How close does an electron and a positron need to approach to be able to annihilate? |
- How close does an electron and a positron need to approach to be able to annihilate?
- At what point is a lake big enough to be classified as a sea?
- Do Black Holes Destroy Energy?
- Is there a maximum speed the water can reach while swirling as it going down a drain if affected only by gravity, its own mass and volume?
- Why does the measles rash typically start on the face?
- In Euclidian geometry the shortest distance between two points is a straight line. Can that be proved?
- How are radio waves still understandable by devices after being reflected off of surfaces? Is the signal not affected by being 'inverted'?
- Are oxygen levels in the air less at night than in the day?
- Does every planet have a ring "zone" like Saturn?
- How many holes in pants? (Not really math, but not really any one thing, so...)
- How were Newton's 3 laws of motion first proven to be true?
- Are there any governing equations which determine the size of the habitual zones around a binary system if all information is know about the stars ie mass radii, separation, Effective temperature etc?
- Why are "x" and "y" the two primary variables in most of algebra?
- What happens when a cell spends too much time in interphase?
- If atoms are electrically neutral, then why do they form bonds? How can electrically neutral atoms have different electronegativities?
- What properties do ferrous materials have that other metals don't, allowing for the formation of magnets?
- Is the human sleep cycle flexible or locked to the day/night cycle of the earth?
- How are human haplogroups different from speciation?
| How close does an electron and a positron need to approach to be able to annihilate? Posted: 28 Mar 2019 04:34 AM PDT |
| At what point is a lake big enough to be classified as a sea? Posted: 27 Mar 2019 05:35 PM PDT |
| Do Black Holes Destroy Energy? Posted: 28 Mar 2019 01:31 AM PDT I am a student at school, and we are learning about types of energy's. Going off what my teacher has said, (Something like the Law of The Conservation of Energy) according to that, energy cannot be destroyed only transferred or transformed. Since light has no mass what happens to the light when it enters a black hole? What happens to the light energy when it enters the black hole? I assume it wouldn't transfer the energy since the black hole can't absorb it's mass to get bigger... so where does it go? Does it get destroyed? (Some information or reasoning for thinking this in the question might be wrong so please correct me if it is). [link] [comments]  |
| Posted: 28 Mar 2019 03:44 AM PDT |
| Why does the measles rash typically start on the face? Posted: 27 Mar 2019 04:15 PM PDT |
| Posted: 27 Mar 2019 11:55 AM PDT Or, is my layperson understanding correct? There are a number of underlying assumptions of Euclidian Geometry—including this one—that appear self evident but actually can't be proved. [link] [comments]  |
| Posted: 27 Mar 2019 03:38 PM PDT |
| Are oxygen levels in the air less at night than in the day? Posted: 27 Mar 2019 03:36 PM PDT Got into an argument with my dad regarding this very topic. It started when by brother said that he wanted to go jogging at night but my dad refused saying that the oxygen levels at night are low and won't be good for him. Keep in mind that we're talking about a suburban area with a relatively large amount of vegetation at roughly 11 pm. [link] [comments]  |
| Does every planet have a ring "zone" like Saturn? Posted: 27 Mar 2019 01:20 PM PDT Listened to a talk given by an astronomer who specialized in planet formation talking about Cassini/Saturn's rings. He mentioned how the rings are in an area where gravitational tidal forces prevent long term satellite formation. Does every planet/star have a region like that, or is Saturn special; if so, do we know why? [link] [comments]  |
| How many holes in pants? (Not really math, but not really any one thing, so...) Posted: 27 Mar 2019 03:44 PM PDT So, I've had this question that's been nagging me. Do pants have 1, 2, or 3 holes? They have 3 openings, but they all link to each other. And from one position it looks like 2 holes coming together to make one, but from another, it looks like one hole that splits off into two. In a way, it can also be seen as one continuous hole which covers both legs. Help. [link] [comments]  |
| How were Newton's 3 laws of motion first proven to be true? Posted: 27 Mar 2019 01:56 PM PDT While I was taught to accept these principles as true (and have little doubt in their validity), I am curious as to how we were first able to scientifically prove them to be true. I ask this because in Newton's first laws of motion, couldn't one be skeptical as to the statement if we did not have a full understanding of gravity? [link] [comments]  |
| Posted: 27 Mar 2019 05:15 PM PDT |
| Why are "x" and "y" the two primary variables in most of algebra? Posted: 27 Mar 2019 05:13 PM PDT On a 2d graph, the axes are always labeled either x or y, as well as many problems being "solve for x" or a basic linear equation of y=x, yet unless you substitute y for f(x), why dont people use "a" and "b" or even "y" and "z"? Who came up with "x" and "y"? [link] [comments]  |
| What happens when a cell spends too much time in interphase? Posted: 27 Mar 2019 04:46 PM PDT |
| Posted: 27 Mar 2019 08:16 PM PDT For example, oxygen has an atomic number of 8, which means it has 8 protons and 8 electrons. Thus, it is electrically neutral (correct?). However, it wants to form bonds with say hydrogen, why would they want to fill their valences if they are neutral? Hydrogen is +1, oxygen is -2, so two hydrogen to an oxygen, but how can they be negative (or positive) if they are electrically neutral? I've googled this, but I can't quite find the answer I'm looking for. Perhaps some of my underlying assumtions are incorrect. Thanks! [link] [comments]  |
| Posted: 27 Mar 2019 10:03 AM PDT |
| Is the human sleep cycle flexible or locked to the day/night cycle of the earth? Posted: 27 Mar 2019 09:56 AM PDT The part of the brain that controls sleep is in the hypothalamus, the rather primordial survival part of the brain. That fundamental part was formed simultaneously throughout evolution with the 24 hour day/night cycle the earth has influencing it's sleep cycle. Is a different day/night cycle something that humans can adapt to short term or long term? Or is the 24hour day night cycle baked into our brains and any deviation will have negative effects that cannot be adapted to? If yes, how elastic a deviation we can have without negative effects? [link] [comments]  |
| How are human haplogroups different from speciation? Posted: 27 Mar 2019 11:38 AM PDT I don't want this to come across as racist. I know race relating to skin color is an arbitrary, dated, and ignorant concept. This is a serious question. Why aren't the differences in human haplogroups isn't considered speciation? Also I am aware that species are a sort of dubious concept to begin with, I am using it in the basic sense of similar but different animals like lions and tigers. But humans being more similar like with dog breeds. I know dog haplogroups exist but not much more than that. Also, I am asking if "the races" are different species now. I want to know if the variation in haplogroup types are the begins of new species. [link] [comments]  |
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