Score
Title
98
AskScience Panel of Scientists XVIII
549
AskScience AMA Series: I am Melinda Krahenbuhl and I am the director of the Reed Research Reactor, the only nuclear reactor operated primarily by undergraduate students. AMA!
8926
What elements are at genuine risk of running out and what are the implications of them running out?
273
Can you break sound barrier under water or any other material?
4033
What’s the largest star system in number of planets?
22
Why does plastic turn white at the creases when folded/bent?
2
How does radiation poisoning work?
3
How does thermal imaging work?
20
Do microwaves leave residual changes to molecules after heating?
2
How is the height of the mountain measured?
4
Can a setup of hall engines provide enough thrust to keep a satellite stationary above earth?
2
Does the temperature have any (noticable) effect on air resistance?
8
How does a memristor work?
3823
What is the effect, positive or negative, of receiving multiple immunizations at the same time; such as when the military goes through "shot lines" to receive all deployment related vaccines?
4
If a planet had a radius that was equal to the altitude of Earth’s geosynchronous orbit, but had the same mass and rotational period as the Earth now, would there be reduced or zero gravity on the surface?
1
What is lost and what is preserved in a particle collider?
7
Why does snow melt in the sunlight, even when the temperature outside is below freezing?
13
Mar's summer temperature can be 20 celsius. Could a human survive with just an oxygen mask?
3
Is there an altitude at which there is no longer a speed of sound?
0
How would a moving target affect the rate of nuclear fission vs a stationary target?
15
What would a spaceship moving at 0.9c firing lasers both in front of it and behind it look like to an external reference frame?
6
Does adiabatic warming occur when air descends in the Earth's polar cells?
26
How does the cosmic microwave background persist? Why hasn't it been distorted and destroyed by new sources of energy pumping into space?
6
How does cancer metastasis work?
5
Can a comet maintain an atmosphere?
1
How does RFID blocking material work?
0
Does the Meissner effect relate to Lenzs law?
6
Why hasn't The Asteroid Belt formed a planet?
7
Can you use a normal (CMOS) camera for detecting scintillation?
3
How do people know that the Island of Stability exists? And could there possibly be another "island" after it?
58
How can brain cells cause tumours even though they can not multiply?
9
How far back can you go before carbon dating becomes unreliable?
2
How does a computer process “simple” events?
1576
Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
3
What is the nonrenewable fuel cost to produce x quantity of electricity?
1128
What triggers beta particles to form, and for what reason can they not penetrate substantially thick aluminium?
0
What is the strongest a magnet could be?
1234
If capacitance increases as distance between plates decreases, why aren't there very small 1F capacitors?
0
What makes astronomers think life in general isn't possible on gas giants?
2
How applicable are Newtonian Physics in real life? Is it completely false or are there some concepts which can be used to accurately predict real-life situations?
1056
is it possible to move an object in circular motion using magnets?
4
What would hydrogen in metal form look like?
55 Snatch_Pastry Hair follicles generally go through three repeating phases. First, growing, that's pretty obvious, the hair is growing and getting longer. Second, it goes into stasis, where the hair isn't really growing, but is still there. Third, regeneration, where the hair falls out and the follicle gets ready to start growing more hair. Things like arm hair and eyebrows always look the same length because of averages. The stasis period is long compared to growth and regen, so most of the hairs are at the stopped growing phase and you don't really notice the small percentage of falling out/regrowing hair. Of course, the length of these phases vary between individuals, which is why some people have naturally discrete neat eyebrows, and some people have crazy bushy eyebrows. Head hair also does this, but the growth period is usually longer than for hair on other parts of your body. If you just let it grow without cutting it, you would theoretically reach a overall maximum length for your individual hair. Now, because of your hair drying out, splitting, and breaking, it would probably be all shaggy and ragged instead of nice and neat like your eyebrows, but that's beside the point. But there really is a reason that not everyone can grow hair down past their waist.
56 0 Snatch_Pastry Hair follicles generally go through three repeating phases. First, growing, that's pretty obvious, the hair is growing and getting longer. Second, it goes into stasis, where the hair isn't really growing, but is still there. Third, regeneration, where the hair falls out and the follicle gets ready to start growing more hair. Things like arm hair and eyebrows always look the same length because of averages. The stasis period is long compared to growth and regen, so most of the hairs are at the stopped growing phase and you don't really notice the small percentage of falling out/regrowing hair. Of course, the length of these phases vary between individuals, which is why some people have naturally discrete neat eyebrows, and some people have crazy bushy eyebrows. Head hair also does this, but the growth period is usually longer than for hair on other parts of your body. If you just let it grow without cutting it, you would theoretically reach a overall maximum length for your individual hair. Now, because of your hair drying out, splitting, and breaking, it would probably be all shaggy and ragged instead of nice and neat like your eyebrows, but that's beside the point. But there really is a reason that not everyone can grow hair down past their waist.