Why isn't the human body comfortable at 98.6 degrees if that's our internal temperature? |
- Why isn't the human body comfortable at 98.6 degrees if that's our internal temperature?
- Why is a moving point charge also producing a magnetic field in a vacuum?
- Is it possible to optically observe individual atoms?
- In natural history, we often learn about ancient fauna, but what does ancient flora look like? When did Trees evolve? and what major evolution's in plants happened and when?
- What type of radiation is produced by the annihilation of interacting matter and antimatter particles?
- Do a Rhino's eyes ignore its horn the same way a person's eyes will ignore the nose because it's always there?
- Can you explain how forces such as the strong nuclear force to gravity is mediated through particles?
- When we hear about small populations of animals making a comeback or growing wildly in a new habitat, isn't there a huge problem with their limited genetics, similar to the problem of mutations in offspring from incest?
- If I'm near-sighted, why can't I hold a mirror in front of my face to look at something in the distance behind me and see it clearly?
- [Biology] What is it about the peanut that makes them so cheap to grow and sell?
- Why do direct dopamine agonists like apomorphine or bromocriptine not have the abuse potential of indirect agonists like cocaine or amphetamine?
- What causes the release of dopamine and other "feel good" chemicals after exposure to drugs like opiods?
- What happens in the brain that makes someone black out from blunt force trauma to the head?
- Are there diseases that can pass from Yaks to humans?
- Why does wood change colour when it burns?
- Why does some mammals' fur turn grey in their old age and not others?
- Is there "wider" and "narrower" focus of conscious attention? Is one necessarily better? Is it state- or trait-specific? What can change the scope of focus?
- Why does milk help with hot peppers but water does not?
- Can sperm/eggs be harvested from a recently deceased animal? If so, how long would the genetic material remain viable?
- When you hear metal cooling down, what's actually going on?
- Why do batteries explode?
- Parasymp nerves stimulate excitatory neurons in the ENS causing contractions of smooth muscle in the GI my txtbook says. If that is true, why does the vagovagal reflex cause relaxation by doing the complete opposite. Isn't that contradictory?
| Why isn't the human body comfortable at 98.6 degrees if that's our internal temperature? Posted: 08 Jul 2017 08:05 AM PDT It's been hot as hell lately and got up to 100 yesterday. I started to wonder why I was sweating and feeling like I'm dying when my body is 98.6 degrees on the inside all the time? Why isn't a 98 degree temp super comfortable? I would think the body would equalize and your body wouldn't have to expend energy to heat itself or cool itself. And is there a temperature in which the body is equalized? I.e. Where you don't have to expend energy to heat or cool. An ideal temperature. Edit: thanks for all the replies and wealth of knowledge. After reading a few I remembered most of high school biology and had a big duh moment. Thanks Reddit! Edit: front page! Cool! Thanks again! [link] [comments]  |
| Why is a moving point charge also producing a magnetic field in a vacuum? Posted: 09 Jul 2017 02:30 AM PDT Hello /r/askscience I had a really long night trying to understand any explaination, but I couldn't jump to any conclusion. A common explaination to why an e.g. electron has a magnetic field when moving is the experiment with a wire with protons and electrons and an electron outside the wire. Because of special relativity, the Coulomb's law experienced from the electrons point of view (the wire is moving, density of protons increases from their point of view), it must translate to a magnetic field from our point of view. What I don't understand is: How can you explain it in a case that I've drawn here: http://i.imgur.com/D3d7r64.jpg The moving electron with a constant velocity is in a vacuum (PART A), there is no other charge or anything, so relative to the current point of view, with what is it interacting to produce a magnetic field? Or is there no magnetic field of the electron in Part A? If so, why does it have one in Part B? //EDIT: To clarify, my question is why there is a magnetic field produced by the electron around itself. The big square (magnetic field) in the image is just to show that the electron must have one because it is deflected. I hope that most of my question is correct. Thanks in advance! [link] [comments]  |
| Is it possible to optically observe individual atoms? Posted: 09 Jul 2017 01:02 AM PDT I know atoms can be detected through electron microscopes (most people have seen images of structures made of carbon atoms, for example), but I've never really thought about how one would optically view one. Obviously, in practice, it would be impossible to manufacture a lens anywhere near that powerful / perfect, but in a theoretical sense, could one actually see an atom? [link] [comments]  |
| Posted: 08 Jul 2017 06:53 PM PDT |
| Posted: 08 Jul 2017 11:27 AM PDT It is said that when an particle of matter and antimatter interact they annihilate releasing all of their energy. What is the frequency of the radiation energy that results? What determines this? [link] [comments]  |
| Posted: 08 Jul 2017 02:04 PM PDT |
| Posted: 09 Jul 2017 02:15 AM PDT E.g. gluons mediating the strong force between quarks. Gravitons (I know they have not been detected yet) etc. EDIT: 'ARE mediated through particles' :( [link] [comments]  |
| Posted: 08 Jul 2017 03:44 PM PDT For example, a recent post "TIL that 24 rabbits introduced to Australia in 1859 led to a population of 10 BILLION by 1920". Or populations that are severely endangered that make a comeback. [link] [comments]  |
| Posted: 08 Jul 2017 05:12 PM PDT |
| [Biology] What is it about the peanut that makes them so cheap to grow and sell? Posted: 08 Jul 2017 02:10 PM PDT I know this is also an economics question, but peanuts seem to have a historical "cheapness" about them, and I wonder if there are biological reasons as to how well they grow in various climates, yield, or soil nutrient uptake that's behind it. [link] [comments]  |
| Posted: 08 Jul 2017 04:57 PM PDT I've always thought the reason drugs like amphetamine and cocaine were addictive was not necessarily because of their stimulating effects but rather the intense euphoria they induce due to their dopaminergic properties. But when reviewing the effects of apomorphine and bromocriptine, there is no mention of euphoria being reported. Additionally, the drugs neither have documentation on abuse potential, nor are they scheduled as controlled substances. Does this suggest that there's more to a drug's addictiveness than its dopaminergic properties? [link] [comments]  |
| Posted: 08 Jul 2017 07:00 PM PDT Is this just an evolutionary accident or did it serve a purpose earlier in our history? I understand that some foods that taste good may have rare chemicals that would make them desirable for our predecessors to have in their diets, but why does this same reaction happen with drugs? [link] [comments]  |
| What happens in the brain that makes someone black out from blunt force trauma to the head? Posted: 08 Jul 2017 12:22 PM PDT Sorry if this has a very simple answer but I'm genuinely curious about the specifics. [link] [comments]  |
| Are there diseases that can pass from Yaks to humans? Posted: 08 Jul 2017 12:09 PM PDT My wife and I went to a touring/petting zoo with some kinda unusual animals, including some Yaks. One of the Yaks sneezed on her and at the time it was pretty gross and kinda funny. While I am not concerned for her, it just got me wondering if there is any type of disease can be pasted from Yaks, becuase if so, I wonder how parks like that can stay in business. [link] [comments]  |
| Why does wood change colour when it burns? Posted: 08 Jul 2017 03:31 PM PDT |
| Why does some mammals' fur turn grey in their old age and not others? Posted: 08 Jul 2017 05:31 PM PDT |
| Posted: 08 Jul 2017 01:43 PM PDT |
| Why does milk help with hot peppers but water does not? Posted: 08 Jul 2017 01:28 PM PDT |
| Posted: 08 Jul 2017 05:11 PM PDT Today there was another thylacine 'sighting' in South Australia and during the coverage one of the scientists said we really needed to find a body to confirm their existence. This got me thinking, assuming they found a body, presumably they would preserve it (freeze?) ASAP in order to study it further. Could the sperm or eggs of such an animal be viable for breeding? If a male and a female were both found recently deceased, could we not bring back the species? Has this been tried before on other extinct and near extinct species? Cheers! (edit - formatting) [link] [comments]  |
| When you hear metal cooling down, what's actually going on? Posted: 08 Jul 2017 09:45 AM PDT After you drive a car for a while and turn the engine off, you hear a "tink tink" sound as the metal is cooling down. I imagine it's sort of a micro version of the sound those snap bracelets make - going from concave to convex, but on a tiny scale. But what's actually going on? [link] [comments]  |
| Posted: 08 Jul 2017 07:31 PM PDT |
| Posted: 08 Jul 2017 12:43 PM PDT |
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