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20 votes

Why doesn't an electron rip itself apart?

answered Jun 14, 2021 at 18:10

18 votes

Feynman couldn't explain how the photon becomes instantaneously aware of the glass thickness. Do we have a better understanding now?

answered Sep 4, 2020 at 8:09

11 votes

How do electrical devices limit the current flow from a socket?

answered Jun 13, 2021 at 9:11

8 votes

Accepted

Is the Four-gradient of a Scalar Field a Four-Vector?

answered Feb 1, 2020 at 22:58

8 votes

How can a simple physical situation give rise to two different possible outcomes?

answered Aug 2, 2021 at 21:28

6 votes

How long does the contact between a free-falling rigid sphere and the ground last in a perfectly elastic collision?

answered Jun 14, 2021 at 20:24

5 votes

Accepted

Can static friction force alone make the center of mass accelerate in this example?

answered Jun 17, 2021 at 6:13

4 votes

Addition of gravitational fields in general relativity

answered Aug 5, 2022 at 7:40

4 votes

Why doesn't conservation of energy 'work' for collisions?

answered Jun 14, 2021 at 22:22

4 votes

Why do images not appear inverted when looking directly through a pinhole camera?

answered Apr 11, 2021 at 22:06

4 votes

Does Huygens Principle, by itself, explain diffraction?

answered Apr 27, 2020 at 3:00

3 votes

What makes a wheel spin?

answered Jan 31, 2020 at 13:23

3 votes

Accepted

When a tuning fork is struck, how does the struck tine induce vibrations in the secondary tine?

answered Apr 16, 2020 at 11:07

3 votes

When Sean Carroll says "The Laws Underlying The Physics of Everyday Life Are Completely Understood" , is he being click-baity or is he correct?

answered Jun 13, 2021 at 11:35

3 votes

Vibration in a guitar when playing two strings

answered Aug 6, 2019 at 14:51

3 votes

When I walk down the stairs where does my potential energy go?

answered Jun 15, 2021 at 4:51

3 votes

Why is there no electric field in the ideal wire?

answered Jun 15, 2021 at 21:45

2 votes

Is potential difference $0$ across a $0$ resistance wire but of non-uniform cross section area?

answered Jun 15, 2021 at 6:37

2 votes

Will a penny ever stand still in the water at a certain depth?

answered Jul 18, 2021 at 5:51

2 votes

Can nothing other than light have speed independent of source?

answered Aug 9, 2021 at 3:05

2 votes

Accepted

Understanding quantum mechanics

answered Oct 19, 2019 at 1:04

2 votes

Accepted

What is the change of entropy for a resistor at constant temperature?

answered Jun 24, 2019 at 16:32

2 votes

What makes air a good insulator?

answered Jun 24, 2019 at 20:42

2 votes

Accepted

Momentum conservation in special relativity

answered Nov 16, 2019 at 12:50

2 votes

What is the air pressure on a magic wall that reflects all incident molecules perpendicularly to itself?

answered Feb 3, 2020 at 5:21

2 votes

Gauge theory formalism

answered Dec 19, 2019 at 16:07

2 votes

How would you calculate the ratio of electric repulsion between two electrons and magnetic attraction?

answered Nov 24, 2019 at 4:25

2 votes

To a fish in a fish bowl, do the objects outside look smaller?

answered Dec 16, 2019 at 19:02

2 votes

Are the basins of attraction of two static gravitational sources two half-planes?

answered Dec 17, 2019 at 15:05

2 votes

Accepted

Why does a hollow and solid sphere expand the same volume when heated to the same temperature? Explain it quantitatively, not via a formula

answered Jun 12, 2021 at 22:35

Stack Exchange Network

110 Answers

Why doesn't an electron rip itself apart?

Feynman couldn't explain how the photon becomes instantaneously aware of the glass thickness. Do we have a better understanding now?

How do electrical devices limit the current flow from a socket?

Is the Four-gradient of a Scalar Field a Four-Vector?

How can a simple physical situation give rise to two different possible outcomes?

How long does the contact between a free-falling rigid sphere and the ground last in a perfectly elastic collision?

Can static friction force alone make the center of mass accelerate in this example?

Addition of gravitational fields in general relativity

Why doesn't conservation of energy 'work' for collisions?

Why do images not appear inverted when looking directly through a pinhole camera?

Does Huygens Principle, by itself, explain diffraction?

What makes a wheel spin?

When a tuning fork is struck, how does the struck tine induce vibrations in the secondary tine?

When Sean Carroll says "The Laws Underlying The Physics of Everyday Life Are Completely Understood" , is he being click-baity or is he correct?

Vibration in a guitar when playing two strings

When I walk down the stairs where does my potential energy go?

Why is there no electric field in the ideal wire?

Is potential difference $0$ across a $0$ resistance wire but of non-uniform cross section area?

Will a penny ever stand still in the water at a certain depth?

Can nothing other than light have speed independent of source?

Understanding quantum mechanics

What is the change of entropy for a resistor at constant temperature?

What makes air a good insulator?

Momentum conservation in special relativity

What is the air pressure on a magic wall that reflects all incident molecules perpendicularly to itself?

Gauge theory formalism

How would you calculate the ratio of electric repulsion between two electrons and magnetic attraction?

To a fish in a fish bowl, do the objects outside look smaller?

Are the basins of attraction of two static gravitational sources two half-planes?

Why does a hollow and solid sphere expand the same volume when heated to the same temperature? Explain it quantitatively, not via a formula