Relationship Definition and 999 Threads

i have been given to understand that the standard model is not a "particle" theory (even though the only things listed there are particles), but rather a "field" theory. i also (somewhat) understand that particles are not actually "things", but rather manifestations of the underlying field...

Are there any special relationships between the column vectors of a matrix and the corresponding column vectors of its inverse?

F=GM1M2/r^2 The force of gravity without mass is 0. Wouldn't this imply that gravitons and higgs bosons come in pairs? Is there any evidence of gravitons and higgs bosons existing only in pairs?

The drag force can be affected by the velocity of the object relative to the fluid. Does that mean the wind affects the drag force, since it changes the velocity of air particles?

Hi all, I am in introductory physics and we are doing a self-designed lab. For my lab, I wanted to study the relationship between the wavelength of light and voltage. To do this, measured how much voltage drop there was in a single celled solar panel when I put colored filters over a light that...

So I feel like a complete moron for asking this. I have never been very strong in geometry so I wondered if a few math folks could help me out. I am just looking for the angle relationships of gamma, alpha, and beta. This is just a small piece of a much larger analysis that I am doing. I...

Homework Statement As showing in the picture, I need to get the relationship of UA, Ub and Uc. I am a mathematical student and weakly in physics, so I come here to get some help. Homework Equations The Attempt at a Solution

While playing around with some laser diodes I have at home ~(405, 550, 650 nm) I have noticed that the refracted angles through some mediums (all?) is different. That is, if I fire my 405nm laser through some water at \theta_{1}=80°, the angle of refraction is ~\theta_{2}=47.01±0.05°. Now...

Hello, I'm a civil engineering student. I learned how to contruct a funicular polygon and bending moment diagrams in two different subjects and I realized how close looking the two are, so I wondered if there was a good explanation to relate the two. I can feel it's kind of the same as the...

Homework Statement Q.1 Describe a device which can have Kinetic Energy but no linear momentum. Q.2 Is it possible to invent a device with linear momentum and no kinetic energy. Homework Equations p = mv Ek = ½ mv² The Attempt at a Solution For a "device" to have no linear...

Some background: I am a senior in high school taking astronomy, so admittedly i do not know much about the structure and physics of the universe. However this is something that I've come up with on my own. I spend a lot of time just thinking about the universe, and this is one thing that just...

Is there a way to take a known path, all the existing forces/fields along it, and solve for a driving force function that results in an object moving along that path? but solving it without knowing the speed along that path, only the path itself, and maybe the total time taken from A to B along...

Sorry, If I couldn't reach out for the actual meaning of my question. Its my bad english. Q : What's the exact relationship between charge and the mass? I found that charge never exists without mass. It should have any amount of tiny mass associated with it to exist. So, why is it so? If there...

I understand everything up until: √MgL/m = L/t Why is that equal to L/t? I also don't understand this either: This is the problem itself however I don't feel it's that important since I am trying to figure out how they are arriving at their conclusions. An astronaut on a small...

Is it true that if an n by n matrix A has n-linearly independent eigenvectors, then it must also be invertible because these n-eigenvectors span n-space. But does this reasoning work the other way around: that is if A is invertible, does that imply n-linearly independent eigenvectors can be...

Hello, Does the column space of a matrix A always equal the column space of the rref(A)? i.e. are the solution sets to Ax=b, or even Ax=0 the same for A and rref(A)? When doing some examples of matrices that had some linearly independent columns it seemed the Span was preserved by row...

Homework Statement So I'm doing a string/wire telephone experiment where I'm using a signal generator to vibrate a wire at a certain input frequency. I am then taking results down for the Amplitude output. I'm not quite sure on the relationship between Stiffness constant K and Amplitude. I've...

I have a question regarding the relationship between differential pressure across a filter, the airflow through the filter and the size of the orifice that the aire is moving through. I would like to be able to predict differential pressure required to maintain a constant airflow as the filter I...

Hi there, I am confused about the relationship between coordinate systems and reference frame in GR. I understand the coordinate systems can be used to describe reference frames, for example, Local inertial frames in GR can be defined by Riemann Normal Coordinates. However, take the...

Homework Statement Here is the diagram and I need to find a relationship between the acceleration in block A and the acceleration in block B. http://dl.dropbox.com/u/64325990/HW%20Pictures/datum2.PNG The Attempt at a Solution Here is my diagram, which is wrong...

If z and \omega are two complex no. such that \mid z \mid =\mid \omega \mid = 1 and \mid z+i\omega \mid = \mid z-i\omega \mid = 2.Then find value of z

Hi All, In an experiment I ran to determine the trend between distance and magnetic force (produced by an electromagnet) the result showed that the trend was either an inverse quartic or inverse quintic function. Such a result was unexpected as the trend is documented as being an inverse cubic...

Hi folks. So I've found in multiple places the formula R=R_{0}[1+\alpha(T-T_{0})] with qualifications that for a given material it will only work for certain temperature ranges. However, I've never seen it turned into a differential equation and solved explicitly. It seems like a perfectly...

I'm trying to calculate the maximum volume of Helium gas that can be ionized into plasma if I apply a power of 1 watt, where the voltage is 1000 volt and the current is 0,1mA. The ionization energy for Helium is 2372,3KJ/mol (1/2372,3*10^3)mole * 2372,3*10^3 J/mole = 1 Joule 1 Watt = 1...

Homework Statement If U is a 2 x 2 unitary matrix with detU=1. Show that |TrU|≤2. Write down the explicit form ofU when TrU=±2 Homework Equations Not aware of any particular equations other than the definition of the determinant and trace. The Attempt at a Solution I have...

(Part of) The proof/logic of Bell's theorem goes thus: With the measurements oriented at intermediate angles between these basic cases, the existence of local hidden variables would imply a linear variation in the correlation. However, according to quantum mechanical theory, the correlation...

Hi everybody, I am working with ultrasound-induced cavitation (i.e. what is used in ultrasonic water-bath cleaners) and I can't make my mind around the concept. I recon cavitation happens when the acoustic pressure (p) induced by the sound waves is greater than the hydraulic pressure of the...

Homework Statement Which of the following statements about friction is correct? I. Kinetic friction always decreases the mechanical energy of a system. II. The static friction force cannot change the mechanical energy of a system. III. The force of friction always points in the direction...

A spring is at the bottom of a frictionless incline. When a box of mass M compresses the spring distance x and is released from rest, the box slides distance d up the incline (measured from where the box is at rest). a) Suppose a box of mass 2M is used to compress the spring distance x,and is...

I am trying to make a .4 Tesla AC (50Hz) magnetic coil. Originally I used ID-38MM, OD-155MM & Length of Solenoid 50MM. Using 3.5MM X 1.5MM wire 380 Turns. I get 0.27 Tesla at 75Amp. but the wire allows me to work only for around 5 Min with Forced air cooling. I do not know the relationship how...

Is "space" a thing or a relationship between existents? When I think of "space", I think of the distance between things rather than "space" being a thing like me or a planet or some other existent. If "space" is a a thing and not "nothing" can it be described like any other thing that exist...

Homework Statement What is the relationship between the weight of the hanging washers and the force acting on the stopper by the string? Here is the diagram provided by the book: http://www.goodreads.com/photo/user/5034346-kylaia-formerly-known-as-klymene?photo=454140 It also says to...

Is there some sort of relationship between the differential dx and the differential operator which means to take the derivative d/dx if x is a dependent variable? My prof said that dx * d/dx = 1 but that doesn't seem to work out in the case I'm looking at, so I must be missing something.

Hi, i was doing practice questions for an exam in a couple of weeks and i had his question: An object is dropped from height hand strikes the ground at time t, if the object is dropped from a height of 2h, which of the following represents the time it will take to strike the ground? A. t B...

Homework Statement The four points shown in the attached picture are near a positively charged rod (shaded circle). Points W and Y are equidistant from the rod, as are points X and Z. A charged particle with mass 3.0 x 10^-8 kg is released from rest at point W and later observed to pass...

Homework Statement In the reaction between a reactive metal and an acid the rate depends on the concentration of the acid. In a perfect experiment with all variable kept constant the rate of reaction and the concentration would be directly proportional to each other. However if in the...

Why is it that atoms must have 8 valence electrons in order to be stable? Aren't electrons most stable when the orbital is completely filled? Helium's electron configuration is 1s^2, Neon's is 1s^2 2s^2 2p^6, etc. All the noble gases, except for helium, have the p orbital filled. I'm...

In this diagram: http://img692.imageshack.us/img692/3012/tqmo.png what exactly are they trying to convey as in, what is the relationship between TQM, QA, QS and QC? Does each outer circle encapsulate all the inner circles? For example, it QA a part of TQM, while QS is a part of QA etc.? I...

Dear Physics Forum, Is there any model where the electron and quark share a fundamental relationship, maybe in some string theory? I ask because it seems too much of a coincidence that two completely independent particles would have a simple charge relationship of 1/3:1 . Thanks, Mark

Homework Statement Relate the frequency of a harmonic oscillator (spring) to that of a simple harmonic oscillator (pendulum) Show all derivations. Homework Equations pendulum: f=(1/(2∏))√(g/L) The Attempt at a Solution Not exactly sure how to go about this...is it saying...

First of all sorry if this is the wrong section! For a physics assignment, I am given a graph of which I am to gather data from. Graph 1: In an experiment to investigate how the celcius temperature, T, affects the volume, V, of an enclosed sample of air at a constant pressure, a students...

Doing some reading into photonics and nanophotonics. It seems that if a hole is smaller than the wavelength of light, then the light cannot go through the hole. For example, if a hole is smaller than 570nm (green), then green light and light with wavelengths less than 570nm can pass through...

What is the relationship between the equation E^2 - p^2c^2 = m^2c^4 and E = mc^2?

Problem : A conducting metal balloon of Radius ' R ', essentially of negligible mass is charged with charge ' Q '. It has to carry a payload of mass ' M '. Find how the charge ' Q ' depends on the mass M and the Intrinsic Energy ' W ' of the balloon. Attempt: We have P_{atm} =...

Two speakers A and B are separated by 1 meter, the point P is 4 m away from speaker B. If P is a person for what frequency does he hear that the intensity have a minimum?. (The listener hear that the sound intensity reduces and increases).I don't know the distance from P to B. (They form a...

Hi, I'd like to fit a straight line to some data which is noisey with gaussian noise with some st dev. Using least squares, I can estimate the slope and intercept. I'd like to know the uncertainty in these numbers. I can find the residue, I believe this is a measure of the variance of the...

Is there a relationship (or equation) between a charge carrier's drift velocity through a conducting material and that material's resistance? I'm trying to reconcile the idea that drift speeds are bigger when cross sections are smaller and the idea that resistance is bigger when cross sections...

Homework Statement A mass attached to a spring which is mounted on a turntable. If you wanted to double the angular velocity, but keep the radius of the circle the same, by how much would you change the spring constant? Homework Equations \omega = \frac{v}{r} The Attempt at...

Homework Statement do you notice a relationship between the plane and directions of the same miller index? what is it? Homework Equations I've done planes and directions (111), [111], (112), and [112] The Attempt at a Solution I believe the direction is normal to the plane on first...

Homework Statement When the voltage across the two plates of a capacitor is increased then: *a. the charge will increase b. the charge will decrease c. the capacitance will increase d. the capacitance will decrease Homework Equations CV=Q The Attempt at a Solution...