Strings Definition and 523 Threads

I am quite aware of the Physics behind Stationary Waves and how this is responsible for the different notes we hear on a musical instrument; a guitar for instance. What I don't fully understand is the classification of the oscillations of the string. Is it a free oscillation or a forced oscillation?

Don't know how I bumped into this but thought some of you might like this, https://groups.google.com/forum/#!msg/sci.physics.research/5w2S-j0Vyfw/A95XAYUGaWgJ By, Urs Schreiber 4/11/03 photon as strings for peasants (was: Meaning of dilaton field) Oz schrieb: > I presume...

So if I slowly pull the A string first B string will tear apart... Cause the A string will expand and it will pull the mass and B string... So B string will reach its breaking weight before A... Cause B has an additional weight mg working on it.. But if I suddenly pull the A string,it will...

Homework Statement problem attached Homework Equations The Attempt at a Solution well, there is pretty much nothing i can write here, i couldn't solve it because this is the first time i face a problem like that , i have some problems understanding it though 1-if we considered the...

Homework Statement A block of mass M is connected with a particle of mass m by a light in-extensible string as shown in the figure. Assuming all the contacts as smooth, find the acceleration of the block after releasing the system.Homework Equations F = Mass * Acceleration Normal Constraint ...

Homework Statement Q .Find the tensions in the strings (1), (2) and (3) and the acceleration of the mass ‘m’ just after : (a) string (1) is cut (b) string (2) is cut (c) string (3) is cutHomework Equations The Attempt at a Solution I feel the answer should be (a) T1 = 0 ; T2...

Homework Statement I need to write a program that takes a text file, and looks for how many unique words it has, as well as the number of times they occur in the file. Homework Equations None The Attempt at a Solution public static void main(String[] args) throws FileNotFoundException {...

Homework Statement A long string is constructed by joining the ends of two shorter strings. The tension in the strings is the same but string I has 4 times the linear mass density of string II. When a sinusoidal wave passes from string I to string II: A. the frequency decreases by a...

Lemma: If A is an at most countable alphabet, then the set A^* of strings over A is countable. Proof begin: Let p_n be the n^{th} prime number: p_0 = 2, p_1=3, p_2=5, and so on. If A is finite, say A = {a_0, a_1, ... , a_n}, where a_0, a_1, ... , a_n are pairwise distinct, or if A is countable...

Dear All, I was reading the concept of stationary waves in composite string ABC made up of joining two strings AB AND BC with different mass per unit length and a joint at 'B'.the two ends of the composite string are clamped at 'A' and 'C' and a transverse wave is set up by an external source...

To clarify, I'm not confused as to how massless strings can add up to make massive objects, I understand why that happens. My question has more to do with the speed at which strings move. If strings are massless, they must travel at the speed of light, correct? If so, then first off, what is the...

The lab requires me to displace that: Enter a string:This is a string One word per line is: This is a string How can I replace the ' 'with Enter. #include <stdio.h> #define STRSIZE 81 void dispStr(char message[STRSIZE]) { int i; printf("\nOne word per line is :\n")...

Homework Statement This is problem 7.7 in Zwiebach's book, 2ed ed. In (b) he want us to show that near the cusp, ##y\sim x^{2/3}.## In (d), Check that the period of the motion of the closed string is ##\sigma_1/4c##. How many cusps are formed during a period? Homework Equations (b)...

Is there a way to solve for the tensions in a mass hanging from three strings all in a plane, say? Is it solvable or is it indeterminate?

When two strings are used to suspend an object, is it possible for one or both of the angles to be zero (that is, one or both strings are horizontal to the ground) ? Why or why not? Deduce whether either of these scenarios is possible. I say no, it's impossible but i really don't know how to...

In string theory, a string is at or near the plank length. If a string is vibrating, or if it is curved into something like a circle, aren't you having something smaller than a plank length? With a vibrating string part of the string is inverted to the other part, this would mean that you...

I have an if-else piece of code involving strings String color = sc.nextLine(); if (color == "R" || color == "r"){ System.out.println("red"); } else if (color == "G" || color == "g"){ System.out.println("green"); } else if (color == "B" || color == "b"){...

I take it strings are too small to have "connectors" on their ends, there is no glue etc. so how could strings combine to become larger particles like bosons. I have never heard anyone describe the reason for the extra dimensions that string theory says are there. Could it be that these...

Homework Statement So, basic yoyo with center of mass O, moment of inertia Io , and mass m. Has an inner radius of r, and outer of R, and in contact with the ground at point p. Two strings are attached at inner radius r, each pulling with equal tensions, one pulling from the top of r directly...

The system is in equlibrium,find T1 and explain. Thanks.

Homework Statement Two equal spheres of mass m are suspended by vertical strings so that they are in contact with their centres at the same level. A third equal sphere of mass m falls vertically and strikes elastically the other two simultaneously so that their centres at the instant of impact...

1. The question The following message was originally transmitted with odd parity in each short bit string. In which strings have errors definitely occurred? 11001 11011 10110 00000 11111 10001 10101 00100 01110 2. The attempt at a solution It says that it is transmitted with odd...

Homework Statement Two similar tiny balls of mass m are hung from silk threads of length L and carry equal charges q. The angle formed by the two strings is bisected by an imaginary line, forming angle θ. Assume that θ is so small that tan θ can be replaced by its approximate equal, sin θ...

E&M Problem -- 2 Charged Masses Hanging on Strings Homework Statement Two charges of identical mass m, one with charge q, the other with charge 2q, hang from strings of length l from a common point. Assume q is sufficiently weak so that any angle you're looking for is very small, and find...

Homework Statement Why are pulleys frictionless and massless in the pulley questions? What would happen if they are not frictionless and not massless? Why are the strings connecting the blocks in pulley questions massless and inextensible? What would happen if they are not massless an not...

I have a MySQL database and I have the problem that queries take way too much time. I want to optimize the database and one way would be to save data into a string, instead of in rows (the string would be replicates of the same condition). Each string is an interval of 4 seconds, to reduce the...

Homework Statement Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force. The masses of the three blocks are 15.1kg , 19.8kg , and 36.0kg , Answer the following questions concerning the motion of the blocks. 1. If...

Homework Statement We have a three mass two strings system with: m_1 string M string m_2 The end masses are not attached to anything but the springs, the system is at rest, and k is equal for both strings and m_1 and m_2 are equal. The distance between to m_1 and m_2, on both sides of M...

Here's my battle plan: 1: Learn (the principles) of verified models for fundamental physics. QFT, GR, Standard Model, etc. 2: Try to think of what I don't know and what I'd like to experimentally test.I think I'd prefer to get a regular job and research physics in my free time, rather than be...

I was watching a Walter Lewin lecture on Newton's laws (which was great, by the way), and at the end, he presented this problem; There's a string hanging from the ceiling (actually not the ceiling, it was just a surface), and a cube is hanging from that string. There is another string, attached...

I want to know, how to make a CLASS FUNCTION to return a STRING. For example, taken that all variables are declared correctly. string personType::get() const { return firstName + " " + lastName; }

Are there stringy candidates for reproducing the SM and dark matter etc without low scale supersymmetry?

So I understand that: Protons= 2 up quarks and a down quark... and Neutrons= an up quark and 2 down quarks... and Electrons are not made of quarks (so small!) So my questions are: 1.) According the Heisenberg Uncertainty Principle, we don't know how many strings (according to string...

I am currently compiling, solving, and adding complexities to problems involving strings in physics. The scope of my work covers basically everything: from introductory physics to string theory. I'm looking for any suggestions for problems and any way to add complexities to a given problem...

Homework Statement "Two balloons are rubbed with wool. Let us assume that the two balloons are at rest (in equilibrium), have unequal charges (Q > q) and unequal masses (M > m). In which string is the tension greater, T1 or T2? Show your work for your conclusion.

Homework Statement A weight with mass m is strung up by two strings which are attached in A and B. The mass m is considered a point. Calculate the tension i in string A and in string B. Figure is here http://tinypic.com/r/1y1jrr/6 The mass m is 11,1kg Distance a is 3,2m Distance...

Homework Statement A thin uniform rod of length 2b is suspended by two vertical light strings, both of fixed length l, fasted to the ceiling. Assuming only small displacements from equilibrium, find the Lagrangian of the system and the normal frequencies. Find and describe the normal...

Homework Statement Find the forces of the three strings of this image. http://www.flickr.com/photos/79276401@N05/8395815988/in/photostream Homework Equations Using gravitational constant to find force of the mass. Using algebra to find the forces of the three strings. The Attempt at a...

I have reading about cosmic strings and have some questions about them, are they in any way related to other dimensions even though they are one dimensional? Also do they have anything to do with gravitons and the cause of gravity?

Hello, The problem is: Three blocks are connected by two ropes as shown. They are on a surface wit ha coefficient of friction of 0.25. The masses of the blocks are m_1=6~kg,m_2=9~kg,m_3=12~kg. Block 1 is pulled with a 93~N force horizontally as shown. Find the tension in each rope...

Hi, I have been stuck on this question for a while, and I need help figuring it out. For a lab, we had two ring stands set up about 1m apart from each other, with the rings at different heights, and we tied a string between them. We then placed a 200g mass on the string. We had a LabPro with a...

Homework Statement A ball of mass m is attached by two strings to a vertical rod. as shown in the diagram attached. The entire system rotates at constant angular velocity ω about the axis of the rod. a)Assuming ω is large enough to keep both strings taut, find the force each string exerts...

Homework Statement In the picture, what are the tensions in strings 1, 2, and 3? http://www.flickr.com/photos/90172232@N04/8194075362/ Homework Equations The Attempt at a Solution I know string 3 is obviously 200N. I forget how to solve for the other strings. Do I add...

I am trying to self learn kinematics , but i don't understand a certain concept :- If a string hold a mass which in turn holds another mass by a string. by F.B.D to in forming the first equation , we take T1 = m1g +t2 but shouldn't the second mass be included as well. eg...

Homework Statement One way to tune a banjo to itself is to fix the frequency of one string (say, the "A" string) and compare the frequency of the "D" string while held at the seventh fret (so that it should also produce an "A"). If the "D" string is tuned correctly, then the "A" played by the...

Quantum mechanics tells us that particles have a wave-like nature: their position, momentum and energy are not absolutely defined, and obey the Uncertainty principle. One thing that strikes me as peculiar in String Theory is how much internal structure string appear to have at the Planck...

If e=mc2 and strings are a form of energy will they not have a measurable mass?

Hey all, So declaring integers successively in memory (using .word) in an array is all well and understandable. Since an integer is 4 bytes in length, as is a memory word. For example: .data x: .word 2, -13, 24, 123 #initialization of elements 0 to 3 of array x However, how would...

I've been studying, just for pleasure, but studying in the end, a lot about QFT and its prerrequisites reaching some not so bad understanding of the Standard Model. I know that I still have to fill a lot of gaps, but nevertheless, I am looking for some new topic to start reading (while I fill...

Homework Statement We have a problem set on my Discrete Mathematics class: Let X be the set of strings over {a,b} of length 4 and let Y be the set of the strings over {a,b} of length 3. Define function f from X to Y by the rule: f(alpha) = string consisting of the first three...