User John Rennie - Physics Stack Exchange

John Rennie

Member for 13 years, 3 months
Last seen this week

GitHub
ratsauce.co.uk
Chester, United Kingdom

24 Questions

Score Activity Newest Views

12 votes

4 answers

1k views

Why are the two outer charge densities on a system of parallel charged plates identical?

asked Mar 12, 2019 at 8:43

24 votes

1 answer

2k views

Does light really travel more slowly near a massive body?

asked Apr 14, 2018 at 5:03

20 votes

2 answers

2k views

Does an accelerating electric dipole radiate?

asked Mar 11, 2018 at 12:59

105 votes

12 answers

15k views

How can time dilation be symmetric?

asked Jan 30, 2018 at 17:09

108 votes

15 answers

19k views

What is the proper way to explain the twin paradox?

asked Mar 7, 2016 at 16:22

82 votes

12 answers

14k views

What is time dilation really?

asked Mar 6, 2016 at 9:18

106 votes

10 answers

18k views

What is time, does it flow, and if so what defines its direction?

asked Feb 12, 2016 at 11:12

18 votes

1 answer

688 views

Is electron/positron annihilation to two gravitons forbidden?

asked Sep 23, 2015 at 12:38

11 votes

3 answers

3k views

Does a rotating disk develop a potential difference between the centre and rim?

asked Jun 9, 2015 at 10:54

3 votes

2 answers

254 views

Why is $p_\phi$ conserved in a Schwarzschild orbit?

asked Apr 10, 2015 at 10:59

22 votes

6 answers

3k views

Interpretation of a singular metric

asked Dec 7, 2014 at 16:44

10 votes

3 answers

546 views

How to describe arbitrary accelerations in special relativity

asked Nov 12, 2014 at 11:00

397 votes

8 answers

64k views

Did the Big Bang happen at a point?

asked Sep 23, 2014 at 10:03

25 votes

2 answers

7k views

How does the Hubble parameter change with the age of the universe?

asked Sep 18, 2014 at 8:53

59 votes

4 answers

27k views

Does time move slower at the equator?

asked Jul 17, 2014 at 11:48

4 votes

4 answers

659 views

What makes a coordinate curved?

asked Jul 1, 2014 at 17:52

55 votes

2 answers

25k views

How long would it take me to travel to a distant star?

asked Apr 24, 2014 at 6:08

27 votes

2 answers

3k views

Building a wormhole

asked Apr 23, 2014 at 9:40

163 votes

9 answers

40k views

Does someone falling into a black hole see the end of the universe?

asked Oct 29, 2013 at 13:25

7 votes

1 answer

441 views

Does a diatomic molecule falling into a black hole dissociate?

asked Oct 23, 2013 at 11:25

45 votes

2 answers

2k views

Identification of particles and anti-particles

asked Oct 22, 2013 at 15:27

3 votes

2 answers

295 views

Do bubble universes have a centre?

asked Sep 11, 2013 at 10:34

23 votes

2 answers

1k views

Does a charged or rotating black hole change the genus of spacetime?

asked Dec 19, 2012 at 8:51

16 votes

2 answers

939 views

Could LEP II have discovered a 125GeV Higgs?

asked Feb 12, 2012 at 15:18