User user6760 - Physics Stack Exchange

69 votes

6 answers

13k views

Why does a ping pong ball bounce higher when it is dropped together with a cup of water?

asked Jun 28, 2020 at 2:26

58 votes

7 answers

14k views

If magnetic field lines don't exist, what are these iron filings doing around a magnet?

asked Feb 9, 2020 at 8:11

49 votes

7 answers

8k views

What are gravitational waves made of?

asked Mar 24, 2016 at 3:09

37 votes

3 answers

5k views

Could a powerful gravitational wave cause electrons to emit light?

asked Mar 5, 2018 at 8:10

35 votes

6 answers

11k views

Is the Higgs boson an elementary particle? If so, why does it decay? [duplicate]

asked Jan 15, 2019 at 3:42

32 votes

10 answers

11k views

When I drink with a straw, is the atmospheric pressure pushing the water or me sucking it?

asked Dec 17, 2021 at 14:45

28 votes

5 answers

8k views

Why is the air inside an igloo warmer than its outside?

asked Jan 14, 2021 at 7:02

28 votes

2 answers

4k views

Why do I need to adjust TV antenna on the roof for better video quality?

asked Oct 24, 2017 at 2:38

27 votes

5 answers

12k views

Is there any disadvantage to sending rockets straight up?

asked Apr 27, 2015 at 3:55

23 votes

2 answers

4k views

If a black hole is created from light, can this black hole then move at the speed of light?

asked Mar 29, 2019 at 11:00

18 votes

3 answers

4k views

Is sound a classical mechanic phenomenon or is it a quantum effect?

asked Dec 10, 2021 at 3:21

17 votes

1 answer

2k views

Would there be one rainbow, a double rainbow or bisecting rainbow on a planet with two suns?

asked Jan 3 at 7:23

17 votes

6 answers

5k views

Would a uranium 235 fuel pellet the size of Earth explode?

asked Dec 13, 2019 at 6:14

16 votes

2 answers

2k views

Measuring the size of the proton from the hydrogen atom spectrum?

asked Dec 21, 2019 at 6:48

16 votes

3 answers

7k views

Is a classical laser possible?

asked Feb 25, 2020 at 9:55

15 votes

4 answers

5k views

Can gravitational waves do work?

asked Dec 12, 2023 at 13:10

12 votes

2 answers

2k views

How does a spectral line tell us about the magnetic field of a star?

asked Jan 30, 2020 at 7:33

12 votes

2 answers

3k views

What causes a black hole ringdown and why can it prove the no-hair theorem?

asked Jan 8, 2020 at 8:48

12 votes

2 answers

4k views

Why can a particle decay into two photons but not one?

asked Jan 12, 2019 at 3:42

12 votes

5 answers

3k views

How can two electrons repel if it's impossible for free electrons to absorb or emit energy?

asked Dec 20, 2018 at 0:20

10 votes

3 answers

2k views

What is the shortest distance between electron and positron before they are annihilated?

asked Feb 28, 2018 at 7:27

10 votes

1 answer

3k views

How much of neutrinos pass through a neutron star?

asked Sep 17, 2016 at 2:50

10 votes

1 answer

2k views

Does antimatter have the same half-life as ordinary matter?

asked Feb 7 at 7:20

9 votes

4 answers

2k views

How does the Higgs field enable masses to attract each other?

asked Sep 5, 2017 at 3:33

8 votes

2 answers

1k views

What really is the speed of light in a medium/vacuum, group or phase velocity?

asked Dec 26, 2018 at 1:04

8 votes

2 answers

384 views

How to infer that the black hole in M87 is rotating clockwise?

asked Apr 11, 2019 at 10:12

8 votes

1 answer

2k views

Why did Einstein introduce expansion in his equation and later on it was patched?

asked Feb 18, 2020 at 4:56

8 votes

4 answers

5k views

Since water is a molecule, can the aerosol sprayed through double slit form interference pattern?

asked Dec 10, 2023 at 13:36

8 votes

2 answers

1k views

Why marbles don't shatter like a glass panel does?

asked Dec 30, 2021 at 7:10

7 votes

5 answers

4k views

If lightning is caused by ionisation of air, why does it only last briefly?

asked Feb 14, 2022 at 7:57

Stack Exchange Network

468 Questions

Why does a ping pong ball bounce higher when it is dropped together with a cup of water?

If magnetic field lines don't exist, what are these iron filings doing around a magnet?

What are gravitational waves made of?

Could a powerful gravitational wave cause electrons to emit light?

Is the Higgs boson an elementary particle? If so, why does it decay? [duplicate]

When I drink with a straw, is the atmospheric pressure pushing the water or me sucking it?

Why is the air inside an igloo warmer than its outside?

Why do I need to adjust TV antenna on the roof for better video quality?

Is there any disadvantage to sending rockets straight up?

If a black hole is created from light, can this black hole then move at the speed of light?

Is sound a classical mechanic phenomenon or is it a quantum effect?

Would there be one rainbow, a double rainbow or bisecting rainbow on a planet with two suns?

Would a uranium 235 fuel pellet the size of Earth explode?

Measuring the size of the proton from the hydrogen atom spectrum?

Is a classical laser possible?

Can gravitational waves do work?

How does a spectral line tell us about the magnetic field of a star?

What causes a black hole ringdown and why can it prove the no-hair theorem?

Why can a particle decay into two photons but not one?

How can two electrons repel if it's impossible for free electrons to absorb or emit energy?

What is the shortest distance between electron and positron before they are annihilated?

How much of neutrinos pass through a neutron star?

Does antimatter have the same half-life as ordinary matter?

How does the Higgs field enable masses to attract each other?

What really is the speed of light in a medium/vacuum, group or phase velocity?

How to infer that the black hole in M87 is rotating clockwise?

Why did Einstein introduce expansion in his equation and later on it was patched?

Since water is a molecule, can the aerosol sprayed through double slit form interference pattern?

Why marbles don't shatter like a glass panel does?

If lightning is caused by ionisation of air, why does it only last briefly?