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All questions asked by agone07

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Time Dilation as an explaination for the expansion of the univers acceleration

0   Physics Asked on 07/13/2021

astrophysics  cosmology 

Is action maximized for a system in stable equilibrium?

1   Physics Asked on 07/18/2021

action  classical mechanics  lagrangian formalism  stability  variational principle 

Above the electroweak scale, is the Higgs ever effectively massless? (thermal field)

0   Physics Asked on 07/18/2021

higgs  thermal field theory 

Proper time invariance and conformal symmetry group

2   Physics Asked on 07/18/2021

causality  conformal field theory  metric tensor  spacetime  special relativity 

In which QED limit are Einstein's rate equations for transitions in atoms valid?

1   Physics Asked on 07/18/2021

atomic physics  laser  quantum optics 

Why do we need large time assumption for energy conservation in electron transitions?

2   Physics Asked on 07/18/2021

atomic physics  dirac delta distributions  energy conservation  fermis golden rule  quantum mechanics 

Under what conditions can a positron exist in everyday conditions?

1   Physics Asked on 07/18/2021

antimatter 

Gradient in cylindrical coordinate using covariant derivative

1   Physics Asked on 07/18/2021

coordinate systems  differentiation  tensor calculus 

Electric field at the centre of a hemispherical shell

0   Physics Asked on 07/18/2021

electric fields  electromagnetism  electrostatics  integration 

Where does the Berry phase of $pi$ come from in a topological insulator?

0   Physics Asked on 07/18/2021

berry pancharatnam phase  electronic band theory  solid state physics  topological insulators 

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