Advanced Physics Homework Help Forum

Free advanced physics homework help via qualified mentors. Upper undergraduate and graduate level. Please use the template when requesting help and show your work.

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Trace of a subsystem of a two qubit system

  • Haorong Wu
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Why are the E-L-Equations the Same Old Song in the Music Industry?

  • ManishN
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Applying LSZ reduction - scattering particles - quantum theory

  • binbagsss
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Diatomic Molecules: Properties & Examples

  • srecarey
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Initial Value Equations out of ADM formalism

  • TerryW
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3
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16

Potential at the origin due to an infinite set of point charges

  • SherlockHolmie
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16

Understanding the Maxwell Stress Tensor

  • JD_PM
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How Do You Express the Tensor Product of Hamiltonians?

  • Woolyabyss
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How to Determine D, H, and β in a Region with Given Parameters?

  • lord_sphinx
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Visualizing & Solving a 2D Laplace Eq problem (Polar Coordinates)

  • majormuss
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Why the magnetic field doesn't have to describe a circle?

  • JD_PM
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Average speed of molecules in a Fermi gas

  • Silicon-Based
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How Does Coulomb Repulsion Affect a Fermionic Two-Level System?

  • Selveste
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Magnetic Monopole: Reason Behind Faraday's Law Counterpart

  • dRic2
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The Eigenfunction of a 2-electron system

  • Settho
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[Work check] Parametric frictionless wire

  • Zinggy
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How to find the decay rate of processes: a→ b+c

  • Jamiemma1995
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Doubt about a unit vector in toroidal coordinates

  • Ark236
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Friedmann's equation for a^3 with Λ, ρm

  • QuarkDecay
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What is the principal moment of inertia tensor for a lamina?

  • LeoChan
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How to Calculate the Recessional Velocity of a Galaxy 500 Mpc Away?

  • James Beedy
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Calculate potential form poisson equation

  • Kosta1234
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How to deal with a circular light boundary conditions

  • Othman0111
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Question about Fermi energy and heat capacity of a Fermi gas

  • Clara Chung
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2
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Qualitative question about the Stark effect

  • Clara Chung
  • · Replies 9 ·
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How to find von-Klitzing constant based on graph?

  • john chen
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How Is the Second Term Derived in the 2D Riemann Curvature Tensor?

  • Woolyabyss
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Electrodynamics: Vector Calculus Question

  • majormuss
  • · Replies 8 ·
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8
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Where Did I Go Wrong Solving the Inflation Model Integral?

  • QuarkDecay
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Geodesics and Motion in an EM Field

  • Woolyabyss
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Question about differential cross section

  • Clara Chung
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What is the branching ratio for alpha decay to Pu-237?

  • Dant_li
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[Griffiths ex4.2] Electric field of a uniformly polarized sphere

  • peguerosdc
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How to calculate the axial components for a helix?

  • needphyshelpalways
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How Do You Integrate sin(2kz) from Negative Infinity to z?

  • amjad-sh
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Show that this Equation Satisfies the Schrodinger Equation

  • Zinggy
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What Potential Should Be Used for Energy Stored in a Charged Sphere?

  • Kosta1234
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Density matrix of an ammonia molecule

  • Lebnm
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Oscillation of a driven RLC network

  • Miles123K
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How to use the Bremsstrahlung flux to analyse a medium?

  • mjda
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Potential energy of a shell and a disc, both covered uniformly with charge

  • Gursimran Singh
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Equation of state for a real gas

  • WWCY
  • · Replies 7 ·
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Green's Function for a harmonic oscillator

  • TheBigDig
  • · Replies 9 ·
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Work check and advice on a statistical mechanics problem

  • Clara Chung
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Nucleon-nucleon scattering; why can we assume ##l=0##?

  • JD_PM
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Understanding Energy Levels and Transitions in Magnetic Fields

  • ABlibo
  • · Replies 5 ·
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The Lagrangian for a piece of toast falling over the edge of a table

  • Markus Kahn
  • · Replies 5 ·
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Second Virial Coefficient, numerically

  • Selveste
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Square wire in a cylindrical magnetic field

  • Konhbri
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Traveling Wavefunction: Differentiating & Relating $\Psi$

  • Spylock
  • · Replies 2 ·
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Statistical mechanics problem about a paramagnet

  • Clara Chung
  • · Replies 10 ·
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How Do You Determine Heat Capacity for Liquids?

  • Joseph Rolls
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Circulation of water in a cylindrical reservoir

  • RiotRick
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Tensor Force Operator Between Nucleons: Spin & Position

  • kelly0303
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Lagrangian and Equations of Motion for Conical Pendulum

  • Mason Smith
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Dirac delta function of a function of several variables

  • amjad-sh
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Proving Even Parity for this Expression

  • Markus Kahn
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Understanding solutions of Dirac equation

  • Markus Kahn
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Find ψ(x, t) and P(En) at t > 0 infinite well

  • rkdaniels
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What is the area element of angular distribution of charge?

  • Kosta1234
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ADM field Lagrangian for a source-free electromagnetic field

  • TerryW
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Kramers-Kronig Relations: Principal Value

  • CharlieCW
  • · Replies 8 ·
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How Did Sci-Fi Shape Denis Villeneuve's Filmmaking Career?

  • SolitaryWalkerX
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How to determine particle energies in center of momentum frame?

  • RicardoMP
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Poincare algebra and its eigenvalues for spinors

  • Markus Kahn
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Second Quantization - Quasiparticles

  • LarryC
  • · Replies 3 ·
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The position and momentum operators for a free particle in Heisenberg picture

  • Haorong Wu
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Analytical solution of the Photon Diffusion Equation

  • Stearge
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How Do Lorentz Group Commutation Relations Apply to Spin Matrices?

  • Markus Kahn
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Rotational Dynamics, 1.68(SS.Krotov) and 1.264(Irodov)

  • Shridhar
  • · Replies 3 ·
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Minimum energy positron electron collision producing Z-boson

  • khallil
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Spin-##\frac{1}{2}## particles in infinite square well

  • Alex145
  • · Replies 9 ·
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9

Mixture of different gases at different temperatures

  • samak55
  • · Replies 5 ·
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An electron in an oscillating magnetic field

  • Haorong Wu
  • · Replies 4 ·
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Calculating field transformation

  • Markus Kahn
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4 momentum mass non-conservation, special relativity

  • Konhbri
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Solving a PDE with boundary problem

  • Karl86
  • · Replies 4 ·
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Half infinite cylinder uniform charge

  • Kosta1234
  • · Replies 16 ·
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Spherical capacitor with dielectrics

  • Karl86
  • · Replies 10 ·
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10

Observing galaxies: area of sky would I need to survey

  • Cedric Chia
  • · Replies 8 ·
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8

About initial mass function and mean mass in stellar cluster

  • Cedric Chia
  • · Replies 3 ·
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3

Volume integral over a gradient (quantum mechanics)

  • astrocytosis
  • · Replies 2 ·
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Fourier transforms, convolution, and Fraunhofer diffraction

  • marnobingo665
  • · Replies 2 ·
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Equation of motion for oscillations about a stable orbit

  • Daniel Sellers
  • · Replies 2 ·
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The potential between a cone and a plate

  • zengodspeed1
  • · Replies 6 ·
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Temperature profile between two parallel plates

  • skrat
  • · Replies 15 ·
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15

Did I Misinterpret the Change of Sign in the Feynman Propagator Integral?

  • binbagsss
  • · Replies 15 ·
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Some questions about surface plasmon polaritons

  • TheCatsMeow
  • · Replies 1 ·
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Superconductor in an external magnetic field

  • Raihan amin
  • · Replies 3 ·
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How Does Energy Transformation Occur in Quantum Orbital Mechanics?

  • lekh2003
  • · Replies 6 ·
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Galilei Transformation Free Schrödinger Equation

  • VVS
  • · Replies 8 ·
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Boltzmann equation - Why does theta = 5040/T

  • Physics Dad
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