Reputation
1,954
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
2 13 34
Impact
~124k people reached

  • 0 posts edited
  • 3 helpful flags
  • 136 votes cast
Jun
2
answered When will the Moon reach escape velocity?
Jun
2
answered Why can we see the cosmic microwave background (CMB)?
Jun
1
comment Why don't more rocky planets/moons have appreciable atmospheres?
Titan's atmosphere is huge, yet it is smaller than Ganymede, which has the highest mass of any moon. Why doesn't Ganymede have an appreciable atmosphere?
Jun
1
answered Which is the strongest meteor shower expected in the next years in the Northern hemisphere?
Jun
1
comment What nonlinear deformations will a fast rotating planet exhibit?
@Zassounotsukushi: One thing to note is that the diagram of the dumbbell shape formation is based on the idea that there are two axes of rotation. A rapidly rotating planet has only one axis of rotation.
Jun
1
comment Recommended progression with which to learn physics for fun
Ah, thank you, that sounds highly interesting. I will most definitely take a look at that. From your description, it seems like the physics portion of the book start somewhat mid-level and doesn't cover Newtonian mechanics, or nuclear physics, etc. If that is the case, then I would probably use a more general-purpose book at first before jumping into this. In general, though, it sounds like a highly enjoyable read.
Jun
1
comment Recommended progression with which to learn physics for fun
@Michael: It's quite pathetic, in fact. High-school level trigonometry and algebra, along with some college-level pre-calculus. Math as a subject has never been difficult for me (yet), but I haven't been able to study much after high school.
May
31
asked Recommended progression with which to learn physics for fun
May
28
accepted Why does the road look like it's wet on hot days?
May
27
comment Are scientists missing the point with distant cosmic objects, or is it just me?
@Colin: I may be misunderstanding something, but I don't think my original point disagrees with yours: that galaxies, given enough space between them, can in fact appear to move faster than the speed of light.
May
27
comment Why does the road look like it's wet on hot days?
@AttackingHobo, @Lagerbaer: Particularly, the link to Wikipedia that Henry gave identifies this effect as an inferior mirage- that is, "inferior" because the image is produced underneath the actual object. It also appears that the Fata Morgana is in fact a superior mirage.
May
27
comment Are scientists missing the point with distant cosmic objects, or is it just me?
@Colin: Then what is speed relative to? I kind of assumed that the twin paradox illustrated the point that it could not simply be relative to two objects.
May
26
asked Why does the road look like it's wet on hot days?
May
26
comment Are scientists missing the point with distant cosmic objects, or is it just me?
@Anonymous: That's not quite right. It's not that two masses can't move away from each other faster than c, but rather that a massive particle can't move relative to space faster than c. That means that you cannot accelerate a massive particle to the speed of light, but, for example, you can accelerate two particles to 99% of c, and shoot them in opposite directions. At that point, they are moving away from each other at a rate faster than c, but they themselves can never reach c.
May
24
comment Explanation of “thermite vs ice” explosion
Unfortunately, there doesn't seem to be a definite scientific study done on the cause. There are some logical explanations, as phycker pointed out, but unfortunately, it seems that mankind hasn't done every experiment there is to do, yet. :]
May
24
comment How does reflection work?
Ah, interesting. I think the last paragraph was probably the most helpful. And, as I keep reading everyone, it seems like looking up Mr. Feynman's talks and publications is a good way to learn more about QM in general. :D
May
24
accepted How does reflection work?
May
23
comment How does reflection work?
@Bjorn: So, from what I understood, photons are indeed absorbed and re-emitted during reflection. Why is it, then, that the angle of incidence is equal to the angle of reflection? Logically, there must be a finite amount of time that the electron holds on to the energy. When it is radiated away, why is it not in a random direction?
May
23
asked How does reflection work?
May
23
comment Is there a good chance that gravitational waves will be detected in the next years?
@Jerry: Alright. I suppose that I was mainly thinking of Einstein@Home when I thought of data analysis. From what I understand, its search algorithm uses matched-filtering to detect continuous wave sources, not coalescing compact binaries. This PDF lists the sensitivities for various GW sources. Notably, continuous wave sources are order of magnitude lower in amplitude.