Strings Definition and 548 Threads

Adagio for Strings is a work by Samuel Barber, arguably his best known, arranged for string orchestra from the second movement of his String Quartet, Op. 11.
Barber finished the arrangement in 1936, the same year that he wrote the quartet. It was performed for the first time on November 5, 1938, by Arturo Toscanini conducting the NBC Symphony Orchestra in a radio broadcast from NBC Studio 8H. Toscanini also played the piece on his South American tour with the NBC Symphony in 1940.
Its reception was generally positive, with Alexander J. Morin writing that Adagio for Strings is "full of pathos and cathartic passion" and that it "rarely leaves a dry eye". The music is the setting for Barber's 1967 choral arrangement of Agnus Dei. Adagio for Strings has been featured in many TV shows and movies.

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  1. J

    Tension In musical strings and wavelength

    Homework Statement One string of a certain musical instrument is 79.0cm long and has a mass of 8.79g . It is being played in a room where the speed of sound is 344m/s . A)To what tension must you adjust the string so that, when vibrating in its second overtone, it produces sound of...
  2. C

    String theory - what do strings look like?

    I've watched a few documentaries about string theory, read about it, heard people talk about it. But I cannot visually grasp what the heck strings look like. Physicists (maybe not all of them but the ones I only hear) like to say stuff like that if you pluck a guitar string you get a certain...
  3. Z

    Finding Characters in Strings: timesFound() Function

    I have an assignment for my CS class. It is the following: * * complete the function: * * timesFound(string searchIn, char searchFor); * * The function should return the number of times the * character searchFor appears in the string searchIn. * */ int timesFound(string...
  4. T

    Tension in two strings and different angles

    Homework Statement In a rescue, the 72.0 police officer is suspended by two cables, as shown in the figure below. Homework Equations T = mgsin(48)? T2 = mgsin(35)? The Attempt at a Solution I used the above equations and it is not right. Me and my friend have been working on...
  5. Demystifier

    How do D-branes fit into closed string theories?

    By definition, D(irichle)-branes are branes on which open strings end. Then how closed string theories IIA and IIB may contain D-branes? Or more precisely, why the branes appearing in closed string theories are still called D-branes?
  6. MTd2

    Could bosonic strings be a kind of projective space of m-theory?

    Just like you can create the ilusion of superluminal motion by projecting a flashlight into a wall, some strings would be projected into tachyons. Has anyone heard or thought about that?
  7. T

    Two strings spinning rock- tension

    Homework Statement A string 44 cm long will break under a tension of 24 N. Two such strings are tied to a 670 gm rock, their ends 60 cm apart. The rock is spun between them. What is the maximum speed it can spin before the string breaks? (Using pythagorean theorem, you can determine the radius...
  8. A

    Exploring the Possibility of Knotted Closed Strings in Higher Dimensions

    Hi all ! I am curious about the possibility of knotted strings. If we can accept the propagation of closed loop strings, then shouldn't we consider the possibility of knotted, closed loop strings ? I do not see - offhand - any reason why a closed string cannot be knotted. Think of a...
  9. MTd2

    Has anyone heard of Anyonic strings?

    Anyon are particular 2 dimensionsional objects and so is the worldsheet critical superstrings. But given that those 2 are extemely fashionable nowadays, and they happen in this dimension, I am extremely surprised to find that anyone didn't try anyonic strings. That is, instead of supersymmetric...
  10. MTd2

    Petr Horava's quantum Gravity ( without strings)

    Petr Horava attempts to start at this paper a small quantum gravity theory, like Loop Quantum Gravity, except that he, according to his words: http://arxiv.org/abs/0901.3775v1 "In analogy with Yang-Mills, we are motivated to look for a “small” theory of quantum gravity in 3+1 dimensions...
  11. P

    Strings vs Blocks: Dimensions & Oscillating Volumes

    Why do strings only have one dimension (or maybe branes have 2 dimensions)? Why aren't oscillating volumes (like a cube) used?
  12. P

    Debugging a C++ Program to Replace Strings

    Homework Statement Ok, i need to make a program that will search for a substring in a given string, and replace it with another one.The Attempt at a Solution #include<stdio.h> #include<iostream> #include<string.h> using namespace std;int fsubstitute(char *ulazni, char *prvi, char *drugi)...
  13. R

    Quatum Fields, Strings, and Parallel Universe

    Hi I know I have been asking many questions. It seems this stuff is a lot more difficult than I thought so: 1.) Is the Quantum Field the field responsible for the creation of forces and particles, if not what does it say in a nutshell. 2.) If there are parallel universes do they affect...
  14. WaveJumper

    Exploring the Mystery of 1-Dimensional Strings in Physics

    My question is simple and straight forward - how does a 1-dimensional string "convert" to a zero-dimensional point particle? And another one - for the purposes of physics, energy is not a physical object but an abstract mathematical construct. So how can a string of energy have a definite...
  15. C

    Constituent traveling waves and strings and vibrations

    Homework Statement A 30-cm long string, with one end clamped and the other free to move transversely, is vibrating in its second harmonic. The wavelength of the constituent traveling waves is: A) 10 cm B) 30 cm C) 40 cm D) 60 cm E) 120 cm Homework Equations L =...
  16. K

    How Does Energy Flux Balance in Connected Strings with Different Mass Densities?

    Hi there, Two strings, tension T, mass densities mu1 and mu2, are connected. Consider a traveling incident wave on the boundary. Show that the energy flux of the reflected wave and the transmitted wave equals the energy flux of the incident wave. (The energy flux of a wave, the energy...
  17. D

    How Many 5-Character Strings Include At Least One '@' Symbol?

    Homework Statement Given that the ASCII character system has 128 possible characters how many 5 character strings are there with at least one occurence of the '@' symbol. Homework Equations The Attempt at a Solution So clearly which symbol we're using doesn't matter, and I see...
  18. S

    What is the Tension in 2 Strings with a 119N Mass and Given Angles?

    Homework Statement A 119 mass hangs from two string Calculate the tension in both strings. Let θ1 = 77.0° and θ2 = 26.0 degrees Homework Equations Fnet=ma The Attempt at a Solution This is the last question of my homework packet (so its the most challenging) and I have no clue how...
  19. S

    C Newbie Help: Strings, Arrays, Getline() & Sscanf() - Urgent (Due Monday)

    I am required to use getline() and sscanf() somewhere in my function to read standard input and store it into arrays. I have input like this: 10/10/08 12:00 A1:2.31:1:P 2B:1.98:2:g 2b:1.82:3:b the first line is the time, which i used strcpy to copy it to an array called time[] the...
  20. F

    Tension Equal in Pulley System w/ 2 Strings

    This is a general question... Given a pulley system that consists of one pulley and 2 strings--each with a mass hanging from it. One mass is 3kg, the other is 4kg. In class we concluded that the tension on each string was equal--why?
  21. N

    A Mass Hanging From Multiple Strings

    A mass of 6 kg is hanging from a string, named string 3. The top of this string is connected to to other strings, string one which goes straight to the left to connect with a wall, and string two which connects to the ceiling making a 40 degree angle between the ceiling and the string. The...
  22. N

    Findin buckets' tension when there are two strings n two buckets

    [b]1. problem one 3.1 kg paint bucket is hangin by a massless cord from another 3.1 kg paint bucket, also hanging by a massless cord. if the buckets are at rest, what is the tension in each cord? If the two buckets are pulled upwards with an acceleration of 1.9 m/s^2 by the upper cord...
  23. M

    Calculating tension in each of 3 strings

    I have got a question i am having a lot of trouble with. The question is that three strings on unequal lengths are used to support a mass of 50g. All of these strings are used to support the weight. Two of these strings cannot be in the same plane as the other string. Determine the tension...
  24. L

    Period of a rotating mass held by two strings

    Homework Statement The 4.00kg block in the figure (Intro 1 figure) is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended as shown in the diagram and the tension in the upper string is 82.0 N. Homework...
  25. S

    Why is there skepticism surrounding string theory?

    Hey Guys, I am currently reading Brian Greene's The Elegant Universe which introduces many of the basic ideas behind string theory. While reading it i am constantly reminded of the skepticism with which many people regard string theory and it makes me wonder whether the book is biased or...
  26. A

    Which Pull Causes the Bird Feeder's Cord to Snap: Slow or Sudden?

    Homework Statement A bird feeder of large mass is hung from a tree limb, as the drawing shows. A cord attached to the bottom of the feeder has been left dangling free. A child pulls on the dangling cord. The dangling cord is cut from the same source as the cord attached to the limb. Is the...
  27. MathematicalPhysicist

    Will the Large Hadron Collider refute nonstring theories of quantum gravity?

    So, what are the theories' predictions which are going to be tested on LHC? And if they won't be found, Does it mean they will be refuted or not?
  28. C

    Analyzing Forces in a Three-String Knot

    Homework Statement Three strings, in the horizontal plane, meet in a knot and are pulled with three forces such that the knot is held stationary. The tension in string 1 is T1 = 2.9 N. The angle between strings 1 and 2 is q12 = 130° and the angle between strings 1 and 3 is q13 = 120° with...
  29. P

    What is the meaning of K in |an|\leq K (n \in \mathbb{N})?

    To prove that some function is limited we use |an|\leq K (n \in \mathbb{N}) where K = max { |m| , |M| } What this last part mean K = max { |m| , |M| } ? Thank you.
  30. P

    Is there any general formula for strings?

    Is there any general formula for strings? For example: what is the formula of this string -1,3,-5,7,-9,...? Thanks.
  31. L

    Problem with tension on two strings at angles

    mass m suspended by a pair of vertical ropes attached to the ceiling what are the rope tensions if they comprise a V shape each at an angle theta with the ceiling? i have played with this problem for a while and i can't seem to find what the relevant equations are really only first time...
  32. J

    Elegant Universe: No fundamental physical laws beyond strings?

    I've just read in the first pages of The Elegant Universe that Greene believes that all fundamental laws should be contained in the microscopic domain, all other laws are derived. Is it really so evident that the laws of thermodynamics are derived and not fundamental? The second law, is it...
  33. M

    Vibrating strings and string theory

    The fundamental part of string theory is that particles are in fact made up of vibrating strings. So this means that the lowest form of unit is a vibrating string? It goes like this Human - made up of atoms - atoms made up of subatoms (electrons, protons and neutrons)- quarks. And then...
  34. L

    What is the astronaut's speed when the spring's length is 1.2?

    Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating on a large spring. Suppose an astronaut attaches one end of a large spring to her belt and the other end to a hook on the wall of the space capsule. A fellow astronaut...
  35. O

    Geodesics and stretched strings

    Consider this real situation: Light from a far-background galaxy is observed to be lensed by a closer massive galaxy. Individual photons that graze the closer galaxy travel to the observer along various geodesic paths, as prescibed by GR. Now consider a very hypothetical situation. Suppose a...
  36. marcus

    What will be the physics content of the eight overview talks at Strings '08?

    I posted link to the Strings 2008 speaker lineup at the Announcements sticky. We can do some digging and get prepared for what is to be expected. there are eight one-hour overview talks, and nearly 30 half-hour specialized research talks. All the talks are plenary--all in the same...
  37. B

    Masses Connected By Strings May Be Treated as Rigid Bodies?

    Say you have 2 masses connected by a massless string, and another massless string is connected to the rightmost mass. A tension force T acts along this rightmost string, resulting in the string connecting the 2 masses to become taunt. In these cases, you can treat the 2 masses as one mass...
  38. T

    Help! Struggling to Grasp Arrays and Strings for Final Exam

    My final exam is tuesday and I am having an extremely extremely hard time grasping arrays and strings. I just can't visualize how they work and I am stuck on how to get my printOwnedShares function to work properly in a project that will help me study for the final. This is what I have worked on...
  39. S

    Tension of strings in an elevator

    Two masses are connected by a string and are hanging from the ceiling of an elevator like this: [string 1] | [4kg mass] | [string 2] | [6kg mass] Show the tension of each string in the following situations: i) Stationary ii) Moving up at 3m/s iii) Moving down at...
  40. C

    Ball on two strings, rotating around a rod

    Homework Statement A 1.0kg ball is attached to a vertical rod by two strings. Each string is 1.0m long, and they are attached to the rod a distance of 1.0m apart. The rod-ball-strings setup is rotating about the axis of the rod. As it rotates the strings are taut and form an equilateral...
  41. A

    What objects can be compared to strings in terms of length and energy scales?

    Could the string theory be interpreted as low-energy theory of elementary particles? As is known, the theory of strings has many interesting and important possibilities, but it cannot be verified because of the Planckian scale. Does arise the question: is it possible to construct the theory...
  42. arivero

    SO(32) in Superstring Theory: Physical Meaning

    Could someone tell about the physical meaning of these SO(32) groups in superstring theory? I am under the impression that it is a symmetry of the quantum superstring, but that it is not a symmetry of any underlying classical model, is it? Because if it is so, it is very different of the GUT...
  43. M

    Comp Sci The AnswerCreate C++ Program for Username & Password

    c++ strings help! Homework Statement Create a C++ program that would ask the user for a username and password. Password field should be masked. If the user exceeded three errors, a string will be seen on the screen which says “ERROR” and exits the program. username: ayen_lee...
  44. R

    Unraveling the Physics of Strings: Tension, Velocity & Slope

    Just a couple of Questions: for the wave function y(x,t) = A / (x-vt)^2+b ------> What is the importance of 'b' and what is its meaning? A Uniform Circular Hoop of string of mass m and radius r is rotating in the absence of gravity. Its tangential speed is Vo. Its length is...
  45. M

    Solving Tension in 2 Wires Attached to 360 g Sphere

    Homework Statement Two wires are tied to the 360 g sphere shown in Figure CP7.61. The sphere revolves in a hori*zontal circle at a constant speed of 6.5 m/s. What is the tension in each of the wires? Homework Equations I can't figure how to find the tension. With so little given i dnt...
  46. P

    Tension in Strings HELP thanks-very simple.

    [SOLVED] Tension in Strings HELP thanks!--very simple. Homework Statement A 16 kg object hangs in equilibrium from a string with a total length of L=5m and a linear mass density of u= 0.0010 kg/m. The string is wrapped around two light, frictionless pulleys that are separated by a distance...
  47. L

    A Bar Suspended by Two Vertical Strings

    Homework Statement A rigid uniform horizontal bar of mass m1 = 85.00 kg and length L = 5.300 m is supported by two vertical massless strings. String A is attached at a distance d = 1.500 m from the left end of the bar and is connected to the top plate. String B is attached to the left end of...
  48. K

    Open Strings, D-Branes, and Conservation of Energy

    Can someone please explain to me why string theories with open strings must also have closed strings? I've read it is due to conservation of energy, an open string not attached to a closed string will lose it's energy off an end. Does this mean all D-branes must be made from closed strings? I...
  49. S

    Traces of ‘Mythical’ Cosmic Strings Found

    controversial new study indicates that there are traces of vast cosmic strings left over in radiation from the early universe. If indeed confirmed to be real, these cosmic strings would offer an unprecedented window into the extreme physics of origins of the universe. The idea is that snags...
  50. C

    What Are the Fundamental Laws of Vibrating Strings?

    Hey, what are the laws of vibrating strings? I can't find it in my college physics books! Help please!
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