| If the JWST tried to take a picture of Earth and had been properly calibrated/designed to do so, how magnified would the picture be? Posted: 29 Apr 2022 07:55 AM PDT |
| How do we fall asleep? Posted: 28 Apr 2022 08:20 PM PDT |
| Will we get color images from the James Webb Space Telescope? Posted: 29 Apr 2022 06:44 AM PDT So far the only images we've seen are from calibration and they're monochromatic. Does JWST have different filters or sensors for different wavelengths of light that can be combined to generate a color or false color image? submitted by /u/baseketball [link] [comments] |
| Why does adding a single extra oxygen atom to H20, which is something we need to survive and drink daily, suddenly causes it to become extremely toxic to even breathe? (H202) Posted: 29 Apr 2022 05:37 AM PDT |
| Do creatures surviving (or thriving) on radioactivity have any basis in reality outside of fiction? (example: godzilla, fallout ghouls) Posted: 29 Apr 2022 12:29 AM PDT This probably sounds pretty stupid but...I mean, you hear it enough times, you have to wonder, right? I mean forgive me if I'm oversimplifying or misinformed but I was told that radiation was a wave of matter-scrambling anti-life that fucks your DNA. Alot of media treats it like a poisonous gas that certain life can acclimate to. Is there even a purely hypothetical life form that could actually make any of that a positive? submitted by /u/D3wdr0p [link] [comments] |
| Are there studies showing the impact of anti-COVID vaccination attitudes on vaccination rates against other diseases? Posted: 29 Apr 2022 06:34 AM PDT Have those who are against the COVID vaccines also turned against other vaccines they used to get without hesitation? submitted by /u/hwc000000 [link] [comments] |
| Can very weird gravity field create any kind of trajectory? If not, which kind of curves can be trajectories? Posted: 29 Apr 2022 05:06 AM PDT More specifically, given the Newtonian law of gravity (force in m/r2) and an arbitrary 3D curve, can I construct a static mass field in which this curve is a trajectory? First thoughts: Obviously, one can think of non trivial curves that work, but not all curves satisfy this condition (at least they have to be continuous and have some regularity, I would assume), then my question is what does the family of said curves look like? In more mathematic words, what is the set of solutions to equations of the form: d2x/dt2 = integral_space ( M(r)/(r-x)2 dr) Let's say M>=0, is static, and can include Diracs (or not?). It's like solutions to the heat equation all can be expressed in a similar form. What does solutions to the gravity equation look like? The question came to me when walking this morning and has bothered me since… happy to hear people's perspective on this. submitted by /u/JustaCitizenofEarth [link] [comments] |
| Does the vestibular system HAVE to be located on the sides of your head? Posted: 29 Apr 2022 04:28 AM PDT Is there any reason why it has to be located by the ears, or could it be located elsewhere on the face/body to accurately judge movement and direction? submitted by /u/justkidding1043 [link] [comments] |
| Energy can be neither created or destroyed. All enegry in the universe has been present since the big bang. In our bodies enegy is turned into to ATP for us to use. The sun stores and emits massive amounts of energy. My question is on a fundamental level, what is energy? Posted: 28 Apr 2022 10:44 PM PDT |
| Do we normally get exposure to the flu even when we don't catch it? Posted: 28 Apr 2022 04:24 PM PDT The title isn't great so I will try to explain better here. In Australia we have had basically no flu for the last two years. They are worried that this year will be a bad season, particularly for young children under the age of two who have had no exposure to it before. But normally we only get flu every several years anyway, so I'm just wondering by that do they mean that there is just a larger number of people who haven't caught it and are therefore vulnerable to it, or does having it in the community give us low levels of exposure to it normally? (Enough to give us some protection to it.) Meaning all those young children are more vulnerable to it. Hope that makes sense. submitted by /u/778899456 [link] [comments] |
| Can cysts be contagious? Posted: 28 Apr 2022 08:45 PM PDT I got a pilonidal cyst / abscess about a month ago. I was prescribed antibiotics, and it went away. This week, my girlfriend got one. I can't imagine it's "contagious," but maybe caused by similar environmental factors—however, we don't live together, work together, etc. Could this just be a coincidence? submitted by /u/15ItemsOrLess [link] [comments] |
| What happens to radio waves when reflected/bounced to other paths? Posted: 29 Apr 2022 12:19 AM PDT I'm interested to learn how radio transmission works. In network transmission specifically when data is being carried by Internet Protocol, the packet will traverse every router until the packet arrives at the destination host. I read that radio waves bounces. Does that mean that some radio waves that were transmitted by a radio transmitter will never land on the receiver? If that's the case, radio transmission is a best-effort delivery like UDP protocol. It just transmits and transmits and whatever is received by receiver, it gets decapsulated. submitted by /u/Oxffff0000 [link] [comments] |
| Biochemists! Is there any reason phytol (the tail of chlorophyll) is almost completely saturated? Posted: 28 Apr 2022 07:06 PM PDT Supposedly the biosynthesis of this molecule involves isoprene, a monomer of natural rubber, but even polyisoprene molecules have a lot of double-bonds. What am I missing? Sorry in advance if this is a dumb question. submitted by /u/Billiam_Ball [link] [comments] |
| Does hypovolemia cause metabolic acidosis or alkalosis? Posted: 29 Apr 2022 03:10 AM PDT I read that shock causes metabolic acidosis because decreased perfusion causes a switch from aerobic to anaerobic metabolism causing lactic acidosis. But I also read that volume contraction causes "contraction alkalosis" because of the increased aldosterone secreted to compensate for volume loss, which causes increased H+ secretion with subsequent metabolic alkalosis. And so, does hypovolemia cause acidosis or alkalosis or does it depend on the situation? I am not sure if this explanation is correct: - if the hypovolemia was severe enough to compromise perfusion to organs -> lactic acidosis (metabolic acidosis) - if there is hypovolemia but perfusion to tissues is still adequate -> metabolic alkalosis Am I thinking of this correctly? submitted by /u/MedSJO [link] [comments] |
| Why do we push so much on saving water? Posted: 29 Apr 2022 01:42 AM PDT I get that is important, but isn't water "easily" cleanable compared to other resources? In all the processes we use water it doesn't get transformed like gas that burns and disappears, it just gets dirty, so why is it so important to save water if it doesn't actually get lost after most processes? submitted by /u/FederLa [link] [comments] |
| How did the extended mandibular symphysis evolve in separate species? Posted: 29 Apr 2022 04:19 AM PDT Barbourofelis and Thylacosmilus are two unrelated extinct mammalian predators, with the former being a feliform placental mammal and the latter being a marsupial. Despite that, along with their saber-teeth, the two have also convergently evolved extended mandibular symphyses. How did the adaptation arise in the two respective lineages, what evolutionary advantage did it provide, and why isn't it more common in other saber-toothed animals? submitted by /u/bigasshuntsmanspider [link] [comments] |
| How is tuberculosis actually transmitted? I've been searching for quite a while now but cannot find a "definitive" answer. Posted: 28 Apr 2022 02:29 PM PDT I haven't got into the academic/medical journal but from websites like who, cdc, nhs etc. it is stated that it can only be transmitted through the air when the person that got TB talks with another person. CDC even stated it cannot spread by kissing (hhmm what??) it just doesn't make sense to me that this bacteria can survive months outside the human body but it cannot spread by kissing? can it spread through food if the food is prepared by an infected person, or perhaps by using utensils handled by an infected person? if the bacteria can survives months outside the human body, isn't it only logical that it can spread through food, utensils and surfaces too? and close contact like kissing? Thank you in advance submitted by /u/Stoicamphora [link] [comments] |
| Does the mass trade of foods like fruits and vegetables between different areas change their soils and hydrology? Posted: 28 Apr 2022 12:17 PM PDT So I had this thought while eating an imported cucumber from Spain today. Since it's grown in spanish soil, it absorbs nutrients and water from the local soil. When I consume it in Germany, the remains presumably don't make it back to Spain, but stay in Germany after making their way through the local sewage system and a water treatment plant. So if large numbers of foods are exported from Spain to other places over long periods of time, could that lead to a depletion of soils and water ressources in Spain? And does that increase the amount of water and other things elsewhere? Or is the total amount transported just too small to be significant and measurable? submitted by /u/chemistry_jokes47 [link] [comments] |
| When making bread is there a difference between using more yeast and just letting the dough sit for longer? Posted: 28 Apr 2022 11:21 AM PDT So I do a no knead bread that involves letting the bread ferment for a long time, 2 - 5 days in the fridge. Is the yeast multiplying when I do this? Would it be the same if I used twice as much yeast and let it sit for, say, half the time? What about half as much for twice the time? submitted by /u/Flopsey [link] [comments] |
| Two cars, totally identical in every way, both hit a brick wall at 50 mph. Car one had been accelerating from 0mph at the moment of impact and car two had been decelerating from 100mph at the moment of impact. Does one car hit the wall with more force that the other? Posted: 28 Apr 2022 09:55 PM PDT |
| Of the infectious diseases that were the leading causes of death in the 1850s, which ones are now easily curable and which are still dangerous? Posted: 28 Apr 2022 11:14 AM PDT I found this display at a science museum in San Diego which showed the leading causes of death in 1850, all infectious diseases. If I (a 20-something woman with normal medical history) were diagnosed with any of these tomorrow morning, will I survive and/or be cured? Which of theses diseases are still a real threat? - Tuberculosis
- Dysentery/diarrhea
- Cholera
- Malaria
- Typhoid Fever
- Pneumonia
- Diphtheria
- Scarlet Fever
- Meningitis
- Whooping Cough
submitted by /u/avalon-girl5 [link] [comments] |
