1,716 reputation
1825
bio website skepsi.me
location
age 22
visits member for 2 years, 11 months
seen 16 hours ago

Jun
4
comment When will the Moon reach escape velocity?
@Mr. Disappointment: Reach equilibrium in what sense? If the moon's acceleration is to cease (per the standard theory), then the earth's rotation rate will also stop slowing down. That will happen when both bodies become locked to each other, showing the same side at all times. The Pluto-Charon binary system is a good example of this. If that's what you meant, then yes they will reach equilibrium.
Jun
3
comment How are Cepheids used to evaluate their distance?
This reference (pages 11 and 12) that I found states that Zhevakin's discovery was published in 1953 (in Russian).
Jun
3
answered What criteria were used to set the “useme” flag in the NOMAD astrometric catalog?
Jun
2
answered When will the Moon reach escape velocity?
Jun
2
accepted Recommended progression with which to learn physics for fun
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