Relationship Definition and 999 Threads

Hey guys, First off, I apologize if this is in the wrong section. I am currently an intern taking 6 months off from my senior year pursuing a mechanical engineering degree. Having not taken a heat transfer class yet, I am stumped as to how to go about tackling my latest project. Basically...

Homework Statement a) Find the speed of the boat with respect to the Earth. (km/h) b) Find the speed of the boat with respect to the river if the boat's heading in the water is 60° south east (km/h) Homework Equations v(x) = v cos(θ) v(y) = v sin(θ) v = √(vx^2+vy^2) but can't use it in...

Hello, I am wondering if anyone knows any correlations or equations that can give me the temperature of a wire due to power losses. I understand how to calculate the power loss in the wire, based on wire resistance and current (P=I^2*R) but how do I turn this into a heat transfer problem and...

Relevant equation: PV = nRT Attempt: P1/P2 * V1 / V2 = T1/T2 V1/V2 = 4.2E12 / (1E12 - (6371.5 + h^3)

Homework Statement This is actually a part of my physics lab assignment, but there isn't any physics involved here, so I chose to post this here. I hope that isn't a problem. Anyway, I've been given three data tables, and have been asked to make graphs for each of the data tables by hand...

Hello, this was another question on the exam which I wasn't sure about: Let f and g be entire such that |f(z)| \leq |g(z)| \ \forall z \in \mathbb{C}. Find a relationship between f and g. I'm kinda lost on this one... Thanks!

Homework Statement Hello! I have a problem where I need to develop and justify a hypothesis surrounding the relationship between the thickness (or diameter) of a nichrome wire and the temperature of water that it's submersed in over a time of 5 minutes. (proportionality statement and...

Homework Statement A bridge has two arches, with one abutment in the center labeled A connecting the two arches, and a point b on the right. I have calculated that the maximum bending moment in the structure would be at point A, right on the abutment that is connecting the two arches. I am...

Weight, normal force, applied force, and friction force. a. A homeowner is applying southwest force on a lawn mower, friction force is going to the East, normal force is North, weight is South. This was a multiple choice question and the answer was Applied force > Friction force and...

Obama Misspeaks on Egypt Relationship... Or does he...? http://security.blogs.cnn.com/2012/09/13/what-to-call-egypts-relationship-with-the-u-s/?hpt=hp_t2 But... A cynical person might say Obama was lying, since official US policy is his and he directly contradicted it. Considering the...

Homework Statement Show that: A \cap B \subset (A \cap C) \cup (B \cap C') Homework Equations The Attempt at a Solution I tryed distribute (A \cap C) over (B \cap C') but I'm always walking in circles and i don't came to a satisfactory answer. This exercise was in a section...

theory and experiment relationship. your thought?? just general question about engineer. what do you think of the relationship between theory and experiment? what is a good experiment or bad experiment? is there something that important to you? can you share your thought when you were in college?

Is the relation v_{\varphi }v_{g}=v^{2}=\frac{1}{\mu \varepsilon } always true in a plasma ? Where v_{\varphi }, v_{g} are respectively the phase and group velocity of the electromagnetic wave that is propagating in the plasma.

I'm just experimenting with graphs of derivatives and have noticed something that our teacher has never adverted to but strikes me as very interesting: the third derivative when set to zero will give the inflection points of the first, which makes me reflect that the relationship which...

Like 85% of people who applied to the University of Washington's Computer Science program, I was rejected and am now going into my Junior year without a major. Last quarter, I took the first introductory EE class and found it pretty enjoyable. As much as I like the idea of going with EE as a...

Homework Statement http://img15.imageshack.us/img15/1671/capturetwy.png The Attempt at a Solution Could someone please explain what is meant by "if v is constrained to 0"? Also how do you find a relationship between two axis of different coordinate systems? I really have no clue where...

Relationship between "Bohmian trajectories" and "Feynman paths"? Can someone summarize what (if any) relationship there is between these two? I've read that Bohmian trajectories are very different than Feynman paths but I've also come across papers suggesting that "Feynman method of summing...

I know that the Higgs boson gives particles their mass. I know that there are two kinds of mass: inertial mass and gravitational mass. I know that the Higgs boson gives the inertial mass, but is there a relationship between it and gravity? If so, what is that relationship? As far as I know...

Gravity -- relationship with Electromagnetism? Hi all my interest in Physics is purely a hobby and I have to say I have gaps in my knowledge but even then I have a question is it possible that the wave and particle nature of electromagnetic waves and small particles are related to gravity...

Homework Statement The relationship between the current in an N-turn coil and the flux created by it is given as: \Phi = \frac{ai}{b+ci} Determine the energy stored in the coil when the current varies from 0 to I. Homework Equations W = N \int{i d\Phi} The Attempt at a...

Is this "theorem" true? Relationship between linear functionals and inner products Suppose we have a finite dimensional inner product space V over the field F. We can define a map from V to F associated with every vector v as follows: \underline{v}:V\rightarrow \mathbb{F}, \ w \mapsto \langle...

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