Relationship Definition and 986 Threads

WHY!? is the relationship between speed and time exponential? I am actually a finance major but I like to learn about physics on my spare time. One of the more fundamental concepts I am having a hard time understanding is why the relationship between speed and time is exponential. Can someone...

I have measured photoluminescence (PL) and light absroption spectra of some transtion metal oxide nanostructures. The PL intensity increases remarkably by decreasing the size of nanostructures. However, the intensity of absorption vary litte. Is there any relationship between the PL intensity...

What is grammatically more correct? There exists a relation between x and y. or There exists a relationship between x and y. So, "relationship" or "relation"?

Dear all, I would like to know how exactly the inductance varies with change in applied voltage with respect to time and if there is any mathematical relation for the same available. Regards, rc

I suppose this is more of a math question, but it's a bonus question in my chemistry upgrade class. Homework Statement Prove the relationship 760mmHg=101.35kPa mathematically, by using conversion factors. Homework Equations 1 Pa=1 kgm/s2 (No it doesn't?...) density of Hg=13.6g/cm3...

Homework Statement From Hill's "Introduction to Statistical Thermodynamics", question 3-4 reads: (note "STR" denotes the case of most probable distribution and should be read as C*) Homework Equations The most probable distribution for a system of independent indistinguishable...

So I recently bought a couple of magnets for an experiment and the website lists the pulling force of the magnet as 24 pounds. I am pretty sure there is a relationship between the pull force and the magnetic field. Can someone please help? Thank you!

Suppose an nxn matrix has n distinct eigenvectors vi when treated as a linear operator over ℝn. What is the relationship between these and the eigenvectors of the matrix when treated as a linear operator over ℝnxn, the space of nxn matrices? Since a matrix L acting on one with columns a1, a2...

Homework Statement We did an experiment using resistance putty and a multimeter. We changed the radius of the putty but kept the length the same. We recorded the resistances at different radius'. I know that physics theory says that resistance is inversely proportional to cross-sectional...

Homework Statement What is the effective force constant of 2 springs which are connected in series? What is the general relationship for n springs connected in series? Homework Equations im not sure if i should use or is the formula for a series circuit also relevant? The...

Just trying to get my head around the very basics of the Higgs discovery. Could someone describe the relationship between the Higgs Field and the Higgs boson. A confusing point for a layman like myself is that if the particle decays so rapidly, how is it that there is an omnipresent Higgs...

Hello everyone, I have a question that I have spent many nights pondering and hours on my whiteboard considering. I apologize in advance if this question seems a bit elementary, but to me it is something that I believe is all important before I can understand all of calculus. How is...

Hi, I can't go out and measure this system up atm. But I have 36m^3/s flow rate at 400kpa. How would I go about predicting the flow rate at 500, 600, 700 and 800 kpa through the same pipe? I think it's a linear relationship but want to be sure. Thanks.

Consider a set of n numbers, and let their arithmetic mean be X. Suppose a new number Y, is added to the set. Prove that the mean of the new set, with (n+1) members, is between X and Y. I've been trying to prove this the past few minutes, but I think I'm at a dead end. It's a problem that...

This question has bogged me down for hours. Please help. An alloy of metals is found to have a resistivity of 1.2e-6Ωm at 300K. When it is heated to a temperature of 973K, the resistivity is found to increase by 10 per cent. Assuming Mathiessen's rule to hold good for the alloy, find its...

There is an equation relating the tension in a string fixed between two nodes and the velocity of the traveling waves which form the allowed standing waves. It is T = v^2 (μ) where μ is the mass per unit length. Am I correct in saying that if the tension in the string increases then frequency...

I know the following |x|-|y| \leq |x+y| \leq |x| + |y| where does |x-y| fit in the above equation?

Homework Statement The actual value of the capacitor Rahal will receive may be different from the value the catalogue states. The manufacturer guarantees that the maximum percentage difference below/above the catalogue value will be –10% / +50%. Rahal orders one of the 400 V 1000 µF...

Can anyone tell me the relationship between work done and potential difference?? CAN ANYONE TELL ME THE RELATIONSHIP BETWEEN WORK DONE AND POTENTIAL DIFFERENCE?? If more work is being done across a component(for ex due to increased resistance), does the pd across it increase or decrease? I...

I am having troubles finding anything online that reveals the conceptual concerns relating to the probability wavefunction in regards to the travel of a particle and then how that plays into the double-slit experiment. No math is required. I merely need to know the concepts involved. 1) exactly...

Hello, I am a general physicist, pursuing it for fun. I work in solar, and the other day while driving up to Sacramento I had a interesting train of thought. From the data we have collected, one interpretation could be that on average, the universe is expanding in every direction at an...

As I understand it, the absorption coefficient of a surface of material is the same as its emissivity (due to Kirchoff's law of thermal radiation), and that the net of this and the tranmissibility is emissivity + reflectivity + transmissibility = 1 Is this a general statement about...

If the product of pressure and volume over temperature is equal to some constant for a particular ideal gas. Let's say the volume is just a vessel and the pressure in the vessel is increased. So effectively the volume remains the same. Any increase in pressure must be canceled by an increase...

Homework Statement find relationship between the angle and time of a tilted falling object Homework Equations any that is applicable The Attempt at a Solution As seen in picture below, and that's what I have done so far. It's a tilted object, only gavity and the support...

Question, For a given wavelength of light, I have assumed that there will typically exist one photon (on average) per complete wave/peak(This would mean that a train of 5 waves would contain 5 photons). I have also assumed that the photon would most likely be "found" at the peak of the...

Homework Statement Calculate the surface integral ∫∫S x2z2 dS, where S is the part of the cone z2=x2+y2 between the planes z=1 and z=3 Homework Equations There are two relative equations for calculating surface integrals by transforming them into double integrals, but my question is about...

P = \left( \begin{array}{c} E/c \\ \bar{p} \end{array}\right) and U = \left( \begin{array}{c} \gamma c \\ \gamma \bar{v} \end{array}\right) right? But I frequently see in textbooks that P = m_0 U . Surely, m_0 U = \left( \begin{array}{c} \gamma m_0 c \\ \gamma m_0...

I'm looking into the stability of a system of ODEs, for which we've mannaged to extract a Jacobian matrix. Two of our eigenvalues are within our nummerical error tolerance, but they are close to zero. One of them is positive, which poses a problem for our stability analysis. We do know that...

I want to know why the moment could be represented as the product of the bending stiffness and the curvature. I do not quite understand the function of the curvature in the formula. http://en.wikipedia.org/wiki/Curvature

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...

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...