String Definition and 1000 Threads

Homework Statement This isn't actually a homework problem it's a problem I'm having in research since the fortran code I was given spat out a huge chunk of numbers. I've gotten the new-lines removed and I would like to graph what I have but it should really be organized in like 8-tuples. I...

Homework Statement A wave travels along a spring at speed v0. What will be the speed if the string is replaced by one made of the same material and under the same tension but having twice the radius. Answer in book says (v0/2) Homework Equations v=√(T/μ) speed= square root of...

From whst I have read, anything smaller than Plancks length, you need to account for quantum gravity.. also, it is assumed strings in string theory are Plancks length.. so how could anything be smaller than Plancks length if strings are Plancks length(or greater than)? I thought strings made...

Homework Statement Two uniformly charged spheres are suspended by strings of length L from vertically adjustable supports. The spheres are in static equilibrium. The angles with respect to the vertical are Q=14.9°, and T=20.7°. The tension in the string supporting sphere Z (Z with respect to...

Background-independence is the requirement that the theory be formulated based only on a bare differentiable manifold but not on any prior geometry. General relativity is the first example of such a theory. This is a radical shift as all theories before General relativity had part of their...

I have a lab to find the relationship between the two. I know the relationship, but I have to be able to measure the force of tension in a guitar string, or calculate it WITHOUT using the frequency. Is there an equation to solve for string tension where is it set up like a guitar string that I...

Hi all, I've got a question about waves and standing waves on a string fixed at both ends. I understand why only certain discrete wavelengths / frequencies are allowed to generate standing waves on a string such as a guitar string. My question pertains to understand what happens when a guitar...

hello, I find both quantum mechanics and string theory to be a bit iffy. Mabey it's just because I don't understand it but I think the best way to understand the iffy stuff is to post it on here. Mentors might see this as a debate or going against mainstream physics but how are you able to make...

Can Someone Explain What String Theory Is? (Simple Terms With Examples) Ive been hearing a lot of references to this new string theory, what is it?

Homework Statement A string 40.0cm long of mass 8.50g is fixed at both ends and is under a tension of 425N. When the string is vibrating in its third overtone, you observe that it causes a nearby pipe, open at both ends, to resonate in its third harmonic. The speed of sound is 344m/s. a) How...

Is it true that strings can vibrate in certain manners in which they cause a "ripple effect" in spacetime, affecting the topology of the higher dimensions, causing these different timelines to occur in which you have changes so minor as to electrons a plank's unit to the right, or so drastic as...

I'm trying to put together a little physics project, and I've constructed a rudimentary stringed instrument using a 2-liter bottle and some string. The string is fed through the bottom of the bottle and wound around a small dowel at the top end, and a small hole has been cut near middle of the...

There was a thread about how to describe the proton in string theory that was deleted while I was writing an answer, so I will post my answer here in a new thread. How the proton, and processes inside the proton, are described in string theory, is an open research question, part of the area...

Homework Statement In ”almost inertial” coordinates the energy momentum tensor of a straight cosmic string aligned along the z-axis is T_{\mu\nu} = \mu\delta(x)\delta(y)diag(1,0,0,-1) where μ is a small positive constant. Look for a time-independent solution of the linearized Einstein...

Homework Statement What is the tension of a string between 2 blocks of equal mass that are moving due to a pull of 17 Newtons?http://postimage.org/image/pmoibsy4p/ A. 8.5 B. 0 C. 17 D. 25 Homework Equations F=ma The Attempt at a Solution 17

Hey guys, who can tell me briefly about the 10+1 dimensions in the string theory? I am going to deliver a short presentation on string theory ,but i am not very clear about the reason that we have to introduce 11dimendion to string theory ...

Not sure what's going one, as soon as I remove the line with String[] arraySuit... all errors go away. With that statement in I get errors on several lines. Cannot figure out what's wrong. /* * Semester Project * Blackjack Class */ package project; import java.util.*; /** *...

This isn't actually a homework or coursework problem, but the style of the question is similar so I'm posting it here. Anyways, here goes. Consider a string of length L clamped at both ends, with one end at x=0 and the other at x=L. The displacement of the oscillating string can be described by...

string endpoints move at light speed--? In Zweibach's introduction to string theory I encounter the assertion that the endpoints of an open string move at the speed of light. A few other sources on the web agree with this. But nobody bothers to tell me what the heck it means (not even in...

I want to know if wave length or frequency will change when a wave move from a string of a certain linear density to another of a different linear density?

Homework Statement This is a communication question, no variables given: Predict what happens to the wavelength of a wave on a string when the frequency is doubled. Assume that the tension in the string remains the same. Confirm your prediction mathematically. The Attempt at a...

I just recently seen an article that the recent findings at the LHC seem to disprove supersymmetry. I would like to know how supersymmetry and string theory are connected and what the implications would be if the LHC totally disproves supersymmetry all together?

Here is a tricky one (for me) that uses linear mass density and two masses. I don't really know which to do so I did both! Homework Statement An object can be hung from a string (with linear mass density μ=0.00200kg/m) that passes over a light pulley. The string is connected to a...

Homework Statement I have a question pertaining to the simple harmonic motion of the midpoint of a guitar string with a frequency of 4.40 x 10^2 Hz and an amplitude of 1.60 mm. I've been asked to deduce the initial displacement, velocity and acceleration of the midpoint of the string, but am a...

Homework Statement A heavy wheel (radius = 0.3 meters, mass = 12 kg) has a rope spooled around it. A woman pulls on the rope from below with a constant force. She is able to bring the wheel from rest up to 1 radian per second in 10 seconds. [Ignore friction in the hub of the wheel.] a)...

Hello, I am a high school student trying to learn physics out of Kleppner and Kolenkow. Unfortunately, the solutions to some of the problems are not available online, nor is a solutions manual available, so I am unable to find out where I am wrong in some cases, such as this one. I would...

Homework Statement A small mass M attached to a string slides in a circle (Y) on a frictionless horizontal table, with the force F providing the necessary tension (see figure). The force is then decreased slowly and then maintained constant when M travels around in circle (X). The radius of...

Homework Statement Two bodies with masses m1 and m2 are connected by a massless thread that supports a maximum force |Ft|max . On mass m1 the force F1 = -β t x and on mass m2 the force F2 = 3 β t x (t: time, β: constant) acts. The motion is frictionless. Homework Equations When does...

Homework Statement A string of length L and mass m, hanging an object of mass M from the ceiling. After sending a transverse pulse from the top of the string , how much time we have to wait until the reflected pulse returned to the top? Homework Equations The time interval for a...

The string in the Figure is L = 120 cm long, has a ball attached to one end, and is fixed at its other end. The distance d to the fixed peg at point P is 75.0 cm. When the initially stationary ball is released with the string horizontal as shown, it will swing along the dashed arc. What is...

Homework Statement A tetherball with a string length of 1.5m is hit in such a way that it completes a circle around the pole with the string at 30 degrees from the pole. Assuming it doesn’t lose a significant length during the trip around the pole and hence takes a perfectly circular orbit...

Homework Statement Two particles A and B each of mass m are attached by a light inextensible string of length 2l .The whole system lies on a smooth horizontal table with B initially at a distance l from A.The particle at end B is projected across the table with speed u perpendicular to...

A 6.0kg box is on a frictionless 35° slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.0kg weight. What is the tension in the string if the 6.0kg box is held in place, so that it cannot move? m1= 6.0kg m2= 2.0kg θ=35° So, for Box 1 to be...

Homework Statement Two boxes are connected by a massless string. The first box's mass is 16kg and second box's mass is 21kg. You pull with a total force of 185N on the 16kg box. The coefficient of friction is 0.5. Calculate the tension in the string between the two boxes. Homework...

Homework Statement A 6.0kg object is attached to two 5.0m-long strings and swung around in a circle at 12 m/s. Determine the tension in the two strings, and explain why the tensions are not the same. Given: m=6.0kg v=12m/s length of string= 5.0m Homework Equations ƩF=m.a ac=v^2/R...

The problem : 3 identical balls lie on a smooth horizontal surface, the 3rd ball moving with a velocity v while the other 2 are stationary and inter-connected via a taut inelastic string. Ball 3 strikes ball 2 normally making angle = 30 degrees with the string. Energy is conserved. We need to...

Homework Statement http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w09_qp_41.pdf number 6III...

I am asking user to enter a number if user hits enter key instead of entering a value then i need to exit the program. see code below ; i put the value into eax cmp AL,0 ;i compare is al reg is empty je exitProgram ; some instructions exitProgram: Invoke ExitProcess,0 Public...

. Homework Statement The tension T in the string of the yo-yo is given by: T=(mgR)/(2r^2+R^2) where m is the mass of the yo-yo and g is the acceleration due to gravity. Use differentials to estimate the change in tension if R is increased from 3cm to 3.1cm and r is increased from 0.7cm...

Just about few hours ago,my friend and i argued about which theory is the best theory nowadays ever existed. I claim that string theory is the only game in town as what i heard from Dr. Michio Kaku's TV shows, while my friend strongly disagree with it. He claimed that quantum theory is the best...

This is the troublesome part eLeftOutFile = 'data/ElonL'//fileNameSuffix(0:25)//'.dat' OPEN(754,FILE=eLeftOutFile,STATUS='REPLACE',ACCESS='SEQUENTIAL') First off, fileNameSuffix is a CHARACTER(len=40) just to be safe, I am just cutting it off, since those are the relevant parameters...

Homework Statement A massless string having three beads of identical mass attached to it is placed so that it hangs at rest on a thin frictionless peg, as shown. Of course, the string then slides over the peg and falls to the ground. If h = 55 cm, what is the speed of the lowest bead at the...

Homework Statement "What is the tension in the string?" .5kg block Suspended at the midpoint of a 1.25m-long string Ends of string attached to ceiling are 1m apart.Homework Equations cosθ, sinθ, tanθ T_1_x+T_2_x+F_g_x=ma_x T_1_y+T_2_y+F_g_y = T_1_y+T_2_y- F_g = ma_xThe Attempt at a...

I think I've solved this, I'm looking for an answer check. Homework Statement Given the picture above, find the acceleration of the block and the tension in the string. Assume the string preforms ideally and the pulley is frictionless. Homework Equations Fnet = ƩFx + ƩFy = maThe Attempt at...

Homework Statement The figure below shows an object of mass m1 = 1.1 kg on an inclined surface. The angle of the inclined surface is θ = 31° with the horizontal. The object m1 is connected to a second object of mass m2 = 6.10 kg on a horizontal surface below an overhang that is formed by the...

I don't know much about physics but I know some math. So say I want to set up an experiment (hopefully easily reproducible) where I have a string (I can find out what I like about the string) tied to a spot above the ground. It is hanging straight down. Say I tie a zip lock back to it and I...

Homework Statement A pendulum has a length L = 1.13m. It hangs straight down in a jet plane about to take off as shown by the dotted line in the figure. The jet then accelerates uniformly, and while the plane is accelerating, the equilibrium position of the pendulum shifts to the position shown...

Homework Statement i apologies in advance if this is not posted in the correct section but it seemed the most like basic physics to me. Well i have a question that i need help answering for my own enjoyment.I am an avid Shotgun Shooter and all through out my live i have always been told...

according to the string theory, what is the difference between the strings that make the photons and the strings that make the protons? photons don't have mass and protons do, does it all ultimately rely on simply how the strings vibrate, or what? do photons' strings have lowest energy possible...

Homework Statement The attachment shows the string which is light and inextensible passing over two pulleys which are NOT massless. Hence they have some mass and some Moment of inertia. There is no friction in the pulley thus the pulleys are free to rotate. K ≥ 1 we know that the...