Do astronauts need to clean the outside of space station windows? |
- Do astronauts need to clean the outside of space station windows?
- Why is gravity considered the weakest fundamental force when the strong and weak nuclear forces only affect subatomic particles?
- I'm curious about the evolution of viruses. There are DNA and RNA viruses, but what are the advantages of having one on the other nucleic acid? Did the DNA viruses evolve from the RNA viruses or did they both evolve separately? Are DNA viruses more stable outside a host?
- Why does audio feedback always resolve to a high pitch tone regardless of the input frequency?
- Why does pathogens make it's host sick?
- How does flash memory store data even when no voltage is applied?
- Would we have been able to develop the same vaccines in, say, 90s? How many losses would there be if COVID-19 happened in 90s?
- Does the overuse of antibiotics have negative consequences in terms of reduced effectiveness at the community level or the individual level?
- Considering that the sun is growing, and will eventually engulf earth in like 5 billion years, was the sun noticeably smaller 250 million years ago? 500 million years ago? 1 billion?
- What happened to locust swarms in the US? They were once a major issue and then just seemed to stop, what happened in the US that led to this disappearance when they are still problems elsewhere around the world?
- What is mass?
- How is a mass spectrometer calibrated, its system suitability and performance tested when it's attached to a rover on the surface of another planet?
- Why do copper pans not work on induction stoves?
- Are asymptomatic people meaningful vectors of transmission of COVID-19?
- What exactly cause hiccups?
- What causes a lightning bolts structure?
- Do we know what’s under Mars surface?
| Do astronauts need to clean the outside of space station windows? Posted: 28 Nov 2020 04:28 PM PST |
| Posted: 28 Nov 2020 05:46 PM PST |
| Posted: 29 Nov 2020 02:04 AM PST |
| Why does audio feedback always resolve to a high pitch tone regardless of the input frequency? Posted: 28 Nov 2020 06:17 PM PST |
| Why does pathogens make it's host sick? Posted: 28 Nov 2020 11:20 PM PST Wouldn't it make more sense to not give the host a reason to get rid of it? [link] [comments]  |
| How does flash memory store data even when no voltage is applied? Posted: 28 Nov 2020 08:55 PM PST |
| Posted: 28 Nov 2020 08:02 PM PST |
| Posted: 28 Nov 2020 09:09 PM PST I've heard that the overuse of antibiotics — especially taking antibiotics even when they're not the appropriate treatment — promotes antibiotic resistance. Is this an individual condition or am I negatively impacted if my community overuses antibiotics even if I do not? [link] [comments]  |
| Posted: 28 Nov 2020 10:06 PM PST |
| Posted: 28 Nov 2020 09:35 PM PST Reading historical works, locust swarms seemed fairly common in the US and then just stopped. Is there a scientific consensus as to what caused this decline? How is the US different than other areas of the world that still experience locust swarms? [link] [comments]  |
| Posted: 28 Nov 2020 09:27 PM PST If atoms are protons made of two up quarks and one down quark, and neutrons contain two down quarks and one up quark and electrons are thought to have no internal structure, meaning that researchers think about them as zero-dimensional points that take up no space how does a magnetic light show have physical mass? [link] [comments]  |
| Posted: 28 Nov 2020 02:12 PM PST I've had this thought today when trying to figure out why my internal standard recovery was so low for one of our aglient ICP-MS instruments. How on earth (or Mars rather) do you remotely assess the performance of such an instrument when you can't physically access it? Do they launch the instrument with calibration standards on board? How does the instrument maintain its self in the absence of an analyst? [link] [comments]  |
| Why do copper pans not work on induction stoves? Posted: 28 Nov 2020 09:33 AM PST Induction cooking works by inducing eddy currents in a pan, right? And copper is used in demonstrations where a falling magnet slows down because it's kinetic energy is converted into heat due to eddy currents. So why do copper pans not work on induction stoves? [link] [comments]  |
| Are asymptomatic people meaningful vectors of transmission of COVID-19? Posted: 28 Nov 2020 01:40 PM PST Two of the main symptoms of the flu are sneezing and coughing. These symptoms also help A LOT in transmitting a respiratory disease. Considering that COVID-19 asymptomatic people don't sneeze or cough, are they really meaningful vectors of transmission? [link] [comments]  |
| Posted: 28 Nov 2020 12:54 AM PST I was very curious from last few days to know what actually cause hiccups please explain in simple words [link] [comments]  |
| What causes a lightning bolts structure? Posted: 28 Nov 2020 03:36 AM PST recently I saw this tik tok: https://vm.tiktok.com/ZMJX6AMoy/ It got me wondering, if lightning is always seeking the most direct path to the ground (in retrospect I don't know if this is true, it's just what I've been told in school growing up) why is it that lightning always appears jagged and branching in multiple directions instead of in a straight line down? What exactly is it following through the air that dictates its path? Why does the same bolt seeming flash multiple times in varying levels of brightness like in the video? And why is it that lightning itself looks so different from Lichtenberg figures? [link] [comments]  |
| Do we know what’s under Mars surface? Posted: 28 Nov 2020 04:00 AM PST Will we look for fossils when we get to Mars? Or materials like Iron? Could we discover a new element on Mars? [link] [comments]  |
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