User kηives

55 votes

What are examples of Lagrangians that not of the form $T-U$?

answered Jan 13, 2013 at 2:51

12 votes

Potential energy in $E_f^2=(mc^2)^2+(pc)^2$?

answered Jan 7, 2013 at 17:55

12 votes

Accepted

Getting from $E^2 - p^2c^2 = m^2c^4$ to $E = \gamma mc^2$

answered May 18, 2012 at 16:19

11 votes

Adding 3 electron spins

answered Jun 4, 2012 at 6:24

8 votes

How do fields co-exist physically?

answered Oct 27, 2018 at 16:27

7 votes

Is spacetime discrete or continuous?

answered Aug 1, 2012 at 15:37

7 votes

Accepted

Calculating equation of motion from action

answered Sep 1, 2012 at 15:16

6 votes

Dirac equation as Hamiltonian system

answered Nov 7, 2012 at 3:38

5 votes

Could Quark model turn out to be false?

answered Sep 10, 2012 at 22:40

5 votes

Accepted

How to determine an exponential acceleration curve?

answered Jun 6, 2012 at 20:57

5 votes

Accepted

$SU(3)$ gauge invariance in QCD

answered Jan 11, 2013 at 22:16

4 votes

Is it possible to charge photons

answered Oct 1, 2012 at 13:53

4 votes

Intuition behind the concept of heat

answered Apr 11, 2012 at 14:15

3 votes

How are the Pauli matrices for the electron spin derived?

answered Jan 30, 2012 at 5:37

3 votes

What is the physical definition of causality?

answered Feb 1, 2012 at 4:12

3 votes

Rigorous approaches to quantum field theory

answered Jan 10, 2013 at 4:55

3 votes

Tensor product notation

answered Dec 1, 2012 at 17:11

3 votes

Transform hamiltonian

answered Jan 3, 2013 at 1:20

2 votes

Accepted

Is spinor the sum of scalar, vector, bi-vector, pseudo-vector, and pseudo-scalar?

answered Oct 29, 2018 at 19:45

2 votes

Ball Rolling in a Parabolic Bowl

answered Dec 19, 2012 at 3:26

2 votes

How is the Dirac adjoint generalized?

answered Dec 21, 2012 at 5:59

2 votes

Accepted

Finding Constant Angular Acceleration

answered Nov 24, 2012 at 4:16

2 votes

What maintains quark spin alignments in baryons?

answered Nov 28, 2012 at 21:54

2 votes

I do not understand why $a_-a_+\psi_n=(n+1)\psi_n$

answered Nov 26, 2015 at 3:53

2 votes

Is a world with constant/decreasing entropy theoretically impossible?

answered Feb 2, 2012 at 6:04

2 votes

How are magnetic fields transmitted?

answered Feb 3, 2012 at 4:27

2 votes

Area law for Entropy in Loop Quantum Gravity

answered May 15, 2012 at 0:26

2 votes

Why are atoms particles?

answered Sep 6, 2012 at 17:04

2 votes

Accepted

Energy shift between hydrogen and deuterium

answered Aug 27, 2012 at 17:06

1 vote

Ideal gas with two kinds of particles, Grand canonical partition function

answered Jun 15, 2012 at 22:13

Stack Exchange Network

56 Answers

What are examples of Lagrangians that not of the form $T-U$?

Potential energy in $E_f^2=(mc^2)^2+(pc)^2$?

Getting from $E^2 - p^2c^2 = m^2c^4$ to $E = \gamma mc^2$

Adding 3 electron spins

How do fields co-exist physically?

Is spacetime discrete or continuous?

Calculating equation of motion from action

Dirac equation as Hamiltonian system

Could Quark model turn out to be false?

How to determine an exponential acceleration curve?

$SU(3)$ gauge invariance in QCD

Is it possible to charge photons

Intuition behind the concept of heat

How are the Pauli matrices for the electron spin derived?

What is the physical definition of causality?

Rigorous approaches to quantum field theory

Tensor product notation

Transform hamiltonian

Is spinor the sum of scalar, vector, bi-vector, pseudo-vector, and pseudo-scalar?

Ball Rolling in a Parabolic Bowl

How is the Dirac adjoint generalized?

Finding Constant Angular Acceleration

What maintains quark spin alignments in baryons?

I do not understand why $a_-a_+\psi_n=(n+1)\psi_n$

Is a world with constant/decreasing entropy theoretically impossible?

How are magnetic fields transmitted?

Area law for Entropy in Loop Quantum Gravity

Why are atoms particles?

Energy shift between hydrogen and deuterium

Ideal gas with two kinds of particles, Grand canonical partition function