How do stains work on the molecular level? |
- How do stains work on the molecular level?
- How do directions work in space?
- What is the social behavior of tardigrades? Do and if so, how do tardigrades interact with one another?
- How did the Apollo spacecrafts get past the Van Allen Radiation belt?
- Do animals have a dominant "hand" like humans do?
- In deserts and beaches, why do dunes form instead of the sand uniformity flattening out?
- Correlation vs. covariance difference?
- What happens in the digestive system of animals that eat other animals whole?
- How does the subducted oceanic lithosphere retain its shape and form in the asthenosphere?
- Did we learn anything new about Jupiter from Shoemaker/Levy 9 colliding with it?
- Are there cryovolcanos on Titan?
- Given a completely sealed, non-insulated container filled with liquid nitrogen, would the container be cold forever?
- Why are some tumours benign and other tumours not benign in the human body?
- What do we know about dark matter and dark energy during the big bang?
- How are this sort of rocky boulder hills formed?
- How come some avian pathogens can pass so easily to primates like us? Is there some Immunological similarity?
- With how popular renewable energy is becoming why do we hear so little about superconducting power cables?
- Why does albinism appear across species?
- Why is the asteroid belt a ring and not a bubble?
- How much space is there in between particles in a gas cloud in space that is many light years in size?
- Why do tank treads have to be asymmetrical to drive straight?
| How do stains work on the molecular level? Posted: 11 Feb 2018 04:37 PM PST How are the particles that become stuck on clothing so difficult to remove? And as a follow up question, how do stain removers work? [link] [comments]  |
| How do directions work in space? Posted: 11 Feb 2018 04:30 PM PST On Earth we have north, south, east, and west, but those are relative to Earth. What directions, if any, do people use for space? [link] [comments]  |
| Posted: 12 Feb 2018 05:32 AM PST Googling doesn't answer that question and the literature on Google Scholar and pubmed is too high of a threshold to dig through for me as a layperson. [link] [comments]  |
| How did the Apollo spacecrafts get past the Van Allen Radiation belt? Posted: 11 Feb 2018 02:02 PM PST Had a family friend tell me about this and I wanted to know if you guys have the answer to this . [link] [comments]  |
| Do animals have a dominant "hand" like humans do? Posted: 12 Feb 2018 12:00 AM PST |
| In deserts and beaches, why do dunes form instead of the sand uniformity flattening out? Posted: 11 Feb 2018 08:08 PM PST |
| Correlation vs. covariance difference? Posted: 12 Feb 2018 02:01 AM PST I get all that so far. So they're 2 different tools that perform the same job. Besides the cases of having different measurements, which covariance is unable to do, 1) why would any prefer covariance over correlation or vice versa? In what situation would be more fitting to use one over another? 2) so what does the numerical result in covariance means? I know if it's positive or negative than it's related or inversely related - same for correlation. In corrl, we can intuitively understand that 0.5 means if A moves by 1 B moves by 0.5. But it doesn't explain what the number means in covariance. 3) why do we need both? [link] [comments]  |
| What happens in the digestive system of animals that eat other animals whole? Posted: 11 Feb 2018 08:59 PM PST When an animal eats another animal whole, what happens in the stomach of the predatory animal? It's difficult to imagine an entire prey animal stuffed into a stomach and digested without any complication or interesting process behind it. Edit: word. [link] [comments]  |
| How does the subducted oceanic lithosphere retain its shape and form in the asthenosphere? Posted: 12 Feb 2018 06:19 AM PST From what I saw on the diagrams used for subduction zones, oceanic lithospheres stay solid even under hundreds of kilometers in the mantle, but how does it survive the intense heat without melting thoroughly? [link] [comments]  |
| Did we learn anything new about Jupiter from Shoemaker/Levy 9 colliding with it? Posted: 11 Feb 2018 01:58 PM PST Follow-up: If it occurred today, would modern instruments have gathered any extra, meaningful data from it? [link] [comments]  |
| Are there cryovolcanos on Titan? Posted: 11 Feb 2018 06:25 PM PST I read a few years ago that there was a debate in the scientific community for the presence or absence of cryovolcanoes on Titan, with some pointing to images taken by Cassini as evidence for past cryovolcanic activity. Is there currently any sort of consensus on this issue? [link] [comments]  |
| Posted: 11 Feb 2018 04:55 PM PST If the theoretical airtight container existed to contain liquid nitrogen in perpetuity, what would happen to the liquid nitrogen over time? Would the walls of the container continue to be cold forever? [link] [comments]  |
| Why are some tumours benign and other tumours not benign in the human body? Posted: 11 Feb 2018 04:47 PM PST |
| What do we know about dark matter and dark energy during the big bang? Posted: 11 Feb 2018 07:15 PM PST I understand the theory that all known matter was in a singularity 14 or so billion years ago and dark matter hasn't been directly observed, but is the prevailing evidence it was in the singularity as well? Are there ideas out there that suggest otherwise? [link] [comments]  |
| How are this sort of rocky boulder hills formed? Posted: 11 Feb 2018 11:19 PM PST Hi reddit, i live in an area with many rocky hills, my pals and i have always wondered how they were formed. I have a bet that the area was under water many years ago!. https://bucketlist.co.ke/travel/uploads/2017/04/Lukenya-5.jpg [link] [comments]  |
| Posted: 11 Feb 2018 01:08 PM PST |
| Posted: 12 Feb 2018 02:31 AM PST From my understanding the big problem with superconductors is that you need to cool them down to a very low temperature, however that seems like a static loss largely regardless of how much energy you send through them. So why don't we have/are working on intercontinental cables between Asia, Europe,Africa and maybe even under the sea to Australia and the Americas to transport renewable energy through. The sun is always shining somewhere on earth so wouldn't this be a good alternative to trying to store the energy? I know that they tried it in Essen but haven't heard about any attempts to scale that up [link] [comments]  |
| Why does albinism appear across species? Posted: 11 Feb 2018 06:57 PM PST I saw a picture of an albino animal and was curious as to how different species all have a similar genetic mutation. It was especially puzzling considering it would be a disadvantage in terms of hiding. So how do a multitude of species have some individuals with very similar genetic defects namely albinism? [link] [comments]  |
| Why is the asteroid belt a ring and not a bubble? Posted: 11 Feb 2018 10:05 PM PST Space is obviously 3D, so why does the asteroid belt seem to be on a plane. Follow up Question: are the planets on the same plane as well? [link] [comments]  |
| Posted: 11 Feb 2018 06:59 PM PST Suppose I'm floating within one of these gas clouds. Would it seem foggy or would it appear no different then if I was an an empty area of space? [link] [comments]  |
| Why do tank treads have to be asymmetrical to drive straight? Posted: 11 Feb 2018 02:05 PM PST This may be outdated, but I'm reading Boys for Men, a memoir of a Vietnam era tank driver who was on m48s and sheratons later. He Talks about removing one tread block from one side when he gets the Sheraton, because it makes it "toe in" and drive straight. The other guys with less training didn't do this and their tanks had trouble. I kind of vaguely know what toe is on a car, but I'm not sure how this removing a block changes the toe on a tread. Or, really, why don't the tank designers do this or add an adjustment mechanism so the grunts aren't repairing the treads in the jungle. [link] [comments]  |
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