#conservationlaws — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #conservationlaws, aggregated by home.social.
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Noether’s Theorem: Symmetry→Conservation Law.
Symmetries of the action imply conserved quantities per Noether's theorem.
A path q(t) is shifted by δq = φ but smoothed in transition layers τ wide at t0 and t1, where Δq̇ ≈ φ/τ. Action changes there approximate ΔS ≈ (∂L/∂q̇) Δq̇ τ ≈ −(∂L/∂q̇ φ)(t1) and ≈ +(∂L/∂q̇ φ)(t0).
Symmetry sets total ΔS = 0, hence (∂L/∂q̇ φ) is conserved from t0 to t1.Momentum conservation's derivation from space translation symmetry and energy conservation from time translation symmetry in mechanics and physics is done by it.
#NoethersTheorem #Physics #TheoreticalPhysics #ClassicalMechanics #AnalyticalMechanics #LagrangianMechanics #Symmetry #ConservationLaws #ActionPrinciple #CalculusOfVariations #Mathematics #STEM #Science #PhysicsEducation #LearnPhysics #QuantumPhysics #FieldTheory #GeneralizedCoordinates #MomentumConservation #EnergyConservation #AngularMomentum #TheoreticalScience #PhysicsNotes #Infographic #ScienceCommunication #EducationalContent #EMNoether #MathPhysics #PhysicsStudents #STEMEducation
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It's the time between the Winter Solstice and Christmas, and the forthcoming New Year... the perfect time to put a bowling ball (attached to the ceiling by cable) to one's chin, let it go, hold REAL still, and see what happens next.
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Interested in introductory #physics at the #university level? Check out my lecture playlist from when I taught Physics I (PHYS 1303/1307) at Southern Methodist University. The #lectures each focus on a topic and so can be cherry-picked, etc.
I taught using a flipped classroom model, with peer mentoring and active learning during class.
https://media.cooleysekula.net/w/p/2PpwDz6nNJ9C8EdXWdRTLQ
#mechanics #NewtonsLaws #Energy #ConservationLaws #Momentum #Motion #Force
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The physics behind how magnets stop being magnetic when hit by a pulse of light. It's all to do to conservation of angular momentum.
#Physics #Magnetism #AngularMomentum #ConservationLaws #Science
https://arstechnica.com/science/2019/01/magnets-how-do-they-stop-working/
