User Physiks lover

2 votes

1 answer

173 views

Why does Dirac write $\langle\xi'|\overline{f(\xi)} = \overline f(\xi ')\langle\xi'|$?

asked Oct 5, 2014 at 15:04

1 vote

1 answer

263 views

How does Dirac form this conjugate imaginary equation?

asked Sep 22, 2014 at 16:45

2 votes

1 answer

111 views

How does Dirac show that $\langle B|\bar{\bar{\alpha}}|P\rangle\;=\; \overline{\langle P|{\bar{\alpha}}|B\rangle}\;=\; \langle B|{\alpha}|P\rangle$?

asked Sep 2, 2014 at 16:59

0 votes

2 answers

182 views

Is there a "forwards" and "backwards" in one dimension?

asked Aug 24, 2014 at 16:09

1 vote

3 answers

1k views

Why should multiplication of a ket vector by a complex number change only its "direction"?

asked Aug 19, 2014 at 22:39

3 votes

2 answers

399 views

Why does a stationary force affect the conservation of momentum, but not the conservation of energy?

asked Sep 24, 2013 at 14:46

2 votes

3 answers

1k views

Must the Lagrangian always be known for the Euler-Lagrange equations to be of any use?

asked Mar 16, 2013 at 20:58

2 votes

3 answers

6k views

What is meant by potential energy for a particle in a field?

asked Oct 17, 2012 at 11:45

7 votes

8 answers

3k views

Is Einstein's 1916 General Relativity paper a recommended way to start learning about the subject?

asked Sep 1, 2011 at 17:55

2 votes

1 answer

594 views

Which main physics journals publish the main types of physics papers? [closed]

asked May 11, 2012 at 20:23

1 vote

1 answer

60 views

Is the stress finite at the centre of a spherical continuous charge distribution?

asked Jul 25, 2012 at 21:34

2 votes

1 answer

72 views

Why isn't the force modelled which confines excess charge to remain inside a conductor?

asked May 15, 2012 at 16:45

3 votes

1 answer

2k views

Can relativistic kinetic energy be derived from Newtonian kinetic energy?

asked Apr 13, 2012 at 14:41

3 votes

1 answer

4k views

Problems that Lagranges equations of the 1st kind can solve whereas the 2nd kind can't?

asked Nov 19, 2011 at 22:41

6 votes

2 answers

4k views

Is (0,0,0) an undefined vector?

asked Nov 11, 2011 at 21:50

4 votes

1 answer

318 views

Is there a Newton's third law for the em field?

asked Oct 25, 2011 at 22:26

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76 Questions

Why does Dirac write $\langle\xi'|\overline{f(\xi)} = \overline f(\xi ')\langle\xi'|$?

How does Dirac form this conjugate imaginary equation?

How does Dirac show that $\langle B|\bar{\bar{\alpha}}|P\rangle\;=\; \overline{\langle P|{\bar{\alpha}}|B\rangle}\;=\; \langle B|{\alpha}|P\rangle$?

Is there a "forwards" and "backwards" in one dimension?

Why should multiplication of a ket vector by a complex number change only its "direction"?

Why does a stationary force affect the conservation of momentum, but not the conservation of energy?

Must the Lagrangian always be known for the Euler-Lagrange equations to be of any use?

What is meant by potential energy for a particle in a field?

Is Einstein's 1916 General Relativity paper a recommended way to start learning about the subject?

Which main physics journals publish the main types of physics papers? [closed]

Is the stress finite at the centre of a spherical continuous charge distribution?

Why isn't the force modelled which confines excess charge to remain inside a conductor?

Can relativistic kinetic energy be derived from Newtonian kinetic energy?

Problems that Lagranges equations of the 1st kind can solve whereas the 2nd kind can't?

Is (0,0,0) an undefined vector?

Is there a Newton's third law for the em field?