Concepts Definition and 412 Threads

The question is to determine which decays are possible for: i) ##P^0## ## ->\prod## ##^+## ## \prod## ##^-## ii)##P^0## ## ->\prod## ##^0## ## \prod## ##^0## where ##J^p = 0^-, 1^- ## respectively for ## \prod## ##^+##, ## \prod## ##^-## , ## \prod## ##^0## and ##P^0## respectively. For...

Hello, I am working through the MIT OCW courses 8.01 and 8.012. At my university we already learned about tensors in the first mechanics course but I don't really understand them completely. Therefore I am searching for some MIT OCW course that covers tensors. I'd be glad at any help. Apart...

Hello, I am trying to understand the concepts of photometric and radiometric measurements in an electronic sensor. Various photo sensors based on CCD (Charged Coupled Devices) or CMOS photo diode array technology are available in the market for measurements in Visible Spectrum. Now I want to...

I'm new to shocks and trying to get the hang of it. I have 3 sets of characteristic equations,( by a set I mean defined by taking a different fixed value u along the characteristic.) From what I understand,in general talk, we use a shock whenever two sets of characteristics collide as...

I read many articles here about gravity but I can’t find the following specific subject: I need a help to find in this site or any other place, studies or experiments comparing the “virtual gravity” (1G acceleration inside of a spaceship for example) with 1G gravity perceived in the earth. Any...

I've read that they must be calculated in the same frame , and so to calculate them in the easiest frame.. * So for a collision when I compute the momentum before and after I should do this in the easiest frame. Considering a specific collision where we are computing the minimum energy to...

Hello folks, I have doubts about the next concepts in gravitation: Tetrads, dual basis, normal basis, standard basis, local basis, orthogonal basis, FIDO, FREFO, Frames, Diffeomorphisms, Affinne conection, etc.If I am not wrong, "frame" is a general concept of n-tuplets of vectors defining in a...

Hello! I understand that a lot of this may be considered physics, but It is for AP Chemistry. We will likely be required to identify a certain element on the periodic table given a set of quantum numbers of one of its electrons. I understand the primary quantum number, n, essentially...

I didn't know whether to post this here or the homework section. But because this isn't actually homework and there are no questions that require mathematical processes, I thought this would be a better place to post it. Feel free to redirect it to wherever it should belong. So quick backstory...

I feel so frustrated because I could not understand the basics of this topic. My teacher spent like 1 week trying to explain it. I understood the math of capacitors, but I could not understand what an electric potential is. For example, what do you really mean? when you have a capacitor and...

I am going through the tutorial athttp://scikit-learn.org/stable/tutorial/index.html Could anyone recommend a good book that could accompany this so I can gain a deeper understanding of the methods discussed.

Homework Statement What does the following equation mean and how is it analogous to the relationship between the electric field and the the electrostatic force? V ( ~r ) = U ( ~r ) / q In general, confused about concepts, meanings and vocabulary. The naming of different terms in this...

*edited* Just realized that's not what i wanted to ask, sorry. New Question: What is an irreversible adiabatic process? is it when the net q(sys) remains the same but there is heat transferred within the system?

I suspect that Quantum Mechanics' true theory would be understood, at least partly, by what Planck's Constant unified, like how the speed of light in vacuum was derived by Maxwell's unification of electricity and magnetism as two manifestations of one fundamental force. So, if some physics-grads...

Two vectors acting on a moving object that has a mass of 27kg.One force has a magnitude of 12 N and points due south, while the other force has a magnitude of 17N and points due west,find acceleration of the object? Calculate the resultant force acting on the object: RF² = 12² + 17² RF² =...

i really try understand these initial concepts before continue my work, The necessity to use contra/covariants coordinates is ONLY to maintain invariant the module of a vector in a oblique coordinate systems? if not, what the motivations for i really need work with the two types of...

Definition/Summary Force = impulse per time: \mathbf{F}\ =\ d\mathbf{I}/dt. For constant force, impulse = force times time: \mathbf{I}\ =\ \mathbf{F}\,\Delta t (by comparison, work done = force "dot" distance: W\ =\ \mathbf{F}\cdot \Delta\mathbf{s}). For varying force, impulse is the...

I'm making this new post in the general math section since I don't know what field of math this question belongs to anymore. So the picture I currently have regarding the abstractions of integration and differentiation from single variable-calculus to multi-variable calculus is that the...

I tried posting in the education section but was unable to start a topic… Anyways…I'm trying to reteach myself maths from back in the school days in hope of doing a calculus paper at university. I have realized that a lot of books and materials seem to teach you how so l've equations and...

Dear all, I am going to attend masters program in micro and nano technology. I would like to know what concepts of maths and physics I should be clear at and some good textbooks for the same. My study module includes nanoscience, nanomaterials and nano electronic design.

New to programming Java please list out the things I should focus on. What are the key ingredient to programming in Java? Thank You

Homework Statement A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. N is the normal component of the contact force. All quantities below are magnitudes. True or False: 1) If M does not accelerate, then T ≤ μsN...

I've just finished my first calculus-based physics course along with calculus II. Having taken a non-calc-based physics class in high school, I've noticed that the equations behind kinematics, work, energy, etc. become a lot more intuitive with a knowledge of calculus. I was wondering if there...

I just finished up a Calculus class which went into fields, and I learned how to find the curl of the field and also the divergence of the field. What I want to know is what does the curl/div of the field actually show us? Also when you have a field (x,y,z) = (Something)i + (something)j +...

Hi. I did poorly in HS math due to many reasons, but now I love it and have received ~ 100% on every exam in the past 4 remedial math classes. Next I start cc version of precalc. So lately I've been feeling like my cc is teaching us watered down math. For example, logarithms are not introduced...

Hi, I was reading a physics book and started to make some links, but i don't know if it's correct. For example: I need to calculate the power to move a car in a slide with friction. But as far as it's a car pulled by an motor, the motor provides the needes force to keep the speed. I made...

I) is it physically correct to say that something is hot or cold II) if something is cold do you say that it has a high heat capacity or high thermal conductivity

Can some one explain to my why an integer equation that starts with 1 has a -1 at the end of the equation. example: 1 + 2 + 4 + 8 + 16 ... + 2 ^ N = 2 x ( 2 ^ N ) - 1 Conceptually where does the rule come from that there is a minus at the end of the equation. It starts with an odd number...

Hello everyone. I have a rather unusual issue in which I do not seem to some know/understand basic concepts in prealgebra, but do rather well in something like calculus. By basic concepts, I don't mean something like solving equations, but I don't understand why certain things work the way they...

how could you calculate the input voltage at an input impedance from a voltage source? I saw they use voltage division law to find the voltage at the input impedance(Zin) from a voltage source(Vs). They do it like Vs * Zin/(Zin+Zs). The problem came... We all know that we can determine the...

Okay, I am considering a cycle, where the working fluid is an ideal gas, with heat capacities Cv and Cp, the cycle consists of: isochoric increase in volume, adiabatic expansion back to initial pressure and a isobaric compression back to initial conditions. Questions: - q1) I am asked to...

Homework Statement A charge moves towards a positively charged sphere, as it does, it's electric potential (V) increases. Give an instance on when the Electric Potential Energy (Ee) will decrease. Homework Equations V= Ee/q The Attempt at a Solution Alright, This is basically a theory...

So a mobius transformation is defined as \frac{az+b}{cz+d}=f(z). Where ad-bc≠0. My question is just deriving this condition ad-bc≠0. I understand that the condition describes the case were the mapping leaves all points unchanged. This is described as undefined in some textbooks...(why...

So the number of degrees of freedom of a system is defined as the number of dynamical variables required , where the definition of dynamical variables is to completely descibe the configuration -positions of parts of a mechanical system. The system I am to consider is a coin balanced on its...

1) B = (0,1) U {2}, the derived set of B which contains all limit points in B is [0,1], right? 2) B = (0,1) intersect Q,the closure of B is [0,1] too right? 3) a subset of R whose only limit point is 1... Will {1+ 1/n: n is natural number} work? 4) an interval on which the function f(x) =...

Would it be right to say that QFT tries to bring together the many-particles(many-body) discrete systems of quantum mechanics and the relativistic fields that are basically continuous systems? Of course the discrete particle of classical mechanics that when found in big numbers must be dealt...

I've recently learned about the "Tsiolkovsky rocket equation" which can be used to relate initial mass, final mass, rate of fuel change, velocity change, etc.. Except I'm having difficulty applying it to Power. How do you find the instantaneous Power of the engine, fuel, and the total power...

I've read that the reason why X is the unknown is because of a rule in spanish. That is funny to me because we see math as this complex thing and some of its most mysterious concepts have a simple reason behind it. I was wondering if there were more concepts like this that had explanations...

Hello again! This time I have a bunch of multiple choice questions, some of which I'm really not sure on, so I'd really appreciate a little help. Questions I'm really unsure about will be marked in red. In these questions we are to assume g = 10 m/s^{2} unless otherwise specified. "Bobsled...

As we know, the 1d infinite potential well has a stationary state. The function that depends on x onky is a sin function. However, I don't understand the concept in this question. I have the answer of this question and this is not a homework. I am not asking for the answer so please don't put...

I was always good at maths, just because primary/high school math was simple enough to find concrete examples for the abstract concepts, and that helped me a lot on exams. Since then I tried to grasp more advanced concepts. But I always faced with pure overformalized, overgeneralized stuff...

Hi all. I'll starting a little research for my college assignment. But I need to discuss a few concepts in Quantum Mechanics [sorry for my english]. 1. I want to analyze perturbation effect that suffered by an ion. Is Rayleigh-Schrodinger theory suitable for this problem? if not, which...

My mechanics prof today said when setting GMm/r2 = ma, the canceling of the small m is actually a bit nuanced because you have to assume the gravitational mass is equal to the inertial mass (though it's supported by experiments). I'm so used to seeing mass as just mass so I'm having a bit of...

I just started Physics 1 this semester. Although the kinematics we covered so far were simple, our teacher didn't do a particularly good job at explaining dynamics. In fact, all 10 students I talked to were left clueless by his lecture. What we don't understand at this point is the concept...

I am presently undergoing a course in Classical mechanics, here are some mathematical concepts that i haven't understand properly, These are the concepts 1) Tangent, normal , Radius of curvature of a vector function at a point 2) spherical, polar and cylindrical co-ordinates 3) taylor...

any suggestions for books/authors which contain these topics. Fundamental Concepts Of Mathematics Algebra of sets and logic; methods of proof; functions and relations; logical nature and structure of mathematics; introduction to number-theory; algebra arid geometry of complex numbers

I've been puzzling over things I've read about quantum physics as it relates to reports of things "seen" and the nature of the concepts/semantics/assumptions involved. If this sounds vague its because my thoughts are not fully formed on this. Some detail: In a new article titled: "Physicists...

Can someone explain what the expansion, rotation, and shear of a time-like congruence are physically?

1. 1. Two charged spheres,10.0cm apart,attract each other with a force of magnitude 3.0 x 10^-6 N. What force results from each of the following changes, con- sidered separately? (a) Both charges are doubled, while the distance remains the same. (b) An uncharged,identical sphere istouched to one...

I am confused about what I think should be the most basic concepts in quantum mechanics.. As far as I understood, a system that can be in only one of two states, can literally be only in one of those two states, right? So if I were to make a hypothetical measurement of the configuration of...