User hdhondt - Physics Stack Exchange

86 votes

Given that ice is less dense than water, why doesn't it sit completely atop water (rather than slightly submerged)?

answered Oct 29, 2016 at 2:57

67 votes

Why is nuclear waste more dangerous than the original nuclear fuel?

answered Nov 16, 2016 at 3:43

44 votes

Why does thermal radiation only occur at infrared and visible frequencies?

answered Dec 9, 2016 at 4:53

32 votes

Why is there no magnetic field around a wire connected to electricity at home?

answered Jun 28, 2018 at 1:43

27 votes

Why does a piece of thread form a straight line when we pull it?

answered Oct 4, 2022 at 2:51

27 votes

Accepted

Why is the velocity different for different points on a rolling wheel?

answered Nov 28, 2016 at 4:12

19 votes

Different batteries connected in parallel

answered May 14, 2013 at 1:48

19 votes

Causes of hexagonal shape of Saturn's jet stream

answered Dec 5, 2013 at 9:32

19 votes

Why does the speed of light in vacuum have no uncertainty?

answered Jan 9, 2014 at 9:58

19 votes

What causes a rotating object to rotate forever without external force—inertia, or something else?

answered Jul 17, 2019 at 0:09

17 votes

Accepted

Would you die if you put your hands on a powerline?

answered May 15, 2012 at 3:48

15 votes

Accepted

Why does mixing every paint colour produce gray instead of white?

answered Feb 16, 2014 at 23:20

15 votes

Questions about space elevators

answered Jun 1, 2023 at 5:00

12 votes

Accepted

Can we feel heat in outer space?

answered Aug 13, 2021 at 10:09

10 votes

Will a bulb glow brighter if voltage is increased but current remains the same?

answered Jul 30, 2016 at 5:27

10 votes

How many atoms exist within a continuum body?

answered Oct 27, 2014 at 9:53

9 votes

Why are there more vertical takeoff than horizontal for spacecrafts?

answered Apr 30, 2012 at 1:59

9 votes

Does life erode Earth's mass over time?

answered Jun 23 at 10:12

8 votes

Why do rockets accelerate fastest horizontally?

answered Jun 4, 2012 at 0:42

8 votes

How feasible is it to power your home with a bicycle?

answered Jul 24, 2016 at 23:17

8 votes

Are moons always smaller than the planets they orbit?

answered Dec 24, 2022 at 23:38

8 votes

Does a glass of water at room temperature emit (infrared?) radiation

answered Aug 19, 2017 at 10:07

7 votes

Accepted

Are gravitons radiated while the massive body turned making Earth orbit unstable?

answered Oct 11, 2023 at 0:40

7 votes

Can (and should) wifi internet be considered a force?

answered Jan 30, 2022 at 23:56

7 votes

Hydrostatic pressure - doesn't density vary with depth?

answered Jun 17, 2014 at 10:44

7 votes

Accepted

Why does deflating baloon spurting through the air make circular motion?

answered Mar 2, 2015 at 9:18

7 votes

Why does a glass breaks when subject to very sharp sound like in opera?

answered Aug 5, 2013 at 11:04

7 votes

Accepted

How can a car's engine move the car?

answered May 18, 2013 at 10:35

7 votes

Accepted

On the Melting of the Arctic Ice

answered Dec 7, 2022 at 2:54

6 votes

Accepted

Spot of my light on the moon

answered Mar 20, 2013 at 11:00

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298 Answers

Given that ice is less dense than water, why doesn't it sit completely atop water (rather than slightly submerged)?

Why is nuclear waste more dangerous than the original nuclear fuel?

Why does thermal radiation only occur at infrared and visible frequencies?

Why is there no magnetic field around a wire connected to electricity at home?

Why does a piece of thread form a straight line when we pull it?

Why is the velocity different for different points on a rolling wheel?

Different batteries connected in parallel

Causes of hexagonal shape of Saturn's jet stream

Why does the speed of light in vacuum have no uncertainty?

What causes a rotating object to rotate forever without external force—inertia, or something else?

Would you die if you put your hands on a powerline?

Why does mixing every paint colour produce gray instead of white?

Questions about space elevators

Can we feel heat in outer space?

Will a bulb glow brighter if voltage is increased but current remains the same?

How many atoms exist within a continuum body?

Why are there more vertical takeoff than horizontal for spacecrafts?

Does life erode Earth's mass over time?

Why do rockets accelerate fastest horizontally?

How feasible is it to power your home with a bicycle?

Are moons always smaller than the planets they orbit?

Does a glass of water at room temperature emit (infrared?) radiation

Are gravitons radiated while the massive body turned making Earth orbit unstable?

Can (and should) wifi internet be considered a force?

Hydrostatic pressure - doesn't density vary with depth?

Why does deflating baloon spurting through the air make circular motion?

Why does a glass breaks when subject to very sharp sound like in opera?

How can a car's engine move the car?

On the Melting of the Arctic Ice

Spot of my light on the moon