Volker Siegel's user avatar
Volker Siegel's user avatar
Volker Siegel's user avatar
Volker Siegel
  • Member for 10 years, 1 month
  • Last seen more than a week ago
  • Berlin, Germany
40 votes
2 answers
8k views

In atomic bomb tests under ground, where does the displaced volume of the rocks go?

22 votes
3 answers
4k views

Are fermions and bosons fundamentally different?

18 votes
4 answers
4k views

Why is information "lost" when it got into a black hole?

16 votes
5 answers
7k views

Are there limits for the speed of sound? A maximum or a minimum only?

14 votes
6 answers
2k views

How can energy have inertia?

12 votes
2 answers
8k views

How much of the forces when entering water is related to surface tension?

11 votes
3 answers
4k views

Why can, or can not, a perfectly incompressible fluid exist?

6 votes
1 answer
2k views

How is Earth a magnet while it's volume is mostly above Curie temperature?

6 votes
1 answer
434 views

Can photons move in parallel?

4 votes
2 answers
3k views

If there is vacuum energy, does the vacuum have mass?

4 votes
2 answers
347 views

Antipodes are mostly ocean - so what happens after digging that hole through earth?

3 votes
3 answers
895 views

Why can colors be mixed? [duplicate]

3 votes
0 answers
2k views

Can iron filings on a magnet be removed using a stronger magnet?

3 votes
2 answers
189 views

How can the sky be blue and transparent at the same time, from below and above?

2 votes
2 answers
493 views

How many temperatures has a plasma?

2 votes
1 answer
1k views

What would the surface temperature of the Earth be without the Sun? [closed]

2 votes
2 answers
144 views

Where is the energy involved in osmosis?

2 votes
2 answers
177 views

What can be measured or derived about a remote magnetic field? [closed]

2 votes
1 answer
2k views

How is spring steel so hard?

2 votes
2 answers
162 views

Can gravitational waves be visualized in the elastic rubber sheet model of gravity?

2 votes
0 answers
77 views

Is it cold inside a black hole? [duplicate]

1 vote
1 answer
528 views

How to measure the microscopic surface area of a textile?

1 vote
1 answer
2k views

How do knife blades become dull?

1 vote
2 answers
260 views

Projecting double slit onto fog instead of screen [duplicate]

1 vote
1 answer
312 views

On a dam spillway, where does the potential energy of the water go?

1 vote
1 answer
596 views

How does the color of fine dispersed metal particles change between silver and black?

1 vote
1 answer
117 views

Shape of metal to be heated in consumer microvave oven? [closed]

1 vote
2 answers
553 views

Orientation of spontaneous magnetisation in cooling ferromagnet

1 vote
0 answers
387 views

How can colors from heat tinting depend on temperature only?

1 vote
2 answers
123 views

What does "simultaneously" mean in relation to a detonation shockwave?