#energyconservation — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #energyconservation, aggregated by home.social.
-
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
-
Fans Don’t Cool Rooms and 3 Other Myths About Home Energy Conservation
Shutterstock Want to spend less on energy? You’re not alone. Summer’s approach means air conditioning season is almost here, just in time for a global energy crisis. Naturally, we’re all looking for ways to lower our energy bills. There’s a lot of great advice out there, from ditching incandescent lights to getting a heat pump. But there’s also some energy-saving advice that is useless—and a few tips that actually waste energy.......Continue reading.. By: Justin […] -
Reading the dissertation was fascinating because it reveals a side of #Helmholtz that is rarely discussed today. Long before his work on #EnergyConservation, #electrodynamics, and #WavePhysics, he was already deeply engaged with #anatomical and #biological questions.
It also shows that some core ideas about the comparative structure of nervous systems were already being articulated in the early 19th century.
-
Dabbel gets $4.4M to cut CO2 by automating HVAC for commercial buildings - Düsseldorf-based proptech startup Dabbel is using AI to drive energy efficiency sa... - http://feedproxy.google.com/~r/Techcrunch/~3/kjkw0J1GpzA/ #artificialintelligence #buildingautomation #energyconservation #energyconsumption #energyefficiency #fundings&exits #targetglobal #commerzbank #dusseldorf #greentech #proptech #germany #europe #energy #saas #ai