How did we first find out there was no oxygen in space? |
- How did we first find out there was no oxygen in space?
- Is the great attractor actually a real thing or is there just a lot of stuff there?
- Why does water damage electronics?
- Is there a physical limit to how fast a human being can run?
- According to a source in 2004; "No prehistoric remains have been found of people older than 50 years". Is this still true?
- What is the significance of kB*T (Boltzmann constant multiplied by temperature) in physics / quantum mechanics?
- Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart?
- What is that feeling we get when we want to sneeze but can't. What exactly is going on in our noses at that time?
- How do sperm find eggs?
- What's the difference between the "heat death" and "Big Rip" models of the ultimate fate of the universe?
- Is the electroweak force mediated by a carrier other than a photon, W, or Z boson, or does it simply not matter which of the three is mediating a particular interaction?
- Why doesn’t kangaroo blood clot?
- How do great white sharks mate?
- Why are elevators placed at the rear of planes, and not at the front?
- Does space equipment get dirty in space ?
- How are carbon nanotubes made? And are there ways for them to be made commercially?
- How did the transition to an amniotic egg happen?
- Is there a statistically significant difference in any variable depending on the season of the year you were born?
- What has the biggest effect on the nutrition of a fruit/vegetable?
- How are some plants able to survive without direct sunlight, or little to no sunlight at all?
- Why are 2D hexagonal arrays more stable than square or triangular arrays?
- When an airlock gets opened and the contents of a ship or station rush out into space, what happens to the air?
- At which point was Van der Waals' equation necessary for Onnes' work in liquefying helium?
| How did we first find out there was no oxygen in space? Posted: 15 Apr 2018 03:55 AM PDT |
| Is the great attractor actually a real thing or is there just a lot of stuff there? Posted: 15 Apr 2018 04:02 AM PDT If you look at the shape of the matter in the universe, it's a web of clusters. I don't really think it's a black hole or anything, but it's more like so much stuff in these clusters that it's bending space and causing galaxies like ours which is like rural hick zone to fall in and eventually join into these dense areas or something. [link] [comments]  |
| Why does water damage electronics? Posted: 14 Apr 2018 07:56 PM PDT |
| Is there a physical limit to how fast a human being can run? Posted: 14 Apr 2018 10:53 AM PDT |
| Posted: 14 Apr 2018 08:06 AM PDT According to Hayflick L. "Anti-aging" is an oxymoron. J Gerontol A Biol Sci Med Sci. 2004 Jun;59(6):B573-8. No prehistoric remains have been found of people older than 50 years. Question a) is this true and b) if yes, is it still true in 2018? [link] [comments]  |
| Posted: 15 Apr 2018 04:45 AM PDT Learning basic quantum mechanics for chemistry, I have read that only energy levels with energies "less than or comparable to kB*T" are only populated significantly at temperature T. Why is this? As kB*T is such a low value (~4.12E-21 J), does it follow that, at 298 K, only in translational wavefunctions is there a significant population of excited states, whereas only the zero point energy is significantly populated in rotational/vibrational wavefunctions? [link] [comments]  |
| Posted: 14 Apr 2018 06:40 PM PDT Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart? For example, a proton and neutron would go together fine with the strong force, but a proton and another proton won't fit in together because of the electrostatic force. I'm not an expert, but I feel this is a simple scenario that a high school student could fit in together. [link] [comments]  |
| Posted: 14 Apr 2018 10:17 AM PDT |
| Posted: 14 Apr 2018 04:51 PM PDT |
| Posted: 14 Apr 2018 01:05 PM PDT (Prefacing this with: I'm not a professional science person, I just love me a bitta space. I'm working on a prose-poem-y thing about anonymous sex and end-of-universe scenarios and I like to think I know a reasonable amount about both, but I only really have first hand experience of one of them and want to be as accurate as I can in the other.) I thought I understood the idea pretty well: flat curvature, accellerated expansion, increased ratio of dark energy to regular matter and dark matter, things getting further away from each other, galaxies and solar systems and individual objects split apart, shit burns out, shit Hawking radiates away, atoms split apart, individual particles are on their own and to far away from each other to possible have any further causal relation to each other, everything is cold and boring and sad, no more pizza, yadda yadda yadda. But I keep seeing them listed as two distinct models. Is it that they're kind of similar or overlap? Or are they mutually incompatible in some way that's gone over my head? [link] [comments]  |
| Posted: 14 Apr 2018 12:52 PM PDT If it is a new boson, then does that mean that a photon, W, or Z boson could transform into this new boson by gaining energy, and turn back into any of the 3--not necessarily the same as before--if it lost energy? [link] [comments]  |
| Why doesn’t kangaroo blood clot? Posted: 14 Apr 2018 09:45 AM PDT I was watching a nature documentary and they were doing surgery on a kangaroo, and mentioned that kangaroo blood doesn't clot. They didn't say why this was, and google turned up no results. It seems like clotting blood is a critical thing, since a small cut could lead to a kangaroo bleeding to death. Why doesn't this happen? [link] [comments]  |
| How do great white sharks mate? Posted: 14 Apr 2018 05:16 PM PDT |
| Why are elevators placed at the rear of planes, and not at the front? Posted: 14 Apr 2018 12:50 PM PDT |
| Does space equipment get dirty in space ? Posted: 14 Apr 2018 09:57 AM PDT All kinds of equipment needs regular cleaning from things that get deposited on them, specific to which environment its in. Does the same go for the space station or the the canadarm? Would the effect of these objects in the vacuum of space be strong enough to attract dust and other things? Is there even enough stuff in space to deposit on the equipment for it to matter? [link] [comments]  |
| How are carbon nanotubes made? And are there ways for them to be made commercially? Posted: 14 Apr 2018 10:09 PM PDT |
| How did the transition to an amniotic egg happen? Posted: 14 Apr 2018 10:22 AM PDT I can't seem to understand the logistics of how egg hatching can evolve. It's not like one generation is born in water, then evolved to lay an egg on land. What was the transition like from water egg to land egg? was there an in between that I don't know about? [link] [comments]  |
| Posted: 14 Apr 2018 09:02 AM PDT Like a stronger immune system? A higher likelihood of having certain traits? [link] [comments]  |
| What has the biggest effect on the nutrition of a fruit/vegetable? Posted: 14 Apr 2018 09:34 AM PDT I've seen some people stating that our food has become less nutritiously dense over time. Is this true? I believe they specifically are talking about the vitamins and minerals, not just calories. 2004 Article 2009 Article Is it because food is now picked weeks before consumption (to be shipped to stores) and loses nutrition over time? or Does a crop grown in "dead" soil that is fertilized with "traditional" chemical fertilizers have the same nutrition as a crop grown in a biologically active soil with high percentage of organic matter? Where does hydroponics fit in? or Have modern crop varieties been breed for appearance and not nutrition? or Something else entirely? Thank you for your time. [link] [comments]  |
| How are some plants able to survive without direct sunlight, or little to no sunlight at all? Posted: 14 Apr 2018 08:51 AM PDT |
| Why are 2D hexagonal arrays more stable than square or triangular arrays? Posted: 14 Apr 2018 09:19 AM PDT I was just reading the following passage in this article:
It's the last sentence I want to understand better. Why do the three-way junctions of the hexagonal grid "balance the forces" better? Is there a visual that will help me understand? [link] [comments]  |
| Posted: 14 Apr 2018 08:46 AM PDT |
| At which point was Van der Waals' equation necessary for Onnes' work in liquefying helium? Posted: 14 Apr 2018 01:42 PM PDT I read that he wanted to prove/disprove his friends theory. What did he wanted to prove? It surely wasn't the quantifiable capability of VdW's equation when a gas is in its phase transition below the critical temperature, because carbon dioxide would be way better for that. So what do the people mean, when they are writing, that he wanted to prove his friends theory. And what does he mean, when he is saying, that he was led by VdW's theory? (His nobel prize was awarded in 1913 and I just tried to read his lecture which one can read for free on the nobelprize site) Thank you in advance [link] [comments]  |
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