Score
Title
378
AskScience Panel of Scientists XVII
78237
Help us fight for net neutrality!
11142
From my kid: Can you put a marshmallow on a stick out into space and roast it with the sun?
16
What would our world look like if the collision which ejected the material from which formed the Moon had not occurred? Would there be liquid water? What kind of atmosphere if any? Active geological processes? Life?
4
[physics] When I turn off my oven but leave the door closed how does the temperature cool?
3
How accurate is the usual picture of the atomic nucleus of a ball/mass of protons and neutrons? What's really happening in the centre of atoms?
42
On my bike: is it more efficient to pedal fast in a low gear or slower in a high gear?
3
How would the government broadcast an emergency message in today's world where a majority of people watch tv through a streaming service?
1
If the Earth is closer to the sun for a part of the year, why isn't that summer MUCH hotter?
1
How do you define the number of conduction electrons?
10
What makes it "impossible" as of now to detect the hypothetical Graviton particle?
9
How are Muscle Knots / Trigger Points Created at the Cellular Level?
2
Can Dark Matter be explained by scale Invariance of empty space?
17
Is deep-earth nuclear fission heating the Earth's interior?
4
How in the world could a particle have a 1/2 spin value?
3371
Hein et al (2017) have explored scenarios for sending a spacecraft to the recently confirmed interstellar asteroid "Oumuamua". What payloads and capabilities would we wish to prioritize on the exploration of this strange and peculiar object?
11
How are doctors able to determine genetic abnormality in a fetus, by testing the mother’s blood?
11
Are all prime numbers smaller than the biggest prime number discovered?
10
What exactly is the Van Allen radiation belt?
6
Why children with adenoditis fall behind in their neurophychiatric development and do they recover in that aspect after the inflammation is gone?
12
Can blue light cause cancer? What about UVA? Where is the threshold?
4
When there is a momentum transfer between two charged particles (via a virtual particle) is that transfer instantaneous?
10
Do cephalopods control their camouflage consciously, if yes how exactly can an animals thought's change it's cells?
15
How does restricting Internet work?
11
Why can't powerbanks charge while being charged?
9
Is it a coincidence that the moons rotation around its axis matches the duration for its revolution around the earth? Or is there some scientific explanation on how these aligned in such a fashion?
7
Ask Anything Wednesday - Engineering, Mathematics, Computer Science
2
Are there any advantages to Removing Net Neutrality that the consumer can enjoy and not ISPs?
4
How does your body heal cuts?
6
How do they know 'Oumuamua is elongated vs of assymetric albedo? (Bonus Question: Is the assumed rotation stable?)
1
What changes when you break the sound barrier?
10
How, or why, do refraction and dispersion occur?
2
Are electrostatic interactions photon-mediated?
2
How does Lebesgue integral put Riemann integral and discrete sums in the same theorical mold ?
25
Why are radio waves and microwaves more damaging to the human body than light waves?
14
In my Psychology textbook it says that cortisol (a result of stress) reduces telomerase activity, therefore speeding up the aging process, however, I know that exercise also releases cortisol, yet is known to combat aging - how?
2
I measured an imaginary component of Earth's magnetic field?
3
Why does water behave like a mirror?
6
Why don't electrons in a superconductor radiate away their energy?
1
Why does the index of refraction of water change with temperature?
14
Why do planets orbit in planes?
18 zeiandren The elements are the elements. It's a list of atoms with one proton and two protons and three protons and so on. There couldn't really be one not on the list. There isn't one hiding between 23 and 24 protons or anything. The ones with atomic numbers higher than about 95 don't happen naturally on earth and are created mostly in labs. They could occur naturally somewhere in space from some high energy process but they all last very small amounts of time so they wouldn't make up planets or anything. There is some theory that if you got to a certain number of protons that was really big you'd get back to making stable elements and no one has tested that. Even that would probably only last a few minutes but sci-fi likes the idea that that could be the location of a really truely unique element we have never seen.
10 Astromike23 One element probably worth mentioning here: Iridium. While iridium is actually fairly common in the whole of the Earth, it's exceptionally rare to find it in Earth's crust; by comparison, gold is about 40 times more common. There are two reasons for this: - Iridium is one of the very densest elements (basically tied with Osmium), so it tends to sink. - Iridium is a "siderophile" element, so it easily dissolves in liquid iron. The combination of these two things means that when Earth was forming, heating, and differentiating, almost all of the original iridium sank deep down into Earth's liquid iron core, and has been locked away there to this day. In general, if you find iridium at the surface, it almost always came later from a meteorite impact. In fact, it's a very reliable indicator of past impacts: there's a clear iridium-rich layer of rock right at the K-T boundary, the impact responsible for wiping out the dinosaurs.
21 0 zeiandren The elements are the elements. It's a list of atoms with one proton and two protons and three protons and so on. There couldn't really be one not on the list. There isn't one hiding between 23 and 24 protons or anything. The ones with atomic numbers higher than about 95 don't happen naturally on earth and are created mostly in labs. They could occur naturally somewhere in space from some high energy process but they all last very small amounts of time so they wouldn't make up planets or anything. There is some theory that if you got to a certain number of protons that was really big you'd get back to making stable elements and no one has tested that. Even that would probably only last a few minutes but sci-fi likes the idea that that could be the location of a really truely unique element we have never seen.
8 0 Astromike23 One element probably worth mentioning here: Iridium. While iridium is actually fairly common in the whole of the Earth, it's exceptionally rare to find it in Earth's crust; by comparison, gold is about 40 times more common. There are two reasons for this: - Iridium is one of the very densest elements (basically tied with Osmium), so it tends to sink. - Iridium is a "siderophile" element, so it easily dissolves in liquid iron. The combination of these two things means that when Earth was forming, heating, and differentiating, almost all of the original iridium sank deep down into Earth's liquid iron core, and has been locked away there to this day. In general, if you find iridium at the surface, it almost always came later from a meteorite impact. In fact, it's a very reliable indicator of past impacts: there's a clear iridium-rich layer of rock right at the K-T boundary, the impact responsible for wiping out the dinosaurs.