Significance Definition and 264 Threads

Well as the topics says I need a clarification why do we need the so called boundary conditions? I have seen it in electostatics, magnetostatics etc. I tried in many ways to get that stuff into my head, but its just only banging my head not getting into.. I really wana know what is that and...

I am a little confused about the meaning of pH, especially when you have a basic solution. I know that pH = -log[H^{+}] , but I don't understand how you can have a pH for a basic solution. Don't basic solutions only produce hydroxide ions? I know that pH + pOH = 14 but why this equation be...

Hi! As I understand it, Quantum Information Theory is an attempt to apply the Classical Information Theory (i.e 0's and 1's) into the Quantum realm of superpositions. I recently came across a fascinating interpretation of QIT wherein it was described as possibly the law that effectively...

or you can say what is the physical interpertation of torque. i know the mathemetics of it but what's its significance in practical terms.

Hi folks, I have what I think is quite a basic question, but I'm looking for options. So, I have data that consists of a set of numbers (this is not a set theory question) - each number can be ascribed to one of two groups (the source of the number). Now, I have knowledge of the source...

Dear friends In quantum mechanics what is the physical significance of normalizing a wave function? Thanks in well advance

I recently came across the NS millennium problem and I read that uniqueness for the NS equations is unknown. I have two questions. First question, if solutions are found to be non-unique, would the NS equations have to be corrected? Second question, since uniqueness is unknown, if someone...

Hi, I was searching the forum about comparing continuous probability distributions and came across this post back in 2005. "You could make two variables X(t) = value of the "true" disrtibution (expensive simulation) at point t and Y(t) = value of the alternative dist. (practical simulation)...

Homework Statement Let y = s(t) represent the number of students who have contracted measles at time t (days). Give an interpretation for each condition: e) s' = 0, s" > 0 The Attempt at a Solution This seems counterintuitive to me, to think that the second derivative is also not...

Homework Statement why we do use commutation? what is physical difference between commutators and Poisson Brackets? Homework Equations The Attempt at a Solution

Hi, could someone please explain the equation to me (its significance, application and the how the equation itself works) in simple terms? I find most other resources too complex for me to digest. I hope this is not too much to ask.

please let me know what is a significance of lorentz factor,and what will happen if lorentz factor is not multiplied in the time equation of lorentz transformation.

i know that del.v=divergence of vector v and del x v=curl of vector v can anyone justify for the same? how dot product is physically connected to divergence property?

vaccine may contain attenuated microorganisms, killed microorganisms or toxoids. Certain vaccines contain attenuated forms or killed forms or toxoids. For example, in case of cholera, rabies, hepatitis B, Japanese encephalitis, we use killed form. Why can't we form attenuated forms here? Is...

Homework Statement You wish to test whether or not a coin is fair, so you toss it 400 times and obtain 225 heads. Test the null hypothesis that the coin is fair and balanced against the alternative that it is not. Use the 5% significance level. a.) Identify(using symbols) the null and...

Significance of "En-route" Masters? I am a first year Ph.D. student in Optical Science & Engineering. I have a B.S. Physics (Honors). I started doing research in Jan. of 2009. I started the Ph.D. program in Jan. of 2011. Currently I am still doing research for the same Prof. I started with in...

Though I've learned gauge transformation for a while, I can't figure out why it is significance in describing fields? For example, why electromagnetic tensor has to be gauge invariant? What does it physically mean?

Homework Statement Why are prime ideals so important? Homework Equations The Attempt at a Solution

Well, we basically did a lab where we found the formula of Copper(II) Sulfate xHydrate (Found it was Penta after the calculations), and I've come to the final question of my lab. "What is the significance of finding the formula of a Hydrate." I really have no clue to be honest, and was hoping...

Dear Colleagues, I would like to submit to your court the article in which we attempt a physical analysis of living matter. Biology is a very difficult field for physics as a result errors are very likely. We would appreciate guidance on possible errors. Prokhorenko DV and Matveev VV. The...

The difference between Enthalpy and Heat transfer is the term [FONT="Book Antiqua"]vdP as [FONT="Book Antiqua"]dH-dQ=vdP What is the physical significance of the term [FONT="Book Antiqua"]vdP? :rolleyes: Wherever an article describes the difference between enthalpy and heat transfer, it is...

I have a Question: When the imaginary unit, i, is factored with time, t, in the Lorentz Transformation, or when the Hamiltonian is factored (as when Dirac created his Creation and Annihilation Operators,) and i is factored with the momentum, p, the iFactor is always factored with time, energy...

Instead of using a sieve to remove non-primes from the sequence. 6x-1 x =0 to x=n 6x+1 x=0 to x= n What if you calculate and remove the non-primes. I have determined how to calculate the non-primes in this set. By subtracting them from the entire set you are left with all primes. I find this...

lets say i have a plane equation x + y + z =6 then i know the normal vector is 1 ,1,1 right? but what does the 6 tells me on the RHS of the equation? since it is essentially ()x + ()y + ()z, where () is any point on the plane 1)does it mean that i can fit anything into the () as...

"For low power transistors (under 1 W), the current gain is typically 100 to 300. High power transistors (over 1 W) usually have current gain of 20 to 100." — Electronic principles by Malvino I want to understand why the current gain is high for low power transistors and why it is low for...

http://www.vindy.com/news/2010/dec/29/registry-selects-25-films/ •Airplane (1980) •All the President’s Men (1976) •The Bargain (1914) •Cry of Jazz (1959) •Electronic Labyrinth: THX 1138 4EB (1967) •The Empire Strikes Back (1980) •The Exorcist (1973) •The Front Page (1931)...

I have three question regarding the electronic wavefunction \Psi Ques 1 What does value of wavefunction of any orbital signify ? Is it just a mode of calculating other quantities like probability amplitude etc. or does it have a significance in itself ? Ques 2 What does the...

So i am almost 3/4 through elementary analysis but i seem to be unable to comprehend the basic definition of convergence of series this is how the defn goes. A sequence (sn) is said to converge to a real number s provided that for each ε > 0 there exists a number N such that n>N implies |sn...

Does the mathematical exp (Fa-dp/dt).dr = 0 Fa being applied force, p being momentum, dr being virtual displacement simply mean that the mechanical system will be in equilibrium if the constraint forces do no work? Can someone elaborate on what a dynamic equilibrium means and how it...

What is the significance of the number 137 in quantum physics?? What is the significance of the number 137 in quantum physics??

Hello, everyone. Please excuse my English since its not my native language. I'm a college freshman about to major in Physics (shifting from M. E.) and while in M. E. I've had this problem of playing computer games in between classes with my peers. Many times I would think of refusing but since...

I've just done a textbook exersize to calculate (H,x) and ((H,x),x) for H= p^2/2m +V. Having done the manipulation, my next question is what is the significance of this calculation. Where would one use these commutator and double commutator relations?

I understand how the formulas for classical electron radius are derived.. but what significance does the classical radius really carry? Obviously it's not really the size of the electron. So what does it mean?? Thank you for any help... Sorry, I'm new to this stuff.

As the title suggests, what is work? Or, what is the physical significance of work? My textbook define work as crossproduct of force and displacement. But why do we need that quantity?

i do not understand what is the physical significance of wavenumber. i have a plot with wavenumber on x-axis and count on the y axis. what does the plot mean, how can i relate to a practical example. please help

This pertains to the quantum mechanics of angular momentum, so I'll ask it here: If operators A and B commute, does it follow that (i.) all of A's eigenvectors are eigenvectors of B and vice versa, or that (ii.) merely some of them are? According to Gillespie (see below) the...

Using t-tests to get "trials until significance"? Hi all, I am stumped on how to achieve this with the data I have. My PI thinks there is a way, but I can't seem to find it. We want to see whether we should go ahead with this experiment or if it will take too much time. Basically, I have 2...

Hi I would just like to ask a few questions bugging me. 1. Why do we regard a photon as having no-rest mass. Is the fact that a photon is 'never' at rest enough of a reason. 2. Why don't we take the photon into consideration when dealing with the gamma factor. 3. Our most sensitive...

Homework Statement what is the physical significance of wavelength (not the definition)? Homework Equations suppose, in photodetectors (like avalanche or p-i-n photo diodes) incident light having more wavelength, penetrates more in the diode (particularly in depletion region : )...

Various chemical formulae for the composition of superconductors quote the oxygen content, ie the number oxygen atoms present, as say Osub(10-delta). I would like to know the significance of delta.

Homework Statement What is the significance of Fermi Temperature? Homework Equations I know it is the ratio of the Fermi energy (or the chemical potential at the Fermi energy) to the Boltzmann constant. The Attempt at a Solution What does it MEAN? I've worked out the Fermi...

Hi, I'm not sure how to word my question, so I will just state it upfront. What is the importance of \upsilon = \sqrt{2gh} in physics? I've seen it in escape velocity problems, though with an R instead of h. I've seen it with conservation of momentum applications, and it's similar to PE...

Homework Statement A group of psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests. Two of these tests were significant at the 5% level. Suppose...

Dear fellow Physicists, I am writing to ask what the significance of the term (L/E) in neutrino oscillation is? From my initial understanding it determines the oscillation mode, so if you have an experiment of a baseline of 300km, you can adjust the neutrino beam energy to suit the particular...

I am aware that the commutation relation between conjugate variables shows that one quantity is the Fourier transform of the other, and so to imply the Heisenberg Uncertainty condition. So for example, the commutation relation between x, p (position and momentum respectively) leads to a non-zero...

Does the Bell inequality confirms the quantum mechanics? If answer is yes, why the violation of Bell inequality is more famous?

Hi people, Firstly I want to state that it will be my first message in this forum, I am new around here. I am studying electronical engineering, second year student. I am kind of interested in nanotechnology, hence I am trying to add the course whose name is "Material Science and Technology"...

This is not a homework problem, I'm going over some notes and seem to have a discrepancy. In a local region with no charge, del.E=0. Since the divergence is zero, there are no sources and sinks (ie charges). In my notes I have; "In cartesian co-ords, a solution of del.E=0 is a uniform...

Magnetic diffusivity is a term that appears in the induction equation, when we deal with plasma fluids. It has units of meter squared per second. I am unable to figure out what does the diffusion of plasma as a fluid implies.. It has something to do with magnetic field interacting with the...

I was wondering is there any way to quantify how much "power" a given selection has on the final outcome of a voting. More specifically, say you have a sample 330,000 people and you need to pick one. However, before you get to make a choice a pre-selection is applied and the sample is narrowed...