How much erosion does the international space station experience as it moves through the upper atmosphere?

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• How much erosion does the international space station experience as it moves through the upper atmosphere?
• How does water resistant sunscreen work?
• Can you enlarge the radar cross section of a aircraft?
• Many animals (rats, possums, bats, etc.) carry diseases harmful to humans. Do humans carry any diseases harmful to animals?
• Is the periodic table of elements valid in everywhere in this universe?
• What's actually inside of a piece of amber that appears to have a plant or animal preserved? Is it just an empty cavity in the shape of the animal?
• There are viruses that kill bacteria, bacteriophages. Are there any examples of the reverse, bacteria that kill or limit the spread of viruses?
• Do new social insects learn from their peers or is their complex behavior mostly or entirely genetic?
• What causes a sore throat when you get a cold?
• Does coughing into your arm spread less germs?
• Why did the plague just disappear, it isn't like they had vaccines to eliminate it so where is it!?
• Where does pee from your kidneys go when your bladder is completely full and hasn't been relieved?
• Would stomach acid breakdown sand?
• Why is the seam of a treadmill belt always on a diagonal?
• Can a non metal form an amphoteric oxide ?
• Does the sun have wind? Ive been curious if it was possible?
• Where does candle wax go? What does it produce?
• What color would Nitrous Oxide be in a solidified form?
• How much radiation is an astronaut exposed to on the moon?

How much erosion does the international space station experience as it moves through the upper atmosphere? Posted: 08 Feb 2020 03:26 PM PST submitted by /u/commander_nice [link] [comments]

How does water resistant sunscreen work? Posted: 09 Feb 2020 03:00 AM PST submitted by /u/delicateflower99 [link] [comments]

Can you enlarge the radar cross section of a aircraft? Posted: 08 Feb 2020 10:56 PM PST So if stealth works my making your radar cross section smaller thus having you register as a much smaller object than you really are, can you do the opposite and say make a smallish drone appear as the size of a fighter/bomber to feint an oncoming attack? submitted by /u/cacknibbler [link] [comments]

Many animals (rats, possums, bats, etc.) carry diseases harmful to humans. Do humans carry any diseases harmful to animals? Posted: 08 Feb 2020 12:09 PM PST submitted by /u/virgo911 [link] [comments]

Is the periodic table of elements valid in everywhere in this universe? Posted: 08 Feb 2020 05:50 PM PST submitted by /u/EarlEBirdFlying [link] [comments]

What's actually inside of a piece of amber that appears to have a plant or animal preserved? Is it just an empty cavity in the shape of the animal? Posted: 08 Feb 2020 09:35 PM PST submitted by /u/LisneyDand [link] [comments]

There are viruses that kill bacteria, bacteriophages. Are there any examples of the reverse, bacteria that kill or limit the spread of viruses? Posted: 08 Feb 2020 11:07 PM PST Since the immune system has cells that specifically target viruses, it's possible for "cellular" life to win against viral pathogens. It seems reasonable to assume that part of the bacterial microbiome could play a similar role but my searches are coming up empty on this. submitted by /u/toscaninidacron [link] [comments]

Do new social insects learn from their peers or is their complex behavior mostly or entirely genetic? Posted: 08 Feb 2020 03:09 PM PST Has there been an experimental design where bees or other social insects are put in a situation where from conception they cannot observe any peers? And do they exhibit the same or similar complex social behavior as their peers? Is the neural arrangement that gives rise to their behavior entirely arranged through the formation of their body (genes) or is it sufficiently plastic and dependent on observing other insects for proper functioning? submitted by /u/drowningmelody [link] [comments]

What causes a sore throat when you get a cold? Posted: 08 Feb 2020 10:26 PM PST submitted by /u/kensei- [link] [comments]

Does coughing into your arm spread less germs? Posted: 08 Feb 2020 06:23 PM PST submitted by /u/Major_Fang [link] [comments]

Why did the plague just disappear, it isn't like they had vaccines to eliminate it so where is it!? Posted: 08 Feb 2020 06:23 PM PST submitted by /u/Boopy10017 [link] [comments]

Where does pee from your kidneys go when your bladder is completely full and hasn't been relieved? Posted: 08 Feb 2020 08:20 PM PST submitted by /u/trroptrrop [link] [comments]

Would stomach acid breakdown sand? Posted: 08 Feb 2020 11:42 PM PST submitted by /u/Slayer7th [link] [comments]

Why is the seam of a treadmill belt always on a diagonal? Posted: 08 Feb 2020 12:36 PM PST Is there a scientific or structural reason that the belt seam needs to be diagonal as opposed to horizontal? Or is this purely aesthetic? submitted by /u/Imandelaschicas [link] [comments]

Can a non metal form an amphoteric oxide ? Posted: 08 Feb 2020 09:20 PM PST submitted by /u/Ignited_TNT [link] [comments]

Does the sun have wind? Ive been curious if it was possible? Posted: 08 Feb 2020 03:12 PM PST submitted by /u/FreeFromMySpell [link] [comments]

Where does candle wax go? What does it produce? Posted: 08 Feb 2020 08:52 AM PST Where does the candle wax go when you burn a candle? Does it evaporate? Does it burn into a carbon? How does it effect the air, space in the room it's burnt? submitted by /u/Johnwidentm [link] [comments]

What color would Nitrous Oxide be in a solidified form? Posted: 08 Feb 2020 04:19 PM PST Been wondering forever, sorta Nitrous Oxide enthusiast. Cars, rockets, laughing gas, whipped cream, all awesome. I've always wondered, if reduced to liquid or solid form, what actual color would it be? Tons of research, could never find an answer other than "it's colorless when a gas", but it's gotta have some color when in abundance, right? submitted by /u/TitanicMan [link] [comments]

How much radiation is an astronaut exposed to on the moon? Posted: 08 Feb 2020 09:46 AM PST I know it's meant to be a lot but I need something for comparison. How would it compare to a CT scan? submitted by /u/VickyAlberts [link] [comments]

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Does penis size come from your mother’s side?

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• Does penis size come from your mother’s side?
• Do any animals besides humans perform medicine or first aid?
• Are there any insects that can hunt in packs, similar to mammalian predators?
• What causes the film on hot milk?
• While reading BC Science 7 for fun, I realized that the definition of a pure substance is extremely confusing. How do you define a pure substance? (Details in the text)
• Regression Toward the Mean versus Gambler's Fallacy: seriously, why don't these two conflict?
• Most galaxies have a black hole at their centre, does this mean that galaxies form around black holes?
• What are the sleep cycles like for subterranean animals with little to no access to sunlight?
• How do we precisely and accurately measure small things?
• Why is birth control only 99.7% effective?
• Can a kangaroo walk or must it always hop?
• Why armour of different densities is more effective than a thicker single plate?
• In the age of knowing our own DNA, why are there so many significant differences between humans?
• Could a QR code be deciphered without a computer similar to how we deciphered hieroglyphs?
• Can diseases be transmitted during incubation?
• What does "no indication of a nonlinear relation" mean?
• Do we burn more calories if we have a cold?

Does penis size come from your mother’s side? Posted: 07 Feb 2020 09:42 PM PST submitted by /u/RFEngineer [link] [comments]

Do any animals besides humans perform medicine or first aid? Posted: 07 Feb 2020 06:45 PM PST For instance i know bees and ants will carry their wounded (either away from threats or just in general) but do they try to nurse them back to health or euthanize them? I'm thinking more along the lines of injury than symbiotic cleaning of parasites some fish do. although i'd love to hear all about them too. submitted by /u/Hippoman12 [link] [comments]

Are there any insects that can hunt in packs, similar to mammalian predators? Posted: 07 Feb 2020 09:23 PM PST Further clarification available about this question, if requested. .. watching a very strange movie, figured it was worth a shot. submitted by /u/LordsOfJoop [link] [comments]

What causes the film on hot milk? Posted: 08 Feb 2020 12:09 AM PST I've noticed that when I heat up milk or another liquid that is mostly dairy it forms a thin film on the surface if it gets hot enough. What causes this and is there a way to prevent it? submitted by /u/GeekyGarrett16 [link] [comments]

While reading BC Science 7 for fun, I realized that the definition of a pure substance is extremely confusing. How do you define a pure substance? (Details in the text) Posted: 07 Feb 2020 07:06 PM PST Original text: Is there anything that is not a mixture? What about a bar of pure gold? Pure gold contains nothing but gold. Every sample of pure gold has the same properties as every other sample of pure gold. For example, a nugget of pure gold from Barkerville, British Columbia, has the same melting point, hardness, and density as the nugget of pure gold from Yanacocha, Peru. Pure gold is an example of a pure substance. A pure substance is the same throughout. Every sample of a pure substance always has the same properties. Other examples of pure substances are helium, pure water, and white sugar. Pure substances are homogeneous materials. Homogeneous [hoh-moh-JEEN-ee-uhs] means that every part of the material would be the same as every other part. For example, let's take a piece of chocolate made up of 71% cocoa powder, 11% milk, and 18% water. Now, imagine that another piece of chocolate have the same composition. Then a whole supply chain of this chocolate. It is the same throughout. So is everything a pure substance, assuming that there is another thing on Earth(or beyond) with the same chemical composition? Is everything pure? Then we realize that atoms in every sample of matter is made of electrons, protons, and neutrons, which technically means that it isn't the same throughout. Electrons, neutrons, and protons are made of quarks, held together by gluons, so those aren't the same throughout either. Is there such as thing as a pure substance? Are all things pure substances like I suggested in the first argument? Is there nothing such as a pure substance, like in my second argument? Am I overthinking this? Am I going insane and crazy mulling over this? submitted by /u/JeopardyGreen [link] [comments]

Regression Toward the Mean versus Gambler's Fallacy: seriously, why don't these two conflict? Posted: 07 Feb 2020 11:22 PM PST I understand both concepts very well, yet somehow I don't understand how they don't contradict one another. My understanding of the Gambler's Fallacy is that it has nothing to do with perspective-- just because you happen to see a coin land heads 20 times in a row doesn't impact how it will land the 21rst time. Yet when we talk about statistical issues that come up through regression to the mean, it really seems like we are literally applying this Gambler's Fallacy. We saw a bottom or top skew on a normal distribution is likely in part due to random chance and we expect it to move toward the mean on subsequent measurements-- how is this not the same as saying we just got heads four times in a row and it's reasonable to expect that it will be more likely that we will get tails on the fifth attempt? Somebody please help me out understanding where the difference is, my brain is going in circles. submitted by /u/the_twilight_bard [link] [comments]

Most galaxies have a black hole at their centre, does this mean that galaxies form around black holes? Posted: 07 Feb 2020 04:54 PM PST Given enough time, will enough matter and stars accrete around a black hole to form a galaxy? submitted by /u/IndiaNgineer [link] [comments]

What are the sleep cycles like for subterranean animals with little to no access to sunlight? Posted: 07 Feb 2020 12:51 PM PST submitted by /u/vexed_chexmix [link] [comments]

How do we precisely and accurately measure small things? Posted: 07 Feb 2020 05:34 PM PST Like measuring the size of an atom, or a virus, or bacteria. submitted by /u/CaramilkThief [link] [comments]

Why is birth control only 99.7% effective? Posted: 07 Feb 2020 04:54 PM PST Are the .3% who get pregnant just not taking it correctly and screwing the stats? submitted by /u/CanYouPutOnTheVU [link] [comments]

Can a kangaroo walk or must it always hop? Posted: 07 Feb 2020 11:12 AM PST I've always wondered because I've never seen one walk and I've never read anything about being guitar e Hoppers but I've also noticed a few species of bird seem to only hop instead of ever walk. submitted by /u/Xenomorph_Jesus [link] [comments]

Why armour of different densities is more effective than a thicker single plate? Posted: 08 Feb 2020 03:42 AM PST Remembering early college physics the reasons is that it causes the projectile to tumble. Which breaks the jet of a shaped charge warhead or shatters a kinetic energy penetrator. I need to know the reasons why the tumbling happens. The differing densities cause acceleration and deceleration. Right? a=F/DV. Presuming volume remains constant. But E=DVv2/2. So reduced density should expend less energy. ​ Didn't post flair earlier, reposted with it. submitted by /u/aaronupright [link] [comments]

In the age of knowing our own DNA, why are there so many significant differences between humans? Posted: 07 Feb 2020 04:28 PM PST Many people have already had their DNA genotyped by various companies like 23 and Me. A lot of my friends have theirs and I've been curious about all the raw data we get access to. I realize that we are in no way family related but when comparing things we should have a lot more in common as humans, I still notice a lot of differences. For instance, I was curious about GRID2, a set of genes on chromosome 4 related to motor control. These can be found in mice as well as many other animals. There's about 192 of them all labeled with various SNP numbers. However, very few of mine, about 1 in 10, line up with theirs in terms of SNP number and position. I have a GRID2 gene rs6848132 at genomic position 93241587, my friend doesn't. I assumed we'd have these genes in all the same places but perhaps with different genotypes (i.e. T/T vs A/G) but instead they're entirely missing. Why? What does this mean? submitted by /u/nom420 [link] [comments]

Could a QR code be deciphered without a computer similar to how we deciphered hieroglyphs? Posted: 07 Feb 2020 05:46 AM PST submitted by /u/HaniHaeyo [link] [comments]

Can diseases be transmitted during incubation? Posted: 07 Feb 2020 01:49 PM PST submitted by /u/karadam51 [link] [comments]

What does "no indication of a nonlinear relation" mean? Posted: 07 Feb 2020 01:18 PM PST I was reading a paper about correlations between obesity and different food groups, and a couple of times the words "no indication of a nonlinear relation" came up. What does this mean? It seems pretty vague, and a friend of mine said it sounded like a double negative. I tried asking about this on Quora, but my account got moderated because I'm not using my real name. So I'm asking here. The paper in question is here: https://academic.oup.com/advances/article/10/2/205/5364424 submitted by /u/zauberexonar [link] [comments]

Do we burn more calories if we have a cold? Posted: 07 Feb 2020 05:24 AM PST Whenever I get a cold I have it for 1-4 months. I spend about 40-50% of the year constantly sneezing/producing bucketloads of snot. I fill about a trashcan almost daily with tissues from blowing my nose. Since my body wants to protect me during my colds it generates all that snot, or so I've heard. What I'm wondering about my body constantly over producing snot, is that causing me to burn more energy than a healthy individual? I'm assuming if your body is fighting a viral infection it by default requires/burns through more energy compared to a healthy individual. Is the snot production during a cold notabel? I always thought this had to make a huge difference, this snot can't keep coming from nowhere right? submitted by /u/low-zen [link] [comments]

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What is actually happening when an image is out of focus and how do lenses focus them?

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• What is actually happening when an image is out of focus and how do lenses focus them?
• Do we burn more calories when we work our brain harder?
• Can cravings for specific food be a symptom of deficiency?
• What is a Turing machine and what is the difference between a deterministic and non-deterministic one?
• What sets the operating temperature limit for CPUs and GPUs, and could we increase it?
• Is there a mutation that adds new genetic information?
• How exactly are things cooled?
• Do horse flocks, wolf packs, and other social animals have gender roles like bees and ants?
• Except for lack of hunting ability/instinct, is there anything preventing herbivorous animals from eating meat?
• If we launched something straight into space what would be the chance that we hit something?
• Can the partition coefficient of a solute also be calculated as the ratio of it's mass dissolved in one substance to mass dissolved another substance?
• Is there a visible difference in sun angle or distance to the sun on March 1st of a leap year?
• If we had telescopes capable of seeing billions of light years away and we looked at an area of space 15 billion light years away, would we see what the universe was like before the big bang? If not then what would we see
• What race are the people of North Sentinel Island?

What is actually happening when an image is out of focus and how do lenses focus them? Posted: 07 Feb 2020 01:48 AM PST I have a strip of film which I was trying to project onto a wall using a torch. I noticed the image was out of focus, but I don't understand why. submitted by /u/14051 [link] [comments]

Do we burn more calories when we work our brain harder? Posted: 06 Feb 2020 08:42 PM PST submitted by /u/FamousArticle [link] [comments]

Can cravings for specific food be a symptom of deficiency? Posted: 07 Feb 2020 04:29 AM PST Is there any evidence that cravings for a specific food can be a symptom of deficiency of some nutrients, that can be replenished through eating that food? People often make that claim, I'm wondering if that's backed by science. submitted by /u/EquilateralCircle [link] [comments]

What is a Turing machine and what is the difference between a deterministic and non-deterministic one? Posted: 07 Feb 2020 02:53 AM PST submitted by /u/upordown_uraclown [link] [comments]

What sets the operating temperature limit for CPUs and GPUs, and could we increase it? Posted: 07 Feb 2020 07:05 AM PST CPUs and GPUs vary in their max recommended operating temperature, but usually it's around 80ish (Celsius) for CPUs and 90ish for GPUs. This of course is not a hard cut off, but just a best practice for keeping everything in good condition longer. What sets these upper recommended limits and how difficult would it be to extend them a few degrees? If we could safely operate at, say 105 degrees, it might open the door for useful phase change cooling with water. submitted by /u/thernometer [link] [comments]

Is there a mutation that adds new genetic information? Posted: 06 Feb 2020 08:34 PM PST submitted by /u/TripleReverse-Card [link] [comments]

How exactly are things cooled? Posted: 07 Feb 2020 03:55 AM PST So, I just wanted to know how exactly we make something colder, like when you think about it the only way we cool something down is either by leaving it or putting it next to something i.e. an ice cube. A perfect example would be 0 kelvin, how do you achieve that when everything around it is transferring energy to it? submitted by /u/throwaway135961 [link] [comments]

Do horse flocks, wolf packs, and other social animals have gender roles like bees and ants? Posted: 07 Feb 2020 06:06 AM PST I ask this because I look up a lot of bee and ant colonies, and what so many of them have in common is that they have gender roles, with females making up the queens and workers, and the males making up the drones and possibly soldiers. And I thought that horses, wolves, and other social animals would have had gender roles similar to bees and ants. So are there gender roles in other social animals outside of just bees and ants? submitted by /u/Commander_PonyShep [link] [comments]

Except for lack of hunting ability/instinct, is there anything preventing herbivorous animals from eating meat? Posted: 07 Feb 2020 01:54 AM PST I know you need specialized organs to digest grass/leaves. Is the same true for meat? Similarly, are carnivores able to consume fruits? Those seem less hard to digest than grass. At first glance you would think being an omnivore is evolutionary speaking the best strategy. submitted by /u/Huntress__Wizard [link] [comments]

If we launched something straight into space what would be the chance that we hit something? Posted: 07 Feb 2020 07:27 AM PST If we choose a random point on the planet and just launched something in a straight direction off the surface, how likely is it that would it eventually hit something or is space empty enough that it would go on forever without hitting anything? submitted by /u/average_at_life [link] [comments]

Can the partition coefficient of a solute also be calculated as the ratio of it's mass dissolved in one substance to mass dissolved another substance? Posted: 07 Feb 2020 06:42 AM PST This is assuming the volumes of both the liquids are equal(50ml), for example. submitted by /u/Runzerpi [link] [comments]

Is there a visible difference in sun angle or distance to the sun on March 1st of a leap year? Posted: 07 Feb 2020 04:29 AM PST Does March 1st 2020 at noon look different than March 1st 2017? Even by a minuscule amount. Would the distance to the sun be different? Thanks for the help! submitted by /u/SciFidelity [link] [comments]

If we had telescopes capable of seeing billions of light years away and we looked at an area of space 15 billion light years away, would we see what the universe was like before the big bang? If not then what would we see Posted: 06 Feb 2020 04:09 PM PST submitted by /u/Sir_DogMeat [link] [comments]

What race are the people of North Sentinel Island? Posted: 06 Feb 2020 06:27 PM PST submitted by /u/nathanielawesome [link] [comments]

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