Is the Japanese surgical/dust mask trend actually helping lower the % of people getting sick over there? |
- Is the Japanese surgical/dust mask trend actually helping lower the % of people getting sick over there?
- Does the temperature of food increase linearly in a microwave?
- Do prions affect viruses?
- Does a Photon Have a Set Amplitude? Does it Make Sense to Ask That Question?
- What are the nuclear propulsion systems viable for ballistic missiles?
- Does the heart get microtears like any other muscle? And if it doesn't, why can it keep going non stop unlike say your bicep?
- Why doesn't the galvanized zinc coating on steel crack off during expansion and contraction due to the different coefficients of thermal expansion?
- Why are certain disorders (Sickle Cell Anemia) linked to ONLY 1 mutation, whereas others (PKU) are linked to over 500 mutations?
- How exactly do NSAIDS (like ibuprofen) increase the risk of heart attacks?
- Why do other planets and moons have so many craters but earth does not?
- What object shape and material can attain the highest terminal velocity during free fall?
- Light from distant stars is from millions of years ago... if we could see far enough wouldn't we see light from the big bang in all directions?
- How is chemistry possible pre 19th century?
- Are there groups of animals where "A and B can have fertile offspring", "B and C can can have fertile offspring", but "A and C cannot"?
- What is the naming system of time periods?
- What happens if you give a patient a non-compatible blood type? Eg. an O- patient is given AB+ blood.
- What causes the blurry line on the edge of a shockwave?
- When you see a picture of a friend or relative on social media, (particularly a profile picture) does your brain respond the same way it would if you saw them in person?
- How do you calculate the focal length of a multi-lens setup?
- Can someone with a weakened immune system receive a vaccine?
- How do space organizations, like NASA, communicate with all these probes and devices at such long distances?
- Are neutrons fired from somewhere to get a fission reaction started?
| Posted: 28 Feb 2018 03:30 PM PST Have there been actual studies? Or how about just comparing their infection vs population rates to begin with? [link] [comments]  |
| Does the temperature of food increase linearly in a microwave? Posted: 28 Feb 2018 08:00 PM PST |
| Posted: 01 Mar 2018 06:42 AM PST We use viruses to attack bacteria. So I thought, why not use prions to attack viruses by targeting their protein shells? There's a ton of other questions surrounding that suggestion, but I wanted to start with what I thought was a simple question. I'm not finding any research on if prions affect viruses at all, though. [link] [comments]  |
| Does a Photon Have a Set Amplitude? Does it Make Sense to Ask That Question? Posted: 01 Mar 2018 07:20 AM PST For a while now I've had a couple issues with my interpretation of light. My fundamental picture of light is a vibration in the electromagnetic field. I tend to imagine a ripple in a sheet or something similar propagating out. My main questions: Is a photon just that? A ripple in the electromagnetic field? Do different energy photons have different amplitudes as well as frequencies? When explaining light waves are we talking about the same 'ripple' in the EM filed as I take a photon to be? My confusion stemmed mainly from when I saw a gif showing a sine wave made up of little balls (photons) that was supposed to be demonstrating what light 'is' I'm not very confident in my conception of light. Anyone able to clear some stuff up would be much appreciated!! THANKS P.S When talking about QFT are the ripples in the fields that make up the particles the same thing I'm talking about ^ up there ^ or something more abstract to do with probability functions? [link] [comments]  |
| What are the nuclear propulsion systems viable for ballistic missiles? Posted: 01 Mar 2018 04:28 AM PST President of Russia Vladimir Putin just delivered a speech to the federal assembly (Russian variant of the American State of of Union speech). In that speech he talked at length about and showed videos of the nuclear ballistic missile with 'virtually unlimited flight time/distance, powered by nuclear propulsion systems, able to freely manoeuvre and avoid any conventional defences'. Which methods of nuclear propulsion are there beside project orion? Are there any viable for ballistic missiles? Could they be used for space launches too? What are the possible technologies involved? Please let me know if this is the wrong subreddit, but I am really interested not in the political, but scientific and technological side of this thing. [link] [comments]  |
| Posted: 28 Feb 2018 09:36 PM PST |
| Posted: 01 Mar 2018 07:02 AM PST |
| Posted: 28 Feb 2018 09:31 PM PST Sickle Cell anemia is linked to one mutation, whereas PKU, and several others, are such that "over 500 mutations" are identified that cause the disorders. Why is this? Are some mutations more common than others? Do the proofreading methods only work in certain parts of DNA? [link] [comments]  |
| How exactly do NSAIDS (like ibuprofen) increase the risk of heart attacks? Posted: 01 Mar 2018 07:52 AM PST |
| Why do other planets and moons have so many craters but earth does not? Posted: 01 Mar 2018 07:22 AM PST I saw this picture of Pluto and saw the sheer amount of craters on the surface and compared it to our moon. Then I figured, mars has a large amount of craters too, but earth does not? Image: https://twitter.com/cosmossup/status/968779684732338176?s=21 [link] [comments]  |
| What object shape and material can attain the highest terminal velocity during free fall? Posted: 01 Mar 2018 07:15 AM PST Everything has wind resistance, eg, coins will flip over and over. Will a ball reach the highest speed? Something else? What material would be best if it even matters? [link] [comments]  |
| Posted: 28 Feb 2018 07:17 PM PST Making existence one big light sphere of space and time? [link] [comments]  |
| How is chemistry possible pre 19th century? Posted: 28 Feb 2018 07:38 PM PST How did scientist from the 1800's and earlier know about chemical structures? The first chemical equation was drawn in 1615 by Jean Beguin. How is that possible? [link] [comments]  |
| Posted: 01 Mar 2018 05:14 AM PST I was thinking about the fuzzy definition of species and I think I might have heard of living animal groups like this. Are there examples of this? Is there a term for this kind of relationship? Can the relationship be very continuous with many intermediates between two groups? If we could create any conceivable animal we wanted, could we create a line of intermediate breeders between any two species? In some definitions, would that make those two now the same "species"? Thanks. [link] [comments]  |
| What is the naming system of time periods? Posted: 28 Feb 2018 01:03 PM PST From what I can tell, Eons are the biggest time period. And they are split up into eras, which are then split into periods. What determines a change in period, era and eon? How long can each one be? Is there anything shorter than a period? Longer than an eon? Basically my question is, how is time divided? Sorry if I'm unclear. [link] [comments]  |
| Posted: 28 Feb 2018 07:07 AM PST |
| What causes the blurry line on the edge of a shockwave? Posted: 01 Mar 2018 12:02 AM PST Here's a recent post from /r/shockwaveporn that shows it very clearly. What is this exactly? Does the pressure from the blast compress the air to the point it changes how the light from the background moves through it, causing the blur? [link] [comments]  |
| Posted: 28 Feb 2018 08:10 PM PST I wondered if profile pictures could become familiar to you in the same way that a face is. [link] [comments]  |
| How do you calculate the focal length of a multi-lens setup? Posted: 01 Mar 2018 02:57 AM PST I'm trying to make a tool for my lab at work that calculates the effective focal length, back focal length and forward focal length of a doublet lens based on the dimensions and refractive index of the individual lenses. I'm not sure if my equations are just too simplified or I'm wrong altogether. So far I'm just using the equation P = P1 + P2 -dP1P2 where P is the power and d is the separation between individual lenses. Can anyone direct me to a derivation of how something like this tool here works? http://www.optolife.com/focal_length.html [link] [comments]  |
| Can someone with a weakened immune system receive a vaccine? Posted: 28 Feb 2018 08:36 PM PST I was wondering if the weakened form of the virus would have free reign over the body due to the fact that the immune system can't do away with it. [link] [comments]  |
| Posted: 28 Feb 2018 06:26 PM PST For example things like the Mars Curiosity rover, the probe we sent to Jupiter, etc. [link] [comments]  |
| Are neutrons fired from somewhere to get a fission reaction started? Posted: 28 Feb 2018 06:26 PM PST In a power plant, I know that U-235 gets hit by a neutron then splits to Krypton and Barium releasing more neutrons to hit more U-235 atoms, etc. What I'm wondering is when the fuel rods are first dipped in the water, where do the initial neutrons come from to get the reaction started? Is there a machine that fires neutrons at the fuel rods? [link] [comments]  |
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