Score
Title
552
AskScience Panel of Scientists XVII
440
AskScience AMA Series: I am a squid biologist, AMA!
6909
What exactly is happening to your (nerves?) when circulation gets cut off and you start to tingle?
5831
At what point is a particle too small to cast a shadow?
21
Has Alzheimer's ever been observed in animals?
12
What exactly do they do with your body when you die, if you're an organ donor?
4
Do plants require constant nutrition or do they eat in cycles?
20
How does quantum mechanics explain covalent bonds?
5
If 1+2+3+... can be "regularised" to -1/12, does it follow that 1+4+9+... can be 0 or that 1+8+27+... can be 1/120?
178
How do most wild animals die?
4
How come water does not flow deep into our ear canal?
6
What percentage of the light that hits your retina is actually absorbed by it?
7
Why are long things flexible while short pieces of the same object are rigid?
3
How do zookeepers avoid accidentally domesticating animals in zoos?
90
What do scientists mean when they say "We only know what makes up 5% of the Universe"? What makes up the other 95% of the Universe and how come we don't know what it is ?
3
How do radiators know when the room has achieved the set temperature?
6
How do we know that climate change is caused by humans?
4063
How do our bodies build a tolerance to alcohol?
3
Is there any sort of concept of a genomic efficiency, i.e., is there any benefit to having a higher ratio of coding DNA to junk DNA?
3
If electrons behave so sporadically, how can scanning electron microscopes have such clarity of resolution?
1
How does letting a dish soak with soap and water work?
7
How does Lake Victoria replenish itself as the source of the entire Nile river which flows out and empties into the Mediterranean?
2
Would a wire or antenna, where a signal with 550THz is sent through, radiate light?
11
How exactly does White Blood Cell detect bacteria ?
0
If a person somehow was able to get to the surface of a gas planet, let’s say Jupiter, would they be able to walk on the surface or would they fall through?
67
Is there a way to measure sharpness - like a scale of sharpness? Thank you
0
Why does Marathon running cause toxin buildup in the Kidneys?
0
If a man has a stroke, does it have any effect on the quality of his sperm?
18
What prevents people in the United States from contacting Malaria from mosquito bites?
320
Does the temperature of air effect the distance sound can travel?
0
Can you "catch" helium?
0
Do oil pipe lines have a problem with the pipes expanding do to heat?
3
What happens inside a cats’ body when it ‘fluffs up’ as a result of being threatened? Also, is it an automatic response?
14
When I drop an insect (I.e an ant) from a large height (relative - from my chest to the ground), does it “hurt” as bad as it would for us?
6
If electrons move in a copper wire not by each electron travelling all the way, but by bumping into the one ahead and pushing it forward, how can electricity travel faster than the speed of sound of copper?
9
Why does tungsten (and the elements around it) have a high melting point?
6453
Why is the Liver one of the only organs that grows back when most of it is removed?
3
Why does diabetes causes kidney damage?
276
Since the W and Z bosons that mediate the weak force are not massless, does that mean that the weak force does not propagate at light speed?
8
What is the Furry hypothesis, in relation to quantum superposition, and why is it incorrect?
17
How is a breathalyzer a useful metric when testing blood alcohol content?
0
Why are planets rotational axis usually (approximately) orthogonal to their sun (since Planets like Uranus are seen as "wierd")?
16 vondage Conservation of angular momentum explains why liquid spins faster the closer it gets to the drain, but it doesn't explain why the liquid starts spinning in the first place. In principle, you could have a reservoir drain liquid without spinning whatsoever. So why then does it always spin in the real world? Well that's because the real world isn't so perfectly symmetric, like in the ideal case. This means that there's a good chance some liquid will fall down the drain at an angle, as opposed to straight down. The liquid that falls at an angle will push on the liquid next to it, which in turn pushes on the next bit of liquid and so on, all around in a circle. This effect reinforces itself, and so even a tiny amount of asymmetry will determine the net spin. What’s important is to realize is that liquids are sticky, especially water, and so there’s not just pushing going on, but pulling too. Not only that, but a spin that starts further down the drain can propagate upward and affect the water that has yet to fall in. This happens for the same reason, because water is sticky, and so it’s best to visualize it not as a huge number of individual particles, but more as a stretchy interconnected substance. This is exaggeratory, but it explains how spins begin.
15 0 vondage Conservation of angular momentum explains why liquid spins faster the closer it gets to the drain, but it doesn't explain why the liquid starts spinning in the first place. In principle, you could have a reservoir drain liquid without spinning whatsoever. So why then does it always spin in the real world? Well that's because the real world isn't so perfectly symmetric, like in the ideal case. This means that there's a good chance some liquid will fall down the drain at an angle, as opposed to straight down. The liquid that falls at an angle will push on the liquid next to it, which in turn pushes on the next bit of liquid and so on, all around in a circle. This effect reinforces itself, and so even a tiny amount of asymmetry will determine the net spin. What’s important is to realize is that liquids are sticky, especially water, and so there’s not just pushing going on, but pulling too. Not only that, but a spin that starts further down the drain can propagate upward and affect the water that has yet to fall in. This happens for the same reason, because water is sticky, and so it’s best to visualize it not as a huge number of individual particles, but more as a stretchy interconnected substance. This is exaggeratory, but it explains how spins begin.