State Definition and 1000 Threads

Ondo State is a state in southwestern Nigeria. Created in February 1976 from the former Western State, Ondo State borders Ekiti State (formally part of the state) to the north, Kogi State to the northeast, Edo State to the east, Delta State to the southwest, Osun State to the northwest, and Atlantic Ocean to the south. The state's capital is Akure, the former capital of the ancient Akure Kingdom.
Nicknamed the "Sunshine State", Ondo State is the 18th largest state in the country. The state is predominantly Yoruba, and the Yoruba language is commonly spoken. The state economy is dominated by the petroleum industry, with cocoa production, asphalt mining, and activities utilizing the state's extensive coastline also serving as major economic factors.

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  1. amjad-sh

    Proving Bound State Exists for V(x)=-aV_0δ(x)

    Homework Statement Consider V(x)=-aV_{0}δ(x). Show that it admits a bound state of energy E=-ma^2V_{0}/2\hbar^{2}.Are there any other bound states?Hint:solve Schrodinger's equation outside the potential for E<0, and keep only the solution that has the right behavior at infinity and is...
  2. KastorPhys

    I Representation between State Vector & Wave Function

    By the Principle of Superposition, a state vector can be defined as pic.01 also, the state vector can represent a wave function in a continuous case as pic.02 My (1) question is, in pic.03, why the state vector can be pulled out from the integral? I have an idea but I think it should be...
  3. websterling

    I Fermilab announces new tetraquark state

    Nearly five years after the Tevatron was decommissioned the experimental collaborations are still analyzing data and today Fermilab announced that DZero discovers a new particle consistent with a tetraquark This candidate is different from previous discoveries in that it contains four...
  4. M

    Morehead State -- Space Systems Engineering MS

    Hi, I was just accepted to this program and was wondering if anyone has had any experience with it. It seems quite rigorous, but my main concern is that I know little of the school. The research looks quite interesting and I know that Kentucky is injecting large amounts of funding to the local...
  5. M

    Schools How good is the Ohio State University at high energy physics

    OSU ranks 31 according to ARWU-Physics-2015 and 25 according to US News/Physics. That sounds good enough, except for two facts which I want to be clarified. 1) According to gradschoolshopper.com the acceptance rate at OSU-Physics PhD in Fall 2015 was 35%, which seems quite high for a school of...
  6. samjohnny

    Electron Configuration of Excited State

    Homework Statement An exercise examining the tin atom (Sn). Tin has a ground state electron configuration of ##[Kr]4d^{10}5s^25p^2##. a) Write down the electronic configuration of the first excited state. b) Illustrate with a vector diagram the allowed total angular momentum ##J## values for...
  7. andrex904

    Single particle state and symmetry

    Known that $$ [Q^a,p^\mu]=0 $$ where Q is a representation for the a-th generator of the algebra of group symmetry and p the 4-momentum, if we consider a single particle state, eigenstate of p $$ p^\mu | \psi_A (k) > = k^\mu | \psi_A (k) > $$ then also $$ Q^a | \psi_A (k) > $$ is...
  8. B

    Find probability of spin state after certain time.

    Homework Statement Question: http://imgur.com/YzexPKl (only part c) Homework Equations From part a) I got |psi> = (1/sqrt(2))(e^(iwt/2)|z-up> + ie^(-iwt/2)|z-down> I expanded this wave function in the x-spin basis and got, |psi> = (1/(2))[(e^(iwt/2)+ie^(-iwt/2))|x-up> +...
  9. durant35

    I Can Decoherence Create a Superposition of Life and Death?

    Hey guys, this is my new thread regarding the problem of decoherence combined with the Schrodinger's cat experiment. If somebody has the patience and isn't annoyed (which is perfectly understandable) I hope that I will get an appropriate answer. So basically I've read Lindley's where does the...
  10. jdawg

    Thermodynamics: Dead state assumptions

    Homework Statement Im having a little trouble with knowing what to assume for the dead state! In the question that I posted, I don't understand how they knew to assume that the water in the system is a super heated vapor? Or how they knew that the dead state is a compressed liquid? Homework...
  11. G

    Solid State Electronics: Is It Worth Pursuing?

    I am just finishing my A.S. in Electrical Engineering Tech. and am looking into bachelor programs. I want to double major in EE and physics. At the University of Iowa they have an applied physics program with a concentration in solid state electronics. I was wondering if solid state...
  12. kartmaze

    Steady State Flow out of a Tank Through a Vertical Pipe

    This is not homework, but something work-related. However, I will post it here since it's homework-relatable. 1. Homework Statement Known variables: Qin , A (and obviously the diameter D of the pipe as well as g = 9.81 m/s2). The pipe outlet and the top of the tank is at atmospheric...
  13. DrClaude

    Quantum state vector and physical state

    Interesting new work on the link between quantum state vectors are physical states: Can different quantum state vectors correspond to the same physical state? An experimental test Daniel Nigg et al 2016 New J. Phys. 18 013007 Abstract A century after the development of quantum theory, the...
  14. Z

    Stat Mech, question about average of function of ith state.

    I just started learning some Stat. Mech by Leonard Susskind's lectures and am in a part briefly overviewing basic probability in general; One of the things brought up was F(i), some quantity associated with the ith state of a system, and the important average of F(i) averaged over the...
  15. S

    Using expm of matlab to plot state responses

    Homework Statement The state space model of a nonlinear system is x'_1(t) = 2x^2_2(t) - 50 x'_2(t) = -x_1(t) - 3x_2(t) + u(t) where x_1(t) and x_2(t) are the states, and u(t) is the input. The output of the system is x_2(t). Find the zero input response (u(t) = 0) of this system linearized at...
  16. Useful nucleus

    A Nonhydrostatic equation of state for a solid

    I could find many equation of states for solids under hydrostatic compression such as Birch-Murnaghan and Vinet but I could not find any derived equation of state for non-hydrostatic case. Are there any texts or papers that discuss such equations of states in some detail ?
  17. M

    Helium singlet/triplet state with total spin of 1

    Say we have a Helium atom with the first electron in 1s orbital and second electron in 2s orbital, and if these electrons have parallel spin so that the total spin of the system is S=1, then is this a triplet or a singlet state? According to LS coupling, multiplicity is defined as: 2S+1 (if...
  18. P

    Oregon State VS Arizona State for physics undergrad?

    I'm an international transfer student applying for UW Madison, Arizona State and Oregon State. My first choice would be Madison, but if I'm not accepted there, I'm going to one of the other two. The problem is, I'm not sure which has a better physics program. The rankings put Oregon state...
  19. A

    Finding the state space model of a nonlinear system

    Homework Statement The state space model of a nonlinear system is x'_1(t) = 2x^2_2(t) - 50 x'_2(t) = -x_1(t) - 3x_2(t) + u(t) Where x_1(t) and x_2(t) are the states, and u(t) is the input. The output of the system is x_2(t). Find the state space model of this system linearized at the...
  20. K

    How does negative feedback affect op-amp response?

    Hello, I have two questions about feedback. 1. If we look at the equation above, it says G(Vin-BVout)=Vout but this equation is actually,G(Vin-BVout1)=Vout2 whereas Vout1 is Vout for first iteration and Vout2 is Vout for 2nd iteration. Therefore, they must have different values. How can we...
  21. K

    Is the Bound State of a Particle in a 1D Potential Energy Well Real or Complex?

    is the bound state of a particle in a one-dimensional potential energy well real or complex?
  22. Captain1024

    Engineering Analysing a 3-Loop RLC Circuit and Finding State Equations

    Homework Statement Obtain the state equations in Matrix form for the two-input and one-output circuit shown in the figure below where the output is i_2. Homework Equations Ohm's Law, KVL, KCL The Attempt at a Solution Currents i1, i2, i3 assumed clockwise. Is there a better assumption I...
  23. F

    Effect of spins on hydrogen atom ground state energy

    What do you think about Feynman's description (http://feynmanlectures.caltech.edu/III_12.html#Ch12-S3) ? It seems to be inconsistent with hyperphysics (http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/h21.html).
  24. Adoniram

    Nearest Neighbors in solid state, but with basis

    Homework Statement What is the area of the primitive cell for the lattice shown below? The nearest neighbor separation is "a." Homework Equations Here's the lattice we were given on our handout, and I have added the lines to indicate the square lattice (in red), the basis (in purple), and...
  25. teroenza

    Approximating H Wavefunction Circular State for Large n

    1. Homework Statement We are studying circular states of the hydrogen atom (states where the l quantum number is = n-1). We are asked to evaluate \langle \Psi_{n,n-1,n-1}| r_{n,l=n-1}|\Psi_{n,n-1,n-1}\rangle . The wave function is that of the hydrogen atom, and the thing we are taking the...
  26. S

    How Do Resonances Differ from Virtual States in Quantum Physics?

    What´s the difference between a resonance and a virtual state? For comparison, a standard moderately lived state, hydrogen 2p state, has energy of 10,2 eV above ground, and width 4*10ˇ-7 eV. An example of resonance is Delta - with mass 1232 MeV, it´s energy is about 290 MeV above ground...
  27. C

    Why do the off-diagonal terms not matter in density matrices?

    can all quantum state be entangled without any exception even if their phases don't coincide? is the term to call this mixed state entanglement accurate? does it have to do with Fourier addition? this is related to environmental entanglement... when you are shaking hands with another person...
  28. Andreol263

    Solid State What would i need to begin in Solid State?

    What are the physics requeriments? and which book should i choose to begin to study?
  29. D

    Understanding Pure and Mixed Quantum States in Entanglement

    Quick Question. I've recently been told that a pure quantum state is the only state that can be entangled in quantum entanglement and display the results that is predicted with QM. The mixed states would lose their superposition immediately after entanglement. Is this true?
  30. T

    Ground state energies and potential

    How to compare the ground state energies if diagrams containing x vs V are given. I saw a problem containing diagrams three potentials and they have asked to arrange them in order of their ground state energies. One was a potential well, and the other two had small perturbation in the middle...
  31. O

    Steady state temp. distribution

    Homework Statement Homework Equations ıt is nonhomog type ,2D heat conduction problem The Attempt at a Solution I don't understant To parts so I couldn't attemp a solution.
  32. Cora

    Ideal Gas Expansion State Properties & Exergy Balance

    Homework Statement Two well-insulated rigid tanks of equal volume, tank A and tank B, are connected via a valve. Tank A is initially empty. Tank B has 2 kg of Argon at 350 K and 5000 kPa. The valve is opened and the Argon fills both tanks. State 2 is the final equilibrium state. The temperature...
  33. N

    Penn State PHD -- What am I expected to know before Fall semester?

    My question is directed at anyone who currently is enrolled or was enrolled in Penn States PHD program as well as any faculty. Any other advise though would of course be appreciated. I was wondering what am I expected to be proficient in or to know prior to me starting in the fall semester...
  34. Suman Saha

    Solid State Advanced Solid State Physics Book: A Modern Alternative to Kittel and Ashcroft

    I found Kittel very complicated and Ashcroft outdated. I want something rather new, written in a advanced but familiar manner.
  35. F

    Why does some reactions do't go to the fundamental state?

    Hi everybody, after studyng a little bit of nuclear physics I have noticed that many reactions (α,β,γ...) end with the new particles in excited states which rea¡main in those for a little time before going to the fundamental. I don't know why this happens instead of going directly to the...
  36. M

    How can electron in hydrogen ever get in the 2s state?

    I am trying to understand selection rules in atomic transitions. So, one of the selection rules says that only transitions where orbital quantum number is changed by 1 are possible. If that is the case how can hydrogen in ground state get to 2s state? Can we detect spectroscopic line that...
  37. Y

    Heat Capacities Given Equation of State

    Homework Statement Given the equation of state ##V(P,T)=V_1\cdot exp(\frac{T}{T_1}-\frac{P}{P_1})## where ##V_1\;,T_1\;,P_1## are constants: a. derive an equivalent equation ##P(V,T)##; b. given ##C_V=DT^3## where D is a const, calculate the entropy of the system ##s(V,T)## up to a const; c...
  38. Monsterboy

    What is the State of Water in a Rigid Container at 120oC?

    Homework Statement A rigid container of volume 0.5 m3 contains 1.0 kg of water at 120oC (vf= 0.00106 m3/kg ,vg=0.8908 m3/kg ) v-specific volume (vf is v of saturated liquid and vg is v of saturated vapour) The state of water is (a) compressed liquid (b) saturated liquid (c) a mixture of...
  39. S

    State postulate for incompressible substance

    State postulate for a simple compressible system is completely specified by two independent intensive properties. But what about state postulate for a incompressible system. Why it is not so important?
  40. C

    Definitive measurement that determines state of matter?

    What is an (the?) empirically demonstrable method used for determining a substance's state of matter? If a new substance was discovered and scientist A said it's solid and scientist B said it's a liquid, how would it be demonstrably proven to be one or the other? The books I have define states...
  41. J

    Density Matrix and State Alpha

    There is something that I don't quite understand or want clarification. See John Wheeler article "100 years of the quantum" http://arxiv.org/pdf/quant-ph/0101077v1.pdf refer to page 6 with parts of the quotes read "so if we could measure whether the card was in the alpha or beta-states, we...
  42. S

    Solving Erbium's Ground State w/ Hund's Rules

    I have the solution for this problem but don't understand it. 1. Homework Statement Use Hund's rules to calculate the ground state of erbium with electron configuration [Xe]4f126s2 Homework Equations Hunds Rules: 1. Maximise S (within Pauli) 2. Maximise L (within Pauli) 3. Min J (for...
  43. B

    What is the energy of a hydrogen atom in a mixed state?

    Suppose a single hydrogen atom is in mixed state. Ψ=(1/√2) Ψ_100+(1/√2) Ψ_200 Then energy will be E=(1/2)*13.6+(1/2)*(3.4)=8.5 eV. But there is no spectral line at 8.5 eV.
  44. A

    Admissions Do i need to state i'm applying to their program?

    Hello, I am in the process of applying to graduate schools and most of them request either a letter of motivation or letter of intent. After looking at many examples i have noticed almost all of them start with a paragraph explaining who they are, the university they are coming from, their major...
  45. E

    Fidelity between a pure state and an arbitrary state

    \Homework Statement Show that the Fidelity between one pure state |\Psi\rangle and one arbitrary state \rho is given by F(|\Psi\rangle , \rho)=\sqrt{\langle\Psi|\rho|\Psi\rangle} . Homework Equations The quantum mechanical fidelity is defined as \begin{equation*}...
  46. J

    Birth and death process -- Total time spent in state i

    Homework Statement Let X(t) be a birth-death process with parameters $$\lambda_n = \lambda > 0 , \mu_n = \mu > 0,$$ where $$\lambda > \mu , X(0) = 0$$ Show that the total time T_i spent in state i is $$exp(\lambda−\mu)-distributed$$ 3. Solution I have a hard time understanding this...
  47. Z

    Hydrogen atom ground state wave function complex conjugate

    For hydrogen atom ground state we know φ=π-1/2a-3/2e-r/1 I want to know the complex conjugate of φ* ?
  48. A

    How to calculate the state vector after n-transitions?

    Homework Statement Given an initial distribution state vector that represents the probability of the system to be in one of its states. Also given a Markov transition matrix. How to calculate the state vector of the system after n-transition? Homework Equations Assuming the initial state...
  49. C

    State Space Control Theory Controllability/Observability

    I'm studying for an upcoming final and this is a question from a practice exam we were given. It looks simple but for some reason I just can't wrap my brain around it. The question is attached and gives a state space representation of a system (A, B, C matrices) and asks what part of the system...
  50. kroni

    Nonlinear equation and state superposition

    Hi, In quantum physics, solution of Shrodinger equation live in a Hilbert space which is a vector space. The state superposition is obtained by mixing solution of the équation which is LINEAR so a linear combination of solution is a solution. Now i have a non-linear equation of a scalar field...
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