How can our brain recognize that the same note in different octaves is the same note? |
- How can our brain recognize that the same note in different octaves is the same note?
- What evidence is there that the syndromes currently known as high and low functioning autism have a shared etiology? For that matter, how do we know that they individually represent a single etiology?
- If black absorbs all wavelengths of visible light, then how can we perceive lights of different colours shining on a black object? Aren't these rays reflecting back to our eyes, implying that the light is not absorbed?
- Do we know what the population density of dinosaurs were?
- Why do "mineral sunscreens" (titanium oxide, zinc oxide) become transparent when they are "rubbed in" to the skin?
- How can biologists (or entemologists) definitively tell whether an insect like an ant is dead or not?
- How is a virus like chicken pox able to remain dormant in your body and manifest itself again later in life as Shingles (sometimes even decades later)?
- Have any rigorous studies shown probiotics that can actually improve gut health?
- How does an epidemiologist (or other researcher) determine if a newly experienced disease or condition is a genetic disease or otherwise?
- Do fish make friends with eachother? Do they make friends with fish that aren't the same type of fish as themselves?
- I'm tone deaf and cannot recognize different notes or any aspects of music aside from melody and rhythm, are there identified distinctions between the brains of musically gifted people and people who are not?
- Would the mass of a galaxy be considered orbiting its central black hole?
- Does altitude or air pressure affect the frequency of sound?
- why does a bigger brain not equal more intelligence?
- What causes spiral galaxies to be spiral, not evenly distributed like a globe?
- How surfactants act as both emulsifiers ans deemulsifiers?
- Can multiple planets exist in the same orbital path?
- How much does an ant colony remember about locations of food?
- Why does silicone rubber stick to skin?
- What caused the earth’s rotation and what dictated the rate at which it spins? Have we lost any speed over the billions of years?
- Is there any evidence that prehistoric man suffered from acne?
- Does sunlight and rain affect the nitrate content of soil?
- Some drugs, vaccines, etc, can be administered with a simple shot in the arm. Others require an IV. What's the difference?
- Could a sniffer dog tell if two people were related?
- How can we explain the tilt of Sagittarius A*'s axis of rotation relative to the galactic plane?
| How can our brain recognize that the same note in different octaves is the same note? Posted: 17 May 2022 07:48 AM PDT I don't know a lot about how sound works neither about how hearing works, so I hope this is not a dumb question. [link] [comments] |
| Posted: 16 May 2022 06:41 PM PDT |
| Posted: 17 May 2022 04:38 AM PDT |
| Do we know what the population density of dinosaurs were? Posted: 17 May 2022 12:55 PM PDT If I hopped in a time machine and flew around 80 million years ago, would there be dinosaurs all over the place or would they have been sparse? How would we know this? [link] [comments] |
| Posted: 17 May 2022 02:45 PM PDT |
| Posted: 17 May 2022 01:22 PM PDT Some insects can just lie dormant for days, and don't visibly look alive. Are there things like EKG's for insects? Or are other signs used to determine this? Just for background, I have absolutely no background in advanced biology or entemology, but I looked up for answers online and didn't find any. Apologies if this is a stupid question! [link] [comments] |
| Posted: 16 May 2022 02:38 AM PDT I apologise if my understanding is incorrect, but I've watched a few videos on the Immune system and the really basic takeaway I got on how it works is something like: Virus detected > Immune system battles virus > Recovery From my understanding there is also something involving Memory cells and Helper T cells to help protect you against the same virus/bacteria once you've recovered. So why then is something like Chicken pox simply able to recede into our nerves and not be bothered by our Immune system instead of being fully eradicated in the first place? [link] [comments] |
| Have any rigorous studies shown probiotics that can actually improve gut health? Posted: 16 May 2022 08:55 AM PDT |
| Posted: 17 May 2022 03:21 PM PDT Is it simply process of elimination? (i.e. it's not viral or bacterial, etc.) If there is a record of a particular disease or condition existing within a family or a sub-population of people then, if I understand correctly, linkage analysis can be used to try and locate what specific genetic markers could be related to the traits of the disease. But let us say that a brand new disease is experienced within a patient. What would an example, if simplified that is fine, set of steps that would lead an epidemiologist to conclude that the disease is genetic? [link] [comments] |
| Posted: 17 May 2022 01:33 PM PDT Like, especially in a school of fish such as neon tetras, for a simple example. Do they have certain members of the school that they like or dislike, do they make friends and enemies? [link] [comments] |
| Posted: 17 May 2022 09:01 AM PDT |
| Would the mass of a galaxy be considered orbiting its central black hole? Posted: 17 May 2022 01:35 PM PDT This is more of a question of definition. I understand that unlike orbits in a star system, even something as massive as a black hole is nothing compared to the mass of the galaxy and that a galaxy is considered orbiting itself or the center of mass. I want to know if orbit would even be the right term for the relationship between the black hole and the galaxy. Obviously you can consider close by stars to be in its orbit and of course the reach of gravity is infinite and there would be some effect on the galaxy as a whole, but would just being an object which is at the center of the galaxy make the galaxy in orbit around it? If the black hole is simply within the center of orbital path of the stars in the galaxy, can we say the galaxy is orbiting it? [link] [comments] |
| Does altitude or air pressure affect the frequency of sound? Posted: 17 May 2022 01:31 PM PDT I ask this because I have perfect pitch and lived most of my life in a city that's about 5,300' in altitude. After moving to a city that's lower (4,500'), I noticed that everything started sounding about a quarter note higher (a C, for example, started sounding like a slightly sharp C or a slightly flat C#). I thought I was just losing my sense of perfect pitch (I do have some permanent hearing loss), but occasionally when I travel, things sound a little more like they used to. So I guess that's my question. Does altitude or air pressure affect the frequency of sounds? Or would this more likely be due to hearing loss? [link] [comments] |
| why does a bigger brain not equal more intelligence? Posted: 16 May 2022 10:38 AM PDT I understand that the size of a cell is almost constant regardless of what animal it makes up. A whale brain for instance weighs more than a human brain hence it must have more neurons, if it can make more neural connections, why isn't it smarter, I would expect intelligence to be somewhat proportional to the number of neurons. If this is not the case, why would evolution not just have made a wale have a human like brain? to the whale, the energy required to run a human brain would be insignificant [link] [comments] |
| What causes spiral galaxies to be spiral, not evenly distributed like a globe? Posted: 17 May 2022 10:35 AM PDT What causes the stars to orbit a bit like a sunny side up egg and not spherical? [link] [comments] |
| How surfactants act as both emulsifiers ans deemulsifiers? Posted: 17 May 2022 09:30 AM PDT I read surfactants reduce surface tension and disperse oil in water. But I also read that it acts as a demulsifier. How do they do two seemingly opposite activities? Thank you [link] [comments] |
| Can multiple planets exist in the same orbital path? Posted: 16 May 2022 02:36 PM PDT My understanding of planetary formation is that a disc of material eventually coalesces in a singular object, but is it possible that it happens in one or more locations in the same orbit? Could there be two planets on opposite sides of a star orbiting in sync? Could earth have a twin behind the star that we never see? [link] [comments] |
| How much does an ant colony remember about locations of food? Posted: 16 May 2022 10:55 PM PDT Specifically, if some of the food an ant colony finds is toxic, will they avoid that area in the future? There's an ant colony under my house and while I don't necessarily want to wipe them out (ants are still preferable to termites), I don't really want them in the house, either. If I put a small amount of ant insecticide in the areas of the house they tend to show up in, could I be able to 'train' them to stay outside without wiping out the whole colony? [link] [comments] |
| Why does silicone rubber stick to skin? Posted: 17 May 2022 02:31 AM PDT Silicone rubber gathers dust easily and sticks (weakly) to skin and other materials. What makes silicone so naturally sticky? Does it have to do with electrostatics? [link] [comments] |
| Posted: 16 May 2022 10:30 AM PDT My son asked my a perplexing question regarding earth and why it actually spins. I didn't have a 100% grasp on the subject so I gave him the "I dunno buddy," answer. I'm familiar with the Big Bang, but were all planets, suns, stars created at this one event? Did the order of chaos (planets collided/were destroyed and what we see is the aftermath) create our solar system to revolve around the sun in the same direction? Did the same Big Bang that made these enormous rocks also cause them to spin while being yanked into ellipses around a large grav source? [link] [comments] |
| Is there any evidence that prehistoric man suffered from acne? Posted: 15 May 2022 07:37 AM PDT Fighting with my teenage daughter to wash her face. Her defense included her reasoning that prehistoric man didn't have face wash, since no cave drawings depict acne, so she doesn't need to wash her face. I know, I know. Ridiculous. I've already countered with the fact that they didn't have pollution in the air, their food didn't have chemical additives, etc. But was hoping that this community could back me up on the caveman acne front. Edit: thanks guys for all the wonderful input! I really appreciate the responses from so many different perspectives. Just wanted to clarify that she doesn't currently have acne, other than the occasional pimple or zit; and she does have good body hygiene. Her argument is that she doesn't want to remove all of her natural oils with any harsh (or even gentle) cleansers; she's very much into natural products. Since she is now a little wearing makeup, I think it's important that her face be cleaned every day. [link] [comments] |
| Does sunlight and rain affect the nitrate content of soil? Posted: 16 May 2022 10:58 PM PDT I've recently read about this Indian metalcraft called bidriware. https://en.wikipedia.org/wiki/Bidriware It's these white brass metalware objects with blackened surfaces. The metal is 1 part copper and 16 parts zinc. The center of production of bidriware in India is the city of Bidar. White brass has a pale gray appearance. Bidriware craftsmen blacken their ware using soil they obtain from a 15th century fort in Bidar. They say that in certain parts of the fort, the soil receives no sunlight or rain and thus acquires "special properties" that cause it to blacken the bidriware. From some scientific papers I read, the soil in question is rich in potassium nitrate. When applied to the bidriware object, the potassium nitrate oxides the copper, which creates the black patina. Does sunlight and rain break reduce the nitrate content of soil? The craftsmen say its the soil that doesn't get sunlight or rain that has the properties they desire. [link] [comments] |
| Posted: 16 May 2022 06:58 AM PDT |
| Could a sniffer dog tell if two people were related? Posted: 16 May 2022 10:31 AM PDT Even if they grew up in different environments or didn't even know they were related? [link] [comments] |
| How can we explain the tilt of Sagittarius A*'s axis of rotation relative to the galactic plane? Posted: 16 May 2022 01:08 PM PDT The axis of rotation of the black hole in the middle of the Milky Way appears to be roughly pointing at Earth, which means it points parallel to the galactic plane. Naively, one would expect that like the Sun's axis of rotation is perpendicular to the ecliptic plane, the black hole's axis of rotation would be perpendicular to the galactic plane. I know we typically ascribe some planets having weird axes of rotation (e.g., Uranus' "sideways" rotation or Venus' retrograde rotation) to big collisions with other objects, but this is a totally different scale. Is the tilt of Sagittarius A*'s axis of rotation explainable in terms of a collision (say, a galactic merger) or is there some other way to explain it? [link] [comments] |
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