How do satellites calculate co2 emissions?

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• How do satellites calculate co2 emissions?
• Do taller people have higher than average blood pressure?
• Why does water create suction on flat surfaces?
• Is it always raining somewhere?
• Can the music you fall asleep to change your dreams?
• Does (or how does) the non-spectral color we see as magenta differ from the visible spectrum of colors for animals with more than three cones in their eyes?
• How do the kidneys know how much water to filter out of the blood they process?
• How do humans determine the location of sounds?
• How do scientists measure CMB radiation difference in temperature of 0,001%?
• Are there any species that exibit both parthenogenesis and temperature based sex determination? If not it there a reason it wouldn't work?
• With the Amazon fires what impact will it have on all the different wildlife there?
• If a plant that has seasonal traits (such as winter dormancy) is taken from the Northern Hemisphere to the Southern Hemisphere, will the plant exhibit traits based upon its place of origin, or will it adjust to the weather of the new location?
• Is it possible for planets to have rings in a different orientation as opposed to "along and around the equator". If yes/no, why?
• Has the exoplanet search changed the Drake Equation results?
• Where does the earth’s oxygen actually come from?
• Why is tickling unpleasant? What IS tickling?

How do satellites calculate co2 emissions? Posted: 25 Aug 2019 02:28 AM PDT I've been trying to find a good source of information but so far I haven't been able to find how do these satellites calculate carbon emissions. I see that Europe , USA and China among other have satellites to read carbon emissions and some with errors of no more than 0.5% https://www.theverge.com/2017/10/12/16460014/nasa-oco-2-satellite-carbon-dioxide-earth-atmosphere-plants-ocean-climate-change https://www.governmenteuropa.eu/satellites-monitoring-co2-emissions/93413/ submitted by /u/cvielma [link] [comments]

Do taller people have higher than average blood pressure? Posted: 24 Aug 2019 04:07 PM PDT submitted by /u/iruny [link] [comments]

Why does water create suction on flat surfaces? Posted: 24 Aug 2019 06:06 PM PDT I've noticed that sometimes when a hard objedt is wet on its bottom that it can grip flat surfaces. It takes more effort to remove from the surface and there seems to be a suction-like effect where the water is. Why is this? Is it related to surface tension? submitted by /u/dudebrodadman [link] [comments]

Is it always raining somewhere? Posted: 24 Aug 2019 03:46 PM PDT submitted by /u/PayYourSurgeonWell [link] [comments]

Can the music you fall asleep to change your dreams? Posted: 24 Aug 2019 01:57 PM PDT Mainly regarding binaural beats or hemi sync technology ,can falling asleep to this sounds make you aware in your dreams,or change brain activity during sleep? submitted by /u/CapableLandscape3 [link] [comments]

Does (or how does) the non-spectral color we see as magenta differ from the visible spectrum of colors for animals with more than three cones in their eyes? Posted: 24 Aug 2019 09:02 PM PDT If magenta is not an actual wavelength of light but a mixture of two opposite ends of the spectrum that our brain then interprets, does that work the same even for creatures with 4, 5, or 12 cones that can see more color, or does color vision in general have to perform some sort of "trick" or interpretation of mixed red and blue light since they're at opposite ends of a linear spectrum? I'm having a hard time understanding and separating the physics from the biology, or is this all just speculative because we can't ask a bird what it sees? If that's the case, what about (not fully) color blind people; does the brain/eye still have to do some sort of trick when the highest visible wavelength "reds" (~700nm) mixes with the lowest visible "blues" (400nm) to interpret that color? submitted by /u/HeckelSystem [link] [comments]

How do the kidneys know how much water to filter out of the blood they process? Posted: 24 Aug 2019 11:09 AM PDT submitted by /u/crackerjam [link] [comments]

How do humans determine the location of sounds? Posted: 24 Aug 2019 10:35 AM PDT Is it based solely on differences in amplitude between the ears, or are we able to detect the minor delay as well? submitted by /u/ibelieveinbass [link] [comments]

How do scientists measure CMB radiation difference in temperature of 0,001%? Posted: 24 Aug 2019 01:01 PM PDT submitted by /u/iliketrainzzzz [link] [comments]

Are there any species that exibit both parthenogenesis and temperature based sex determination? If not it there a reason it wouldn't work? Posted: 24 Aug 2019 01:55 PM PDT submitted by /u/Meloncollie10 [link] [comments]

With the Amazon fires what impact will it have on all the different wildlife there? Posted: 24 Aug 2019 08:44 AM PDT Im assuming the Amazon is home to millions of different species and even some native, so are we looking at possible huge decreases in population? Will species be on the brink of endangerment? Is there any sort of way to tell how much life has been lost? The wildlife is honestly my only big personal concern from all of this and i dont really see anyone else talking about it. submitted by /u/BrianGriffin1208 [link] [comments]

If a plant that has seasonal traits (such as winter dormancy) is taken from the Northern Hemisphere to the Southern Hemisphere, will the plant exhibit traits based upon its place of origin, or will it adjust to the weather of the new location? Posted: 24 Aug 2019 12:50 PM PDT submitted by /u/ColonOBrien [link] [comments]

Is it possible for planets to have rings in a different orientation as opposed to "along and around the equator". If yes/no, why? Posted: 24 Aug 2019 04:02 AM PDT I recently found out that the rings are formed by debris rotating around the planet in the same axis as the planet. But i was wondering if it is not possible for them to form in a different orientation. submitted by /u/lukasgray123 [link] [comments]

Has the exoplanet search changed the Drake Equation results? Posted: 24 Aug 2019 07:46 AM PDT With the various methods used in the search for exoplanets, has there been a determination as to a percentage of stars that do and do not harbor planets? Habitable planets? Has this number changed the possible results of the Drake Equation which Dr Carl Sagan promoted? f(p): the fraction of stellar bodies that have planets around them Ne: the average number of habitable planets or moons in any given solar system Or is the sample size too small to make a determination at this time? submitted by /u/Doit2it42 [link] [comments]

Where does the earth’s oxygen actually come from? Posted: 24 Aug 2019 05:13 AM PDT I'm starting this with I believe in climate change but I'm sick and tired of misleading and exaggerated climate change rhetoric. The tipping point for me was the rainforest fires and all the "stats" being thrown around without context. People are saying that 20% of the world's oxygen comes from the rainforest. They also say 80% if the world's oxygen comes from the ocean's phytoplankton... any child with a basic grasp of simple arithmetic could tell you that adds up to 100% and anyone with more than half a brain can tell you that makes no sense. 100% of the planets entire oxygen output does not come from these two places. There's millions of square kilometres of plantlife in Africa, Russia, Canada, the US and other places where oxygen is produced. So my question stands. Where does our oxygen actually come from? submitted by /u/Cilarnen [link] [comments]

Why is tickling unpleasant? What IS tickling? Posted: 24 Aug 2019 01:17 AM PDT If I had to explain the sensation to an alien, I would pretty much come up blank. It's not pain, and it's not so severe that it can't be a joke between people, but it's still something that we automatically shrink away from. So just what is it, and what purpose does the function serve? submitted by /u/Eli_Freysson [link] [comments]

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How does masturbating "reduce the risk of prostate cancer"? Is it just a statistical correlation or is there a causal link?

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• How does masturbating "reduce the risk of prostate cancer"? Is it just a statistical correlation or is there a causal link?
• I added cold water to Everclear (95% Ethanol) and the bottle felt warm, why?
• [physics] what happens to atoms when they are extremely crammed together like in black holes or in neutron stars? Are the orbits of the atoms overlapping each other?
• How can the recently made C₁₈ ring have alternating single and triple bonds? Wouldn't the π orbitals allow every bond to be a double bond as well due to electron delocalization?
• After watching Mindhunters- how scientifically rigorous is the method of profiling?
• Why do substances mix better by first mixing the smaller amount then diluting it, rather than just mixing all of it at once?
• Do ants have any way of telling when they're climbing a tree that they're traveling against gravity and expending more energy?
• Why do microwaves cause sparks in metals but not regular light?
• Why do surgeons often amputate an appendage in the case of an open fracture (break where the skin breaks through) but rarely in the case of a close fracture?
• How do viruses actually cause disease?
• When you tag someone with a laser in a lasertag games, how does the gear knows who tag who ?
• How exactly do stains/ semi permanent dyes, etc, work?
• How does your body regulate bloodflow, for example if your body wants to get a lot of blood to your legs how does it make sure it gets there?
• What indicates a species is going to speciate?
• How does an oasis form in a desert?
• What makes a recyclable plastic eventually unable to be recycled?
• Would’ve Neanderthals been able to build and use boats?
• How effective is topical application of a systemic medication like Androgel, as a drug delivery method? How much of the drug actually gets absorbed into the body, and circulated to where it is needed, before it is washed or worn off?

How does masturbating "reduce the risk of prostate cancer"? Is it just a statistical correlation or is there a causal link? Posted: 24 Aug 2019 05:00 AM PDT My assumption has always been that there is some small correlation, rather than any medical link. It seems like it would be extraordinarily difficult to demonstrate any notable link. Or is it just a meme? submitted by /u/TheScrawl [link] [comments]

I added cold water to Everclear (95% Ethanol) and the bottle felt warm, why? Posted: 24 Aug 2019 01:22 AM PDT About a 50:50 mix or 100ml:100ml. submitted by /u/wh3n [link] [comments]

[physics] what happens to atoms when they are extremely crammed together like in black holes or in neutron stars? Are the orbits of the atoms overlapping each other? Posted: 24 Aug 2019 04:55 AM PDT submitted by /u/WalksOnWine [link] [comments]

How can the recently made C₁₈ ring have alternating single and triple bonds? Wouldn't the π orbitals allow every bond to be a double bond as well due to electron delocalization? Posted: 24 Aug 2019 07:12 AM PDT submitted by /u/Vampyricon [link] [comments]

After watching Mindhunters- how scientifically rigorous is the method of profiling? Posted: 24 Aug 2019 07:05 AM PDT While I love the show, I am wondering about the scientific rigor of profiling. Some thoughts: The nature of interviews with convicted killers often mean that the interviews aren't structured- questions that are asked of one perpetrator may not be the same set of questions asked of another (who have committed similar crimes). The perpetrators may not be entirely truthful. The selection process is also limited in that the agents can only interview killers who are caught and are willing to be conversational. submitted by /u/decantre [link] [comments]

Why do substances mix better by first mixing the smaller amount then diluting it, rather than just mixing all of it at once? Posted: 24 Aug 2019 06:56 AM PDT And also are there situations where this mixing method is not the best one? submitted by /u/trixter21992251 [link] [comments]

Do ants have any way of telling when they're climbing a tree that they're traveling against gravity and expending more energy? Posted: 23 Aug 2019 05:48 PM PDT submitted by /u/EqualOpposingForces [link] [comments]

Why do microwaves cause sparks in metals but not regular light? Posted: 24 Aug 2019 06:04 AM PDT Are the microwaves in a microwave oven simply much more powerful than regular visible light? Would a bright enough light bulb or LED also cause sparking in metals? submitted by /u/man-vs-spider [link] [comments]

Why do surgeons often amputate an appendage in the case of an open fracture (break where the skin breaks through) but rarely in the case of a close fracture? Posted: 23 Aug 2019 03:56 PM PDT submitted by /u/Medium_Bonus [link] [comments]

How do viruses actually cause disease? Posted: 23 Aug 2019 06:38 PM PDT I understand that viruses infect host cells, and stimulate the production of more virus particles, but how does the presence of these small microbes actually cause sickness? submitted by /u/erjhgbnerbg [link] [comments]

When you tag someone with a laser in a lasertag games, how does the gear knows who tag who ? Posted: 23 Aug 2019 01:23 PM PDT I don't understand quite well how you can manipulate a laser to transmit informations such as a username by shooting another player, knowing that there's not a lot of parameters you can manipulate in a laser (amplitude, wavelength, etc) and that the lasergun is pretty cheap submitted by /u/rouzalie [link] [comments]

How exactly do stains/ semi permanent dyes, etc, work? Posted: 23 Aug 2019 06:29 PM PDT Please correct me if this is the wrong sub or it's been asked before. I've been using semi permanent dyes for years and recently got into henna. Both products say the longer you leave it on, the longer it stays/ the better the color, etc. But I've never been able to find anything saying when you've left it on past it's point of actually doing anything. Permanent hair dye stops doing anything after about 60 minutes, as far as my googling has told me. Is there a similar cut off for stains/ stain like dyes? submitted by /u/JamesBuchananBarnes [link] [comments]

How does your body regulate bloodflow, for example if your body wants to get a lot of blood to your legs how does it make sure it gets there? Posted: 23 Aug 2019 02:35 PM PDT submitted by /u/MelskiWelski [link] [comments]

What indicates a species is going to speciate? Posted: 23 Aug 2019 01:45 PM PDT submitted by /u/powerscunner [link] [comments]

How does an oasis form in a desert? Posted: 23 Aug 2019 12:37 PM PDT submitted by /u/namejeff24 [link] [comments]

What makes a recyclable plastic eventually unable to be recycled? Posted: 23 Aug 2019 01:05 PM PDT I heard there's a limit to how many times a recyclable plastic can be recycled before it simply can't be done anymore. What is the state of the plastic right before the end of its lifecycle? What's the plastic like when it's no longer able to be recycled? submitted by /u/BlueSky1877 [link] [comments]

Would’ve Neanderthals been able to build and use boats? Posted: 23 Aug 2019 04:47 PM PDT submitted by /u/practicalnut [link] [comments]

How effective is topical application of a systemic medication like Androgel, as a drug delivery method? How much of the drug actually gets absorbed into the body, and circulated to where it is needed, before it is washed or worn off? Posted: 23 Aug 2019 10:33 AM PDT Dimethyl sulfoxide is known for dissolving right into the skin, and can even carry other compounds in with it. But it is a small solvent molecule, so it is easy to see that it would be mobile. But Testosterone is a 21 heavy atom crystalline solid. So it's hard to imagine it getting any deeper than the top layer of dry, dead skin, let alone reaching the circulatory system, unless something like a patch is used to maintain contact over an extended period of time. Is there some mechanism for transporting material down through the skin layers? Or does almost all of a topical application like Androgel just get wasted, because it is worn off or washed off before it can be absorbed? submitted by /u/ECatPlay [link] [comments]

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For species with very long life spans (everything from Johnathan, the 187-year-old tortoise, or Pando, the 80,000-year-old clonal tree system), are there observable evolutionary differences between old, still-living individuals and "newborn" individuals?

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• For species with very long life spans (everything from Johnathan, the 187-year-old tortoise, or Pando, the 80,000-year-old clonal tree system), are there observable evolutionary differences between old, still-living individuals and "newborn" individuals?
• In the movie Gravity when Sandra Bullock is spinning out of control, would simply closing her eyes stop the spinning sensation?
• Is there a significant difference between the current Amazon forest fire and previous seasons?
• How are molecular structures determined with such precision? How were they determined in the past?
• What is the difference between plasma and ionized gas?
• Do ducks have the ability to count?
• How an Aerospike engine really works ?
• Could it be posible to capture the rotation of another galaxy on video?
• How does rotation speed affect a planet's gravity?
• If you were standing on the moon, would the sun rise in the east and set in the west?
• What do thing like Acetaminophen and NSAID's actually do?
• What happens when you send too much light to an avalanche photodiode (APD)?
• Why does eye dilation occur in regards to excitement, feeling good, and psychedelic substances?
• Can hybridity be determined before crossing plants?
• What conditions on Earth have helped in harboring Oxygen compared to other planets?
• This may very well be a stupid question but how comes that when you put an ice cube in a glass of water, the level of water doesn't raise when it melts, yet the level of the oceans raises because of the melting of the icebergs?
• How does sub-lingual medication get into the bloodstream?

For species with very long life spans (everything from Johnathan, the 187-year-old tortoise, or Pando, the 80,000-year-old clonal tree system), are there observable evolutionary differences between old, still-living individuals and "newborn" individuals? Posted: 23 Aug 2019 06:06 AM PDT submitted by /u/_Robbie [link] [comments]

In the movie Gravity when Sandra Bullock is spinning out of control, would simply closing her eyes stop the spinning sensation? Posted: 23 Aug 2019 12:24 AM PDT submitted by /u/JAG1117 [link] [comments]

Is there a significant difference between the current Amazon forest fire and previous seasons? Posted: 22 Aug 2019 08:49 AM PDT submitted by /u/squidster42 [link] [comments]

How are molecular structures determined with such precision? How were they determined in the past? Posted: 22 Aug 2019 10:31 PM PDT My question was inspired by learning that lutein and zeaxanthin are nearly identical molecules (C40H56O2), with the only difference between the two being that a single double bond is found in neighboring positions along a hexagon at one end of the molecule. These molecules are rather large. How are molecular structures determined so exactly? When did chemists acquire this capability? And what were the major milestones in our ability to determine molecular structure? I don't just mean how many of each kind of element and where they are, but also things as subtle as the position of a single double bond. A lot of molecules are smaller than a wavelength of visible light, so it's not as if we could just look at them under a microscope, yet we know their structures exactly. So how do chemists figure these things out? submitted by /u/Berkamin [link] [comments]

What is the difference between plasma and ionized gas? Posted: 22 Aug 2019 11:52 PM PDT submitted by /u/_Shaquille_Oatmeal_ [link] [comments]

Do ducks have the ability to count? Posted: 22 Aug 2019 02:34 PM PDT Some species of duck can have many ducklings at once. If a mother duck has 12 babies and one has gone missing and is out of earshot, does the mother know it? Will the mother duck "count" her ducklings and be able to tell one is missing? Can the mom recognize the ducklings as individuals and notice that "Susie" has wondered off again? Or are mother ducks blissfully unaware as long as their herd of ducklings is about the right size and that's why baby ducks have such a strong instinct to stick with mom? submitted by /u/itsnotamountainlion [link] [comments]

How an Aerospike engine really works ? Posted: 23 Aug 2019 01:47 AM PDT Hi all, I'm interested in all things rocket, and I found the Aerospike engine very interesting (and super cool looking) However, I can't understand what makes it work correctly compared to a normal bell engine : -The bell shape is here to redirect the flow (that have a random distribution) so that its coming out on the right direction -> OK -when the air is not dense enough relative to what the bell have been designed, the flow coming outside of the bell expands more to reach pressure equilibrium, thus loose thrust at higher altitudes ->OK -On an aerospike engine, I quote Wikipedia : "The spike forms one side of a "virtual" bell, with the other side being formed by the outside air—thus the "aerospike". -> this, I don't understand, why, in that case, the thrust isn't expending on the side like a normal random flow firing in all direction ? the exhaust pressure is still much higher than air….. one side of the exhaust is on the spike make a "half" bell, right, the other, exposed to air, should just go in all directions, like it happens on bell engines ? If somebody could help me understand the difference, I will appreciate 😊 (i'm not sure if its more Physics or Engineering....) submitted by /u/Kypsys [link] [comments]

Could it be posible to capture the rotation of another galaxy on video? Posted: 22 Aug 2019 09:46 PM PDT It is said that everything spins in the Universe – from galaxies to stars to planets. ... This spinning of galaxies continues even after their formation. Our Milky Way galaxy is one of these spinning structures and its entire disc of stars, gas and dust is rotating at around 168 miles per second. submitted by /u/turbojethellion [link] [comments]

How does rotation speed affect a planet's gravity? Posted: 22 Aug 2019 10:06 PM PDT Could a planet the size of pluto or Jupiter have the same gravitational pull as earth if it spans fast or slow enough? submitted by /u/JoeMourningSun [link] [comments]

If you were standing on the moon, would the sun rise in the east and set in the west? Posted: 22 Aug 2019 05:45 PM PDT What path does the sun take across the sky from the perspective of the moon's surface? How about the Earth? submitted by /u/loughton220 [link] [comments]

What do thing like Acetaminophen and NSAID's actually do? Posted: 22 Aug 2019 04:49 PM PDT My question is fairly simple: I am curious if they just relieve the pain and get rid of it, or do they simply mask the pain? What makes them different from painkillers in their effect? Do they simply block some receptors? submitted by /u/Vercetor [link] [comments]

What happens when you send too much light to an avalanche photodiode (APD)? Posted: 22 Aug 2019 01:48 PM PDT I can't seem to find anything online about how an APD's behavior will change if you continuously send it too much light. Does this cause a breakdown on the electronic structure and increase the dark counts over time? Or does it return to normal operation once you remove the light source and let it settle? submitted by /u/MyAltSPDCAcc [link] [comments]

Why does eye dilation occur in regards to excitement, feeling good, and psychedelic substances? Posted: 22 Aug 2019 08:47 AM PDT I understand eye dilation in regards to lighting and how the act of dilation occurs to regulate the amount of light that enters the eye, but what function does eye dilation serve in regards to moments when you get excited, or when you are with someone you love? I've noticed that almost all kids have huge pupils. How and why do you think this occurs? submitted by /u/deadpetdaddy [link] [comments]

Can hybridity be determined before crossing plants? Posted: 22 Aug 2019 03:25 PM PDT If I take two varieties of plant, say pumpkins, and bred them together, how and at what point can I be sure if it is a hybrid or just a stable cross? submitted by /u/Sgt_Spatula [link] [comments]

What conditions on Earth have helped in harboring Oxygen compared to other planets? Posted: 22 Aug 2019 01:22 PM PDT submitted by /u/Imma_not_a_bot [link] [comments]

This may very well be a stupid question but how comes that when you put an ice cube in a glass of water, the level of water doesn't raise when it melts, yet the level of the oceans raises because of the melting of the icebergs? Posted: 22 Aug 2019 06:42 AM PDT submitted by /u/Amphalia [link] [comments]

How does sub-lingual medication get into the bloodstream? Posted: 22 Aug 2019 12:57 PM PDT How does sub-lingual medication get into the bloodstream? submitted by /u/sandy154_4 [link] [comments]

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