Score
Title
86
AskScience Panel of Scientists XVIII
273
AskScience AMA Series: "I am Rhett Allain, physicist and technical consultant on Mythbusters and MacGyver. Ask me about the physics of pretty much anything!
150
Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
135
is it possible to move an object in circular motion using magnets?
37078
Why is it that during winter it's not uncommon to have days with abnormally high temperature and summer-like weather, but in the summer it never drops to winter-like weather for a day?
56
What triggers beta particles to form, and for what reason can they not penetrate substantially thick aluminium?
70
If capacitance increases as distance between plates decreases, why aren't there very small 1F capacitors?
27
What happens to the spin of an electron when it leaves a nucleus?
48
If the moon was created from an impact with Earth, could there be “Earth rocks” deep within the Moon?
56
Whats the truth about applying water to burns? Will cold water cause it to blister or stifle it? What about lukewarm water?
3
Have animals been observed using facial expressions to communicate among themselves?
217
If 2 people dislike the same food, are they then more likely to dislike other similar foods?
27
If both the liver and the kidney are filtering organs, what are their different responsibilities? Are there other organs that perform similar functions?
12
Why do martian rovers last so much longer than planned?
29
Are there positions of a chess board that are impossible to achieve legally?
18
Are there any materials that only allow radio waves to pass through in one direction?
1
Why are the characteristic lines from X-Rays limited by a lower AND UPPER energy?
3
How did chemists determine the structures of molecules before they had high power microscopes?
13
Why does water make paper products translucent?
61
Does the Mach Cone occurs only appears when crossing the 1 Mach speed or it can also appear later during the supersonic flight (> 1 Mach)?
5
How exact do orbital speeds need to be so you don't fly off into space (too fast) or fall into the atmosphere (too slow)?
29
What was going on in the science community when the first dinosaur bones were discovered? Did we realize early on what we were looking at? What was the attitude of the community towards the discovery?
5
How are the eggs of birds formed and what is the process called? Are they formed to the size that they are eventually hatched?
9
Is there a theoretical limit to how many protons an atom can contain?
5
What physically happens inside a computer when it crashes or freezes?
21
Could a planet with a highly eccentric orbit be tidally locked?
1
How do scientists assess/prove the age of ancient foot prints?
12
At what frequency does a repetitive sound become a solid sound?
549
Can dogs observe and recognize aging in adult humans? Do they differentiate between young adult, middle-aged and elderly humans?
14
Does the gravitational force of the sun and moon affect the atmosphere the same way it affects the tide? Is there an increase in oxygen during high tide/low tide?
0
I was never able to tune a guitar using my ear. Yesterday i did it out of the blue without practice. What happened to my brain?
9
Why are there so few species of mammals?
2
Can an oil reservoir "blow out" on its own with no human interaction?
25
Why don't the palms of our hands and the soles of our feet tan or burn?
1
Is energy gain relative?
15
Is it possible to trigger or "activate" a volcanic eruption?
2
How uneven can London Dispersion Forces make an atom?
6
Are there any known mutations in drosophila melanogaster that cause a phenotype of folded downward wings?
0
If Earth were larger, would it move closer to the sun or farther away?
9
Are blood bags usually sealed (in a vacuum)?
11004
When does a mushroom die? When it's picked? When it's packaged? Refrigerated? Sliced? Digested?
14
When you physically break or shatter a flash storage chip, to what degree is the data still readable from the fragments?
22 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.
9 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.
20 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.
10 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.