diagram)Can you tell me how this looks... 1st I broke everything into x and y components (ie Tlx...

how to convert an input of integer(more than 1 character) type into output which is in string in c++

AB is a uniform bar of length 5m and weighs 60N. It is supported in a horizontal position by two vertical strings P and Q. P is 0.5m from A and Q is 1.5m from B. (a) What are the tensions in the strings? (Ans= 20N and 40N) (b) What weight must be applied to A if the tensions in the...

I am sure most of you have noticed how convenient the English keyboard becomes when using it to label 26 and 10 dimensional spaces: there is 26 alphabetical characters, and 10 numerical ones. I feel ready to discard the ten numerical chars as mere coincidence, but I am not so sure about the...

Three objects with masses m1 = 7.0 kg, m2 = 10.0 kg, and m3 = 14.0 kg, respectively, are attached by strings over frictionless pulleys, as indicated in Figure P5.32. The horizontal surface is frictionless and the system is released from rest. Using energy concepts, find the speed of m3 after it...

This morning an odd thought struck me: Is it possible to consider closed (oriented) strings which are entangled into each other in target space (like two rings of a chain)? Due to the topologic properties of this construction the structure should be stable, since both strings cannot interact...

strings as preons: does string theory allow muons to decay directly into e- + photon, given that the only difference between an electron and a muon, in string theory, is the string's tension? Of course, that's not how muons decay, (they decay into a W- boson, which decays into an electron and...

Three objects are connected by light strings as shown in Figure P4.62. The string connecting the m1 = 6.00 kg mass and the m2 = 4.80 kg mass passes over a light frictionless pulley. (b) Determine the tension in the two strings. string between m2 and the 3.00 kg mass I was able to do the...

I'm having trouble on this problem: A weight of 21 kg is suspended by means of three strings T1,T2,T3. T1 and two are connected to a ceiling and meet at their end. T3 connects at the joint section of T2 and T3. All that you are given is the angles of T1 & T2 and the weight of the object. How...

I am ashamed that no one of the textbooks on string theory take care to refer to the Leech lattice or to its (n+1,1) kin, even if only of a footnote when they use selfdual lorentzian lattices. I wonder if it is ignorance or intentional misinformation. Because the singularity of the (25,1)...

if a standing wave is a wave which transfers no energy, how is it that a guitar string produces a sound? because it produces it via a standing wave, and the sound is sound energy, so where does the energy come from?

It's been awhile since I've had physics I, so this problem is giving me a headache. Q) Two very small conducting spheres, each of a mass 1.0 \times 10^{-4}\,\,(kg) , are suspended at a common point by very thin nonconducting threads of a length 0.2 \,\,(m) . A charge Q is placed on each...

ok...I'm a dummy. been doing some novice reading on string theory lately. couple questions: are strings in 'empty space'? and if so, is this how the gravitational pull of a body is exerted on another body...thru the interaction of strings in-between? thanks.

Hi there- I've been trying to solve this problem for the last hour, and I still feel stuck! So far, I've only seen problems with equal angles between the strings and the horizontal- I have no idea how to solve a problem when there's two different angles! A 45-N lithograph is supported by two...

Hello everyone , I'm new in this forum . I'm 16 and currently doing self study in Mechanics 3 . I've encounter a problem in the 2nd chapter of Mechanics 3 which is Elastic Springs and Strings . Here goes : A ball of mass 0.5kg is attached to one end of a cord of unstretched length 0.6m...

The schedule of talks has been posted by the Beijing organizers http://strings06.itp.ac.cn/schedule5.pdf For more information: http://strings06.itp.ac.cn/

Hi, I'm scanning a code from each box to compare and see if the box scanned is a "good" box. The whole code is about 21 bytes and I only want to compare 9 bytes since those 9 bytes differentiate between the 2 types of box. I created (2) 9-byte strings in DB98, string1[9] starts at 0.0 and...

Could the members here please peacefully discuss this topic including the good and bad parts of it. So, strings are simply small waves of energy? Is there something more to this?

How do they make them so that these exquisite notes come from them, i mean they are flimsy bits of wood and tensioned strings, is there a (science) behind it ?

When I was first told that strings were able to see Einstein equations I thought, "what is the deal?". The Riemann Curvature Tensor is a two dimensional object, nothing rare you capture it by using two dimensional objects. It is well known so it is not rare that high level books do not mention...

this just appeared today http://arxiv.org/abs/gr-qc/0605087 Quantization of strings and branes coupled to BF theory John C. Baez, Alejandro Perez "BF theory is a topological theory that can be seen as a natural generalization of 3-dimensional gravity to arbitrary dimensions. Here we show that...

Baez et al revised the title of their March 2006 paper to say "strings" instead of "loops" and reposted it http://arxiv.org/abs/gr-qc/0603085 Exotic Statistics for Strings in 4d BF Theory John C. Baez, Derek K. Wise, Alissa S. Crans 41 pages, many figures. New version has minor corrections and...

Hey guys I know you're probably going to laugh at me for this question, but what is the name of the pendulum thing with five balls suspended on strings? You know, the thing that every boss has on his desk in every movie? I have been trying to figure it out for a while now.

I have been reading about string theory, most recently about twistor string theory. I think that I have a basic understanding, but certainly am no expert. The helix is an important structure in transmitting information of various types: - music theory mathematics [wave and matrix] - only...

The image I get from reading the popular literature is that, according to string theory, there is a one to one relationship between strings and particles. Another way of saying this is that there are exactly as many strings in the universe as there are particles. The way that the string vibrates...

A particle P of mass m is attached to one end of a light elastic string of natural length L whose other end is attached to a point A on a ceiling. When P hangs in equilibrium AP has length \frac{5l}{3}. Show that if P is projected vertically downwards from A with speed \sqrt(\frac{3gl}{2}), P...

A particle P of mass m is attached to one end of a light elastic string of natural length L whose other end is attached to a point A on a ceiling. When P hangs in equilibrium AP has length \frac{5l}{3}. Show that if P is projected vertically downwards from A with speed \sqrt(\frac{3gl}{2}), P...

I watched the elegant universe and one scienetist noticed the euler beta function seemed to explain what he was doing and it had properties of a vibrating string. So I'm wondering if I could find his original paper, explanation or some additional info.

I have to read a list of strings in from stdin and store them, stopping when a blank line is entered. Here's what I tried... const int LINE_CAP = 100; const int MAX_LENGTH = 80; char *strings[LINE_CAP]; int strings_index = 0; char buffer[MAX_LENGTH]...

Does string theory touted as TOE offer a possible explanation of what happens beyond the event horizon? If not what may?

http://arxiv.org/abs/gr-qc/0509091 A liquid crystal analogue of the cosmic string "We consider the propagation of light in a anisotropic medium with a topological line defect in the realm of geometrical optics. It is shown that the effective geometry perceived by light propagating in such...

Three objects are connected on a table as shown in the http://www.cybertrails.com/~reedaz/pic1.JPG . The table has a coefficient of kinetic friction of 0.350. The objects have masses of 4.00 kg, 1.00 kg, and 2.00 kg. The pulleys are frictionless. Determine the acceleration of each object and...

Hi, If elementary particles are nothing but a mode of vibration of a string, and if strings are on the order of Planck's length, then how did we end up with particles that are as big as 10^20 times Planck's length?

In special relativity we say that a particle traveling at the speed of light uses all its energy to do so and thus has no energy for anything else. ie (movement through time) This begs the question; what is giving the string the energy to vibrate? Or does its maximum vibration equate the speed...

For your thoughts... a theory of mine... A Method by which shape shifting strings may explain: 1. Plasma 2. Hydrogen 3. Helium 4. Neutrons 5. Gasses 6. Liquids 7. Solids Consider the following: If a string, was a string, in shape, in only one STATE of its existence, then one...

In the list of talks on the program for Strings 06, how many titles do you expect will mention background independence? Looking at the Strings 05 program, you see this year the number is ZERO http://www.fields.utoronto.ca/programs/scientific/04-05/string-theory/strings2005/speakers.html...

Is there an explanation for gravitational time dilation in string theory? String theorists say their equations can make the same predictions as general relativity, so I would assume string theory predicts gravitational time dilation, but how would that work? If gravity is no longer mediated by...

Is there an obvious reason why the compactified dimensions of string theory are never invoked as a “medium” for quantum theory’s nonlocal communication? Lightspeed restrictions apply in the extended spatial dimensions but it would seem that all parts of the universe would be in touch almost...

Is light composed of "strings"? I read Professor Michio Kaku book Hyperspace and have tried to create an online paper asking if light waves are composed of the elusive "strings" and if the light or strings could be manipulated without the energies required by Plank constant...

If particles are made out of strings then it seems to follow that strings are, or can be, both local and non-local. Is this correct? I haven't seen any discussion of the wave-particle nature of strings (or the property of strings that allows particles to be also waves) so I assume I'm wrong...

Are lightwaves related "strings" I am asking if the waves in light could be related to strings in superstring theory as explained on this website: http://www.geocities.com/certvolunteer/physics/index.html I am a layman and not math oriented. Chris w