Advanced Physics Homework Help Forum

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Free advanced physics homework help via qualified mentors. Upper undergraduate and graduate level. Please use the template when requesting help and show your work.
Do Coherent States Imply 0 Energy Uncertainty?
  • uxioq99
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Unitary vector commuting with Hamiltonian and effect on system
  • happyparticle
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8
Spacetime translations and general Lagrangian density for Field Theory
  • Paulpaulpa
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5
My Epic Fail at Deriving an Equation with Lagrange
  • Arm
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16
Calculate limit value with several variables
  • GravityX
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3
Analysis of the Ground Function: f(x) with $$f''(\bar{x})=0$$
  • vinicius_linhares
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6
The Energy Expectation Value for a Moving Hydrogen Atom
  • uxioq99
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Determine the particles most probable position
  • Addez123
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10
Solving for degeneracy electron cloud temperature
  • kamui1
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Time Independence of the Momentum Uncertainty for a Free Particle Wave
  • uxioq99
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3
Probability density of a 1-D Tonk Gas
  • GravityX
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1
Instantaneous Decay of Tritium into Helium
  • uxioq99
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5
If |a> is an eigenvector of A, is f(B)|a> an eigenvector of A?
  • happyparticle
  • · Replies 17 ·
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Relationship between magnetic field lines and magnetic field
  • a1234
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4
How can I determine the values of α and β for a canonical transformation?
  • Lambda96
  • · Replies 19 ·
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19
What Does $$E^2_k|_{k=k_{res}}$$ Mean?
  • NODARman
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3
Show that this dephasing operation is Markovian
  • Pete5876
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1
Find pupil locations w/ paraxial ray tracing (thick lens, Geary CH 5)
  • phillip_at_work
  • · Replies 7 ·
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7
Compton scattering with off-shell photon
  • Marioweee
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1
Sending drive Pulse in CQED and visualize the state by QuTip
  • physicsclaus
  • · Replies 6 ·
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6
Conserved quantities via Poisson brackets
  • Lambda96
  • · Replies 6 ·
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6
Weird barometric formula experiment results in Excel
  • NODARman
  • · Replies 22 ·
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22
Understanding the Equipartition Theorem for Ideal Gases
  • GravityX
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4
Hamiltonian of a Point particle on a frictionless plane
  • S1000
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2
How to Determine the Stability Condition in Couette Flow?
  • URIA
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2
Use the Virial theorem to show the following...
  • GravityX
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2
How to calculate gating time from the rate of the random coincidence?
  • physicsclaus
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1
How to Calculate the Activity of 0.000001 mL Rn-222?
  • Elbirdo
  • · Replies 16 ·
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16
Lorentzian line profile of emitted radiation
  • MigMRF
  • · Replies 2 ·
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2
Fluid mechanics: water jet impacting an inclined plane
  • Guillem_dlc
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How to calculate dark count from data collected?
  • physicsclaus
  • · Replies 11 ·
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11
Canonical transformations of a quantized Hamiltonian?
  • yucheng
  • · Replies 3 ·
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3
Moment of Inertia of something that rotates
  • Lambda96
  • · Replies 15 ·
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15
Isospin and Partons model in a pentaquark
  • rogdal
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1
Unitary Operators: Proving <Af,Ag>=<f,g>
  • Physicsdudee
  • · Replies 8 ·
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8
Solving Curl A in Spherical Coordinates: Tips & Hints
  • phos19
  • · Replies 1 ·
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Average value of components of angular momentum for a wave packet
  • Nelsonc
  • · Replies 4 ·
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4
Micro Spring (DNA): Determine Energies, Find Expected Length
  • GravityX
  • · Replies 2 ·
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2
Inertia tensor around principal Axes part 2
  • Lambda96
  • · Replies 2 ·
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2
Inertia tensor around principal Axes
  • Lambda96
  • · Replies 28 ·
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28
Coupled Vertical Spring-Mass Systems
  • graviton_10
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3
Difference between average position of electron and average separation
  • happyparticle
  • · Replies 14 ·
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14
Modification to the simple harmonic oscillator
  • jamesonWHIS
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2
Electric field of a spherical conductor with a dipole in the center
  • Jelsborg
  • · Replies 4 ·
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4
Apply the Legendre Transformation to the Entropy S as a function of E
  • GravityX
  • · Replies 4 ·
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4
Lagrangian/Stationary-action principle
  • Lambda96
  • · Replies 5 ·
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5
Electromagnetic linear momentum for a system of two moving charges
  • angrystudent
  • · Replies 3 ·
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3
Stationary states infinite cubic well
  • happyparticle
  • · Replies 3 ·
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3
Interaction energy of two interpenetrating spheres of uniform charge density
  • Johe
  • · Replies 11 ·
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11
Interaction Energy For Two Point Charges
  • thecourtholio
  • · Replies 11 ·
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11
Strong Inequality Hydrodynamics: Flat Cylinder in Water
  • zaevin
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Point transformation for a constrained particle
  • Lambda96
  • · Replies 7 ·
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7
Phase space of spherical coordinates and momenta
  • ShayanJ
  • · Replies 9 ·
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9
Is an operator (integral) Hermitian?
  • happyparticle
  • · Replies 17 ·
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17
Calculations using the Standard Solar Model & Solar Equations of State
  • dzizzling
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Which Feynman diagram or diagrams include feasible processes?
  • physicscal
  • · Replies 7 ·
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7
Stuck calculating probability of measuring ##S_y## for spin 1 particle
  • earthling75
  • · Replies 3 ·
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3
Allowed energy for a potential in quantum mechanics
  • happyparticle
  • · Replies 12 ·
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12
Normalize function - quantum chemistry
  • kanciara
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2
What Is the Correct Partition Function for a Spin System?
  • happyparticle
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Leading non-vanishing term of the groundstate for ##H_0##
  • guyvsdcsniper
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2
Solving a Celestial Mechanics Task with Velocity Vector Scattering
  • Lambda96
  • · Replies 2 ·
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2
Canonical ensemble <(Delta E)^3> expression
  • GrandsonOfMagnusCarl
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2
Integration of structure function F2 to calculate quark momentum
  • qatch
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Measurement problem quantum mechanics
  • Ashish Somwanshi
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Degrees of freedom and holonomic constraints
  • Lambda96
  • · Replies 15 ·
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15
What causes the radioactive decay of an unstable nucleus?
  • sayetsu
  • · Replies 4 ·
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Einstein solid state model exercise
  • besebenomo
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Nuclear shell model of double magic nucleus 132Sn
  • Marioweee
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Vertical Spring System (Lagrangian)
  • andris0110
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Orbital angular momentum Hamiltonian
  • anakin
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5
Quantum Mechanics problem: Determine the value of the constant
  • Ineedhelpimbadatphys
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3
QFT: Normalization of coherent states
  • Marioweee
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2
Kramers-Kronig, parity and delta function
  • happyparticle
  • · Replies 5 ·
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5
Upper bound for first excited state - variational principle
  • lua
  • · Replies 2 ·
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2
Is my Feynman diagram for production of ##W^-## boson correct?
  • Nirmal Padwal
  • · Replies 5 ·
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5
Coordinate Transformation (multivariable calculus)
  • luqman
  • · Replies 1 ·
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1
Partition function of modified Ising model
  • LCSphysicist
  • · Replies 1 ·
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1
Measurement problem quantum mechanics
  • Ashish Somwanshi
  • · Replies 4 ·
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4
Calculate the probablity density and current density of a wavefunction
  • anchal2147
  • · Replies 1 ·
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1
Energy conservation: electromagnetic wave in matter
  • happyparticle
  • · Replies 1 ·
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1
What is the relationship between entropy and pressure in thermodynamics?
  • happyparticle
  • · Replies 2 ·
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2
Condensed Matter Physics - Fermi velocity, etc.
  • Graham87
  • · Replies 5 ·
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5
Checking assumptions in boundary conditions of double well system
  • baseballfan_ny
  • · Replies 5 ·
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5
Radiation emitted by a decelerated particle
  • physics_student123
  • · Replies 16 ·
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16
Matrix representation in QM Assignment -- Need some help please
  • Ashish Somwanshi
  • · Replies 2 ·
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2
Understanding Complex Conjugates in QM (Griffiths pg. 13)
  • RahSuh
  • · Replies 2 ·
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2
Determining Electric and Magnetic field given certain conditions
  • guyvsdcsniper
  • · Replies 5 ·
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5
Determine eigenvalue-problem for steel pole
  • schniefen
  • · Replies 4 ·
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4
How to count all ways to arrange Bosons?
  • benagastov
  • · Replies 1 ·
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X^4 perturbative energy eigenvalues for harmonic oscillator
  • PBTR3
  • · Replies 6 ·
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6
Help with Atomic Calcium Electron Configurations
  • physicisttobe
  • · Replies 11 ·
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11
Why Is the d-Orbital Considered in Sc Term Symbols?
  • physicisttobe
  • · Replies 5 ·
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5
How is converted the energy of a E.M. wave in a conductor
  • happyparticle
  • · Replies 1 ·
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1
Troubleshooting Coordinates System from Cone
  • Reg_S
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Classical mechanics problem for a free particle
  • becks1
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Use Gauss' Law to calculate the electrostatic potential for this cylinder
  • Reg_S
  • · Replies 4 ·
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4
Lagrangian equation for 5 pulley Atwood Machine.
  • uber_kim
  • · Replies 4 ·
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4
How Does Adding Derivatives to the Lagrangian Affect Hamiltonian Equations?
  • barek
  • · Replies 7 ·
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7
Mass/Energy of a collapsing gas shell (MTW 21.27)
  • TerryW
  • · Replies 1 ·
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1