Reputation
3,376
Next privilege 5,000 Rep.
Approve tag wiki edits
Badges
1 4 11
Impact
~186k people reached

  • 0 posts edited
  • 0 helpful flags
  • 25 votes cast
12h
answered How can “…electrons flow in metals, but not in the ground…” explain grounding rods?
Jan
28
revised Negatively charged ball orbiting positively charged ball in space?
added 91 characters in body
Jan
27
answered Negatively charged ball orbiting positively charged ball in space?
Jan
20
comment Why do most office chairs have 5 wheels?
Try leaning back on chairs with 4 and 5 wheels. You'll find that the 4 wheel one is far easier to tip. So the question is: why do normal chairs only have 4 legs?
Jan
10
answered At What Point Does Mass Cease to Matter?
Dec
24
answered If the earth is spinning and we are spinning with the earth, why doesn't it take longer to go opposite the rotation?
Dec
21
answered How does a physical knock initiate freezing of supercooled water?
Dec
21
comment Why do distant galaxies (quasars) look white in photos?
These days, most astronomy "photos" are in false colour. Unless the photo is actually taken in visible light, it has to be so. Also, in many cases, they are a combination of several images take with different sensors (visible, IR, UV, etc).
Dec
10
answered Is there any friction between wheel and road?
Nov
28
comment How do we know that supermassive black holes formed in the early universe?
"Cosmic Egg" and "primeval atom" were George Lemaitre's (Belgian cosmologist) names for what later became the Big Bang. He published his ideas in 1927 as a solution to Einstein's equations for GR. It was not taken seriously at the time, least of all by Einstein himself.
Nov
19
comment Why gravitational collapse always end up in a black-hole singularity?
I don't understand your question, but the answer to the title is clear: gravitational collapse does not always end up in a singularity. That only happens if there is enough mass. With less mass, you get a white dwarf or a neutron star.
Nov
17
revised Suppose I apply a force to a ball that can then only be slowed down by gravity or, perhaps, relativity. What happens to the ball? What would I see?
added 32 characters in body
Nov
17
answered Suppose I apply a force to a ball that can then only be slowed down by gravity or, perhaps, relativity. What happens to the ball? What would I see?
Nov
15
revised Can electricity flow in a sufficiently large insulator?
edited body
Nov
15
comment White Laser Light
But they're pumped by a monochromatic laser - and they're not lasers
Nov
12
answered Can electricity flow in a sufficiently large insulator?
Nov
11
answered White Laser Light
Nov
9
comment How does pressure increase underwater?
@Mark Foskey. Thanks for clarifying that.
Nov
9
answered How does pressure increase underwater?
Nov
8
comment What would be the minimum size of a planet which would allow a human being to walk around without falling out in the open space?
Fixed that one too, honeste. Just shows I'd make a lousy proofreader