User Solomon Slow

79 votes

Accepted

Supergun Launching of Satellites

answered May 25, 2016 at 17:31

62 votes

Accepted

Why are the number of magnetic field lines finite in a particular area?

electromagnetism magnetic-fields terminology integration vector-fields

answered Jul 19, 2020 at 12:21

51 votes

Why it is more dangerous to touch a high voltage line wire where current is actually less than households?

electricity electric-circuits electric-current electrical-resistance voltage

answered Dec 30, 2020 at 14:07

50 votes

Accepted

Is a classical laser possible?

quantum-mechanics laser classical-electrodynamics

answered Feb 25, 2020 at 16:32

43 votes

Accepted

Is it possible to sail "close hauled" with a solar sailship?

space-travel solar-wind

answered Mar 11, 2015 at 17:29

40 votes

Do we know why there is a speed limit in our universe?

special-relativity speed-of-light

answered Jan 21, 2016 at 14:50

40 votes

How do stars produce energy if fusion reactions are not viable for us?

astrophysics fusion binding-energy

answered Oct 28, 2021 at 14:32

27 votes

Accepted

In Maxwell's demon, why are all the cold gas molecules on the same side?

thermodynamics statistical-mechanics entropy

answered Jul 20, 2020 at 19:44

21 votes

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

electric-circuits electric-current electrical-resistance voltage electrical-engineering

answered Jun 13, 2021 at 14:08

16 votes

Would visible light still be in a separate classification if we saw "colors" in a different wavelength?

visible-light frequency wavelength vision

answered Feb 9, 2020 at 19:13

13 votes

Accepted

If atoms are mostly empty space, why doesn't light pass through everything?

visible-light atoms matter

answered May 12, 2015 at 21:39

9 votes

Accepted

What would happen if you left Earth and then it was destroyed? (Potential energy and thermodynamics)

thermodynamics energy-conservation potential-energy explosions

answered Feb 11 at 20:07

8 votes

Accepted

Satellite image anomaly

optics geometric-optics satellites image-processing

answered Sep 17, 2019 at 16:13

7 votes

In a double slit experiment, does each and every photon leave a dot on the screen in the bright area?

quantum-mechanics electromagnetism photons double-slit-experiment

answered Oct 7, 2019 at 18:50

7 votes

How can be the neutral wire at 0 volts when current flowing through it?

electricity electric-circuits electric-current voltage

answered Aug 11, 2015 at 14:32

7 votes

Accepted

Could a nuclear bomb be used as a replacement for gunpowder in a giant cannon made out of diamond?

pressure nuclear-physics material-science explosions diamond

answered Jan 6 at 22:36

7 votes

Why don't we get a shock touching neutral wire?

electricity electric-circuits electric-current electrical-resistance voltage

answered Nov 17, 2020 at 13:56

7 votes

How can we discern so many different simultaneous sounds, when we can only hear one frequency at a time?

waves acoustics frequency biology perception

answered Jan 12, 2021 at 22:08

7 votes

How does rubbing soap on wet skin produce foam, and does it really enhance cleaning?

fluid-dynamics everyday-life water surface-tension bubbles

answered Jan 27, 2021 at 1:10

6 votes

Why liquid helium boils as its temperature is lowered?

thermodynamics condensed-matter phase-transition low-temperature-physics

answered Nov 13, 2021 at 17:00

6 votes

Why does a drop in resistance lead to a drop in voltage?

electric-circuits electric-current electrical-resistance voltage batteries

answered Oct 30, 2021 at 19:42

6 votes

Why Jet fighters don't heat up like spacecrafts?

thermodynamics aerodynamics aircraft gas

answered Apr 12, 2017 at 13:42

6 votes

How does this optical illusion work?

optics biophysics

answered Apr 13, 2017 at 19:58

6 votes

Since voltage determines an electron's energy, why is it current rather than voltage that is harmful?

electricity electric-current voltage

answered Apr 6, 2018 at 13:36

5 votes

Accepted

What it sounds like when I'm travelling at the speed of sound

waves acoustics shock-waves

answered Oct 28, 2015 at 21:54

5 votes

Why does a higher wattage incandescent light bulb have a lower resistance value than a lower wattage incandescent light bulb?

electric-circuits electric-current electrical-resistance voltage power

answered Feb 19, 2016 at 19:20

5 votes

Accepted

What colour would a green object appear in orange light?

visible-light reflection

answered Nov 30, 2019 at 18:43

5 votes

Accepted

Will water in vacuum stop boiling?

thermodynamics pressure vacuum evaporation condensation

answered Mar 15, 2021 at 12:47

5 votes

Feeling heavy in an upward accelerating elevator - is it a pseudo force?

newtonian-mechanics reference-frames acceleration inertial-frames

answered Jan 12, 2021 at 14:38

5 votes

Accepted

What if I left Earth then turned it into light?

general-relativity energy gravity photons mass-energy

answered Feb 23 at 18:51

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242 Answers

Supergun Launching of Satellites

Why are the number of magnetic field lines finite in a particular area?

Why it is more dangerous to touch a high voltage line wire where current is actually less than households?

Is a classical laser possible?

Is it possible to sail "close hauled" with a solar sailship?

Do we know why there is a speed limit in our universe?

How do stars produce energy if fusion reactions are not viable for us?

In Maxwell's demon, why are all the cold gas molecules on the same side?

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

Would visible light still be in a separate classification if we saw "colors" in a different wavelength?

If atoms are mostly empty space, why doesn't light pass through everything?

What would happen if you left Earth and then it was destroyed? (Potential energy and thermodynamics)

Satellite image anomaly

In a double slit experiment, does each and every photon leave a dot on the screen in the bright area?

How can be the neutral wire at 0 volts when current flowing through it?

Could a nuclear bomb be used as a replacement for gunpowder in a giant cannon made out of diamond?

Why don't we get a shock touching neutral wire?

How can we discern so many different simultaneous sounds, when we can only hear one frequency at a time?

How does rubbing soap on wet skin produce foam, and does it really enhance cleaning?

Why liquid helium boils as its temperature is lowered?

Why does a drop in resistance lead to a drop in voltage?

Why Jet fighters don't heat up like spacecrafts?

How does this optical illusion work?

Since voltage determines an electron's energy, why is it current rather than voltage that is harmful?

What it sounds like when I'm travelling at the speed of sound

Why does a higher wattage incandescent light bulb have a lower resistance value than a lower wattage incandescent light bulb?

What colour would a green object appear in orange light?

Will water in vacuum stop boiling?

Feeling heavy in an upward accelerating elevator - is it a pseudo force?

What if I left Earth then turned it into light?