Does the gut bacteria of an alcoholic differ from a non drinker? |
- Does the gut bacteria of an alcoholic differ from a non drinker?
- Mars rover Opportunity was built to last 90 days, and lasted 15 years. Voyager aircrafts were built for five year mission and lasted 41 years. Please explain if these crafts were over-designed or Nasa just got lucky?
- Why do some electronic items continue working temporarily when unplugged?
- Does a planet's rotation speed and distance from its star influence the precession of its axis? And can the earth's precession be seen as "normal" compared to other planets?
- What Mammals become sexually mature the quickest?
- Why can't we have a perfectly monochromatic light?
- Quantisation of space, energy, time fields. Is quantisation real?
- Do children generally aquire language at similar ages across the world?
- Why did the Pascal replace the Bar as the standard unit of measurement for atmospheric pressure?
- How much does the "particle in a box" model need to be modified to fully accurately represent the interior of an atom?
- There is a small fan on helicopters' tail. What is the purpose of that fan as it already has one big fan?
- Why are some animals who lay eggs still called mammals?
- Is the (still unobserved) “glueball” (i.e. a gluon-gluon pair) a suitable potential candidate for dark matter?
- Difference between combustion and explosions?
- Seeing a lot of vaccine drama over an update in the CDC's contraindications for the MMR Vaccine. Why did they make the change?
- Do non-food items contain calories? How do we calculate that?
- Why don't antibiotics prevent secondary bacterial infections if taken prophylactically during a viral infection?
| Does the gut bacteria of an alcoholic differ from a non drinker? Posted: 20 Feb 2019 12:24 PM PST |
| Posted: 20 Feb 2019 08:14 PM PST |
| Why do some electronic items continue working temporarily when unplugged? Posted: 21 Feb 2019 12:57 AM PST Speakers, lights etc on some electronic items continue emitting sounds or light for a fair few seconds when they're unplugged, why? You'd assume that when you turn the power off, they would stop immediately? [link] [comments]  |
| Posted: 21 Feb 2019 04:10 AM PST I guess first off, do all/most planets with a tilted axis experience precession? And if so, is it usually in the same direction (clockwise or anticlockwise)? Edit: sorry, the word "natural" in the last question was perhaps poorly chosen. I meant "typical". [link] [comments]  |
| What Mammals become sexually mature the quickest? Posted: 20 Feb 2019 10:59 PM PST |
| Why can't we have a perfectly monochromatic light? Posted: 20 Feb 2019 09:32 AM PST In my textbook, it says that (in the context of the double slit experiment) that a perfectly monochromatic light will be ideal for the experiment, but that simply isn't possible to obtain, and a range of about 10-15 nm wavelength is used. Why can't we have an exact wavelength? Is it because of the imperfections in the way we produce the light or is it something more fundamental like the Uncertainty Principle? [link] [comments]  |
| Quantisation of space, energy, time fields. Is quantisation real? Posted: 21 Feb 2019 12:04 AM PST In this day and age, everything is quantised. Space, time, energy and fields. I find it hard to believe that they are quantised. We're taking values so small and saying that's the quantised minimum value of certain thing like there is amount of time which is the quantised value, where nothing happens. Similar with space and energy. If one divided up things so small, everything is quantised. Even fields are quantised. My question is in quantisation of space, time, energy and fields, why can't the quantised values be lower than they are? If I make the Planck's constant lower than it already is, won't the science be consistent? Is all the stuff are really quantised at those values or is it just our science and technology can only go up to this extent? [link] [comments]  |
| Do children generally aquire language at similar ages across the world? Posted: 20 Feb 2019 10:46 PM PST Obviously individual children grasp language at different rates but, on average,do children who's native language is more complex start to speak a little later than those who's native language is simpler? [link] [comments]  |
| Why did the Pascal replace the Bar as the standard unit of measurement for atmospheric pressure? Posted: 20 Feb 2019 10:24 AM PST Google was not useful; would anyone know the details? Was it simply just a naming convention in honor of Blaise Pascal or is there more to this story? [link] [comments]  |
| Posted: 20 Feb 2019 10:15 PM PST So I'm in a laboratory class for my physics major, and there's a number of things that I've not yet learned yet that would certainly help with analyzing the experiments I'm doing, namely basic quantum mechanics for the Ramsauer-Townsend experiment. I don't know much about the "particle in a box" model since I haven't actually taken quantum at my university just yet, but doing my own readings, I know that it's a very simple model, that it uses matching boundary conditions and the Schrodinger equation to draw conclusions such as how and when the Ramsauer-Townsend effect occurs, and that an actual atom will have a fuzzy nucleus that is three-dimensional which the model doesn't account for. That got me thinking about the question in the title: How to modify the "particle in a box" model to more accurately or even fully describe the interior of an atom, and not just a noble gas atom. [link] [comments]  |
| Posted: 20 Feb 2019 09:25 PM PST |
| Why are some animals who lay eggs still called mammals? Posted: 20 Feb 2019 03:07 PM PST Such as a platypus. Why aren't they classified as something else? [link] [comments]  |
| Posted: 20 Feb 2019 09:43 AM PST |
| Difference between combustion and explosions? Posted: 20 Feb 2019 01:49 PM PST So from what I understand, in the combustion chamber of a rocket the oxidizer and fuel, like LOX and H2 get sprayed in so that they react, because collision theory. However what I don't understand, is that I read in some sites that the reactions are explosions, not combustion taking place. If someone could explain this that would be great! [link] [comments]  |
| Posted: 20 Feb 2019 08:55 AM PST Here is the source: https://www.cdc.gov/vaccines/hcp/vis/vis-statements/mmr.html In early February they added the following to the list of reasons why someone should not get the vaccine.:
A lot of anti-vaccine publications are running away with this because it's so vague. Is the idea of this statement: 1) anyone with any family history of immune system problems is at risk for complications OR 2) It is a bad idea to immunize your child with MMR to avoid exposing immunocompromised family members. Anyone in the medical community have any idea why this changed? [link] [comments]  |
| Do non-food items contain calories? How do we calculate that? Posted: 20 Feb 2019 12:33 PM PST With eating disorders like PICA, or compulsive skin/hair picking disorders derived from OCD like dermatophagia or trichotillomania in which a person is compelled to bite and eat their nails, skin, hair, etc, what, if any, is the nutritional value of consuming such products? [link] [comments]  |
| Posted: 20 Feb 2019 11:43 AM PST This Mayo Clinic article quotes a doctor saying : "Taking antibiotics, which only work against bacteria and not viruses, during a cold or flu does not prevent you from developing a secondary bacterial infection and can cause serious harm." https://newsnetwork.mayoclinic.org/discussion/infectious-diseases-flu-versus-the-common-cold/ Secondary infections occur because the body is weakened by the primary infection and can't fight the spread of bacteria. Wouldn't antibiotics prevent the bacteria from getting a toehold and starting to multiply in the first place? [link] [comments]  |
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