How can 30-40 GPS satellites cover all of the world's GPS needs? |
- How can 30-40 GPS satellites cover all of the world's GPS needs?
- Can our eyes feel temperature?
- Why don't astronauts on the ISS wear lead-lined clothes to block the high radiation load?
- Where is there more gravity? In the center or the surface of a planet?
- Why are rocket fuels like Hydrazine (N2H4) and other hypergols so toxic?
- Are all omicron cases directly linked back to a single case? Or could they have arisen independently?
- Is there a difference in your level of immunity between getting COVID first and then the vaccine vs vaccine first and then exposure to COVID?
- How do signals from our equipment on other planets make it through the earths core?
- Does repeated exposure to Covid increase the risk of a breakthrough infection?
- How does a dummy piston / balance piston work on a steam turbine?
- How does slingshotting around planets not break the laws of physics?
- Does the vaccine reduce transmission of the Delta variant?
- Why is the gender gap in life expectancy so low for some countries and so high for others?
- What impact would anti viral pills have on COVID recovery anti-bodies?
- When it’s said that the mantle is fluid, how fluid are we talking here? What kind of texture is it?
- What devices detect and measure airborne particles?
- How does GPS give turn by turn directions?
| How can 30-40 GPS satellites cover all of the world's GPS needs? Posted: 03 Dec 2021 05:35 AM PST So, I've always wondered how GPS satellites work (albeit I know the basics, I suppose) and yet I still cannot find an answer on google regarding my question. How can they cover so many signals, so many GPS-related needs with so few satellites? Do they not have a limit? I mean, Elon is sending way more up just for satellite internet, if I am correct. Can someone please explain this to me? Disclaimer: First ever post here, one of the first posts/threads I've ever made. Sorry if something isn't correct. Also wasn't sure about the flair, although I hope Engineering covers it. Didn't think Astronomy would fit, but idk. It's "multiple fields" of science. And ~ thank you! [link] [comments] |
| Can our eyes feel temperature? Posted: 03 Dec 2021 04:55 PM PST I know this sounds dumb but I noticed today while it was near freezing that my eyes are the only part of my face that wasn't immediately or subsequently cold. Is this just because we blink a lot, or smaller blood vessels, or what? [link] [comments] |
| Why don't astronauts on the ISS wear lead-lined clothes to block the high radiation load? Posted: 02 Dec 2021 07:11 PM PST They're weightless up there, so the added heft shouldn't be a problem. [link] [comments] |
| Where is there more gravity? In the center or the surface of a planet? Posted: 03 Dec 2021 09:08 AM PST |
| Why are rocket fuels like Hydrazine (N2H4) and other hypergols so toxic? Posted: 03 Dec 2021 03:47 PM PST So in my field of work occasionally we have some nasty chemicals around like N2H4 hydrazine. We always have a load of safety measures around it and I understand the hazards around pressurized systems, heat from reaction, containment etc but everyone always says it's incredibly toxic and carcinogenic. My background is in physics and engineering, not biology and I've always been curious WHY it's so carcinogenic. What is it doing to your body that your body hates so much? It's it a burning damage that it causes your organs that are then damaged so much it can lead to cancer or is there more going on? Thanks Edit: just to clarify I'm curious as to the biological or chemical reactions that make Hydrazine dangerous to human bodies. I understand the hazards from a combustion/press system/explosion standpoint, and I know it's dangerous humans past that But why does inhaling some send you to the hospital? What is it doing to your body? I feel like there is more going on than just internal burning line you'd see with peroxide or simply caustic chemicals. [link] [comments] |
| Posted: 03 Dec 2021 01:24 PM PST Basically the title- are different variants unique enough that they would have spread from one source, or could it be a "logical" mutation that could occur independently in different areas? [link] [comments] |
| Posted: 03 Dec 2021 11:57 AM PST TL/DR is there a difference between getting COVID and then the vaccine VS getting the vaccine and getting exposed to COVID in our immune response. When it comes to post-infection immunity (Natural Immunity as it's so commonly called) I am a bit confused, as someone who has their two doses and will get their booster when eligible is it still possible for me to build a more robust defense by being exposed to the full virus despite being immunized? As the mRNA vaccines aren't sterilizing does getting exposed to the live virus (but not getting sick) give my body enough opportunity to build a fuller picture immune response? [link] [comments] |
| How do signals from our equipment on other planets make it through the earths core? Posted: 03 Dec 2021 08:36 AM PST Or do we wait to send signals and pictures back until the receiving side of the earth is facing the direction the signal is coming from? [link] [comments] |
| Does repeated exposure to Covid increase the risk of a breakthrough infection? Posted: 03 Dec 2021 03:57 PM PST Is the risk of a breakthrough infection mostly systematical or statistical? So is there simply a subset of people who will not have adequate protection after being vaccinated, or would everybody get sick eventually if they were exposed often enough? I seem to remember that for different vaccines, it's mostly that some people just don't respond well, but I can't find anything to back this up. [link] [comments] |
| How does a dummy piston / balance piston work on a steam turbine? Posted: 03 Dec 2021 02:30 PM PST I'm trying to figure out how they reduce the axial thrust on the rotor. [link] [comments] |
| How does slingshotting around planets not break the laws of physics? Posted: 03 Dec 2021 07:45 AM PST Spaceships or probes supposedly use large gravitational bodies as a "slingshot" to build up speed, but... how? No matter the angle, you go towards it, and then you go away from it. How can you get more speed/energy out of this? By this logic, you could keep slingshotting around a handful of planets and keep going faster and faster forever, but this doesn't seem right at all. Can someone please explain? [link] [comments] |
| Does the vaccine reduce transmission of the Delta variant? Posted: 03 Dec 2021 05:52 AM PST Are there any studies on the transmission of the delta variant and whether the Pfizer/Moderna vaccines reduce transmission? [link] [comments] |
| Why is the gender gap in life expectancy so low for some countries and so high for others? Posted: 02 Dec 2021 08:59 PM PST I was looking at the life expectancy for different countries for fun and noticed the gender gap differed quite a lot and doesn't even seem consistent across similar countries. (This is all 2018 data) Nigeria has the smallest gap I could find: 1 year. Men and women live a pretty similar length there. But other high poverty countries have a much bigger gap. Egypt is 5 years. Ethiopia is 4. Then we have more developed countries, with the smallest gap I could find being Sweden, with 4 years. Finland is 6. Why is there such a wild difference even among similar countries? [link] [comments] |
| What impact would anti viral pills have on COVID recovery anti-bodies? Posted: 03 Dec 2021 05:28 AM PST Was talking to friends about news that Pfizer's anti viral pills wouldn't be negatively impacted by the new variants & got asked if these pills would stop your body from developing anti bodies that you'd normally get from a COVID recovery. So would you have to keep taking the pills every time you tested positive? Couldn't find anything online about it so figured I'd ask here & see if anyone here knew anything. Thanks for reading. [link] [comments] |
| When it’s said that the mantle is fluid, how fluid are we talking here? What kind of texture is it? Posted: 02 Dec 2021 02:06 PM PST |
| What devices detect and measure airborne particles? Posted: 02 Dec 2021 08:57 PM PST Additionally, what units do they measure in? And what is a range of possible measurements one might get for airborne pollen during spring? [link] [comments] |
| How does GPS give turn by turn directions? Posted: 03 Dec 2021 08:10 AM PST I saw another question asking about GPS and it made me want to ask a question I've always wondered. How does GPS calculate a map with precise turn by turn directions, and expected arrival times? I know the US military had GPS in the 90's which was a huge advantage in the Gulf War, but when the technology existed then did it have that capability? [link] [comments] |
| You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google, 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment