User Brain Stroke Patient

7 votes

2 answers

5k views

Meaning of time derivative of an operator

asked Jan 29, 2019 at 12:23

5 votes

1 answer

148 views

Entropy equation in Pathria

asked Nov 20, 2022 at 16:27

5 votes

1 answer

402 views

Why does square of Planck length come as coupling constant when quantizing gravity in 3+1D?

asked May 8, 2023 at 7:36

4 votes

1 answer

97 views

Why are crystalline structures in solids so common?

asked Dec 20, 2022 at 11:01

4 votes

5 answers

1k views

Dirac delta function defined in Zee's Quantum Field Theory book

asked Oct 2, 2021 at 7:12

4 votes

1 answer

96 views

Trying to show new matrix elements of momentum operator after unitary transformation of $|x \rangle$

asked Jun 6, 2021 at 4:51

4 votes

3 answers

316 views

Having trouble making sense of Einstein's thought experiment

asked Dec 13, 2018 at 10:28

4 votes

2 answers

284 views

Is this relativistic mass?

asked Apr 8, 2019 at 20:32

4 votes

3 answers

2k views

Why isn't electric field due to outside charges taken into account when calculating the "total" field in some Gauss law problems?

asked Oct 3, 2020 at 6:10

3 votes

1 answer

197 views

Is the apparent gravitational force on certain parts of a rotating spherical planet off centre?

asked Jun 25, 2020 at 10:10

3 votes

0 answers

128 views

Is it possible to guess this solution just by looking at the system? [closed]

asked Aug 9, 2019 at 18:48

3 votes

1 answer

2k views

Why is the reflection coefficient 1 for step potentials where energy is less than the potential?

asked May 29, 2021 at 9:25

3 votes

0 answers

128 views

Lorentz boost in curved spacetime

asked May 10, 2023 at 12:37

2 votes

0 answers

21 views

What are $w,x,y,z$ electronic transitions? How are they classified?

asked Aug 8 at 4:27

2 votes

2 answers

96 views

Is Gauss law for gravity local?

asked Nov 4, 2022 at 22:32

2 votes

0 answers

187 views

Properties of analytic continuation of two point/ Wightman function

asked May 9, 2023 at 17:09

2 votes

2 answers

523 views

Is angular momentum conservation Galilean invariant?

asked May 8, 2022 at 8:30

2 votes

3 answers

548 views

What does it mean to say that the majority carriers are holes?

asked Sep 15, 2021 at 13:45

2 votes

1 answer

104 views

Trying to find direction of force on a stationary charge in a changing magnetic field using faraday's law

asked Sep 26, 2020 at 5:21

2 votes

1 answer

132 views

Confusion regarding fermi-dirac distribution function

asked Oct 16, 2019 at 18:18

2 votes

4 answers

799 views

How does a cavity mimic a black body when emitting radiation?

asked May 10, 2020 at 8:10

2 votes

1 answer

360 views

Direct Series Solution Attempt of the Quantum Harmonic Oscillator

asked Oct 20, 2020 at 16:57

1 vote

2 answers

286 views

Contradiction between Galilean transformation and conservation of mechanical energy

asked Mar 14, 2021 at 8:04

1 vote

3 answers

209 views

Is friction different when viewed from a non-inertial frame?

asked Jun 30, 2020 at 6:29

1 vote

1 answer

413 views

Why aren't orbits transferred at the perigee?

asked Jul 12, 2020 at 17:56

1 vote

1 answer

450 views

Can't understand derivation of relativistic mass in Kleppner

asked Jul 30, 2020 at 7:47

1 vote

1 answer

117 views

Are operator matrices of $x$ and $p$ the same for all systems?

asked Oct 14, 2019 at 18:52

1 vote

1 answer

347 views

Different forces from different inertial frames?

asked Jul 19, 2019 at 10:22

1 vote

3 answers

808 views

Not understanding the minus sign in the torque equation for a simple pendulum

asked Feb 18, 2020 at 9:49

1 vote

1 answer

232 views

Rotational Work-Energy Theorem and uniform precession of a gyroscope

asked Mar 13, 2020 at 10:46

Stack Exchange Network

63 Questions

Meaning of time derivative of an operator

Entropy equation in Pathria

Why does square of Planck length come as coupling constant when quantizing gravity in 3+1D?

Why are crystalline structures in solids so common?

Dirac delta function defined in Zee's Quantum Field Theory book

Trying to show new matrix elements of momentum operator after unitary transformation of $|x \rangle$

Having trouble making sense of Einstein's thought experiment

Is this relativistic mass?

Why isn't electric field due to outside charges taken into account when calculating the "total" field in some Gauss law problems?

Is the apparent gravitational force on certain parts of a rotating spherical planet off centre?

Is it possible to guess this solution just by looking at the system? [closed]

Why is the reflection coefficient 1 for step potentials where energy is less than the potential?

Lorentz boost in curved spacetime

What are $w,x,y,z$ electronic transitions? How are they classified?

Is Gauss law for gravity local?

Properties of analytic continuation of two point/ Wightman function

Is angular momentum conservation Galilean invariant?

What does it mean to say that the majority carriers are holes?

Trying to find direction of force on a stationary charge in a changing magnetic field using faraday's law

Confusion regarding fermi-dirac distribution function

How does a cavity mimic a black body when emitting radiation?

Direct Series Solution Attempt of the Quantum Harmonic Oscillator

Contradiction between Galilean transformation and conservation of mechanical energy

Is friction different when viewed from a non-inertial frame?

Why aren't orbits transferred at the perigee?

Can't understand derivation of relativistic mass in Kleppner

Are operator matrices of $x$ and $p$ the same for all systems?

Different forces from different inertial frames?

Not understanding the minus sign in the torque equation for a simple pendulum

Rotational Work-Energy Theorem and uniform precession of a gyroscope