Are there any parasites that inhabit a valuable ecological niche? |
- Are there any parasites that inhabit a valuable ecological niche?
- What are the Effects of Drinking Alcohol Before Knowing that You're Pregnant?
- About COVID rapid tests: does the colour intensity (or lack of it) have meaning?
- is a black hole necessarily a singularity (and vice versa)
- Does the reflection of light change its energy?
- Is Sagittarius A actually at the gravitational center of the galaxy?
- Why does quenching copper soften it when quenching steel hardens it?
- How do pulmonary catheters measure cardiac output?
- Does a heat engine have to have a thermal gradient to operate?
- What determines the speed of supercooled ice crystal propagation?
- Are there any estimations of what percentage of Mesozoic era species we've found?
- What is the chemical structure of polyhydroxyalkanoates ?
- What’s the next step in blackhole photography?
- If glass blocks infrared, why do greenhouses get so hot?
- What is the history of terms like mental illness, psychiatric disorder, behavioral health, mental health, etc.?
- How is it possible radio waves can potentially reach other planets years from now but I lose signal to my local radio station after driving 50 or so miles away from it?
- How do scavengers/decomposers know that you are dead? Why am I not currently decomposing?
- Do strong electromagnetic fields make it difficult for bacteria to survive?
- How fast do common bacteria move in water?
| Are there any parasites that inhabit a valuable ecological niche? Posted: 14 May 2022 01:39 AM PDT Do we need parasites? Are leeches and ticks necessary? If we eradicated botfly would another species suffer? [link] [comments] |
| What are the Effects of Drinking Alcohol Before Knowing that You're Pregnant? Posted: 13 May 2022 06:04 AM PDT I have to imagine lots of people drink alcohol before finding out that they are pregnant. Shouldn't this cause more issues with the baby's development? Isn't this the critical time for development when it could have the most effect on the baby? [link] [comments] |
| About COVID rapid tests: does the colour intensity (or lack of it) have meaning? Posted: 13 May 2022 05:27 PM PDT By intensity I'm referring to (for example) the case when the positive test stripe is very faint when compared to the control stripe. [link] [comments] |
| is a black hole necessarily a singularity (and vice versa) Posted: 13 May 2022 10:33 AM PDT My superficial knowledge of what black holes are and how they work tell me the answer to the question is yes (yes), but I'm not sure. I guess I understand that if you have a black hole, the mass must be in a singularity since, if you have gravity strong enough to bend space entirely inwards so that light can't escape, then surely there are no other forces that can resist this by pushing apart (like how atoms or neutrons push each other away) to constitute a body of some sort. So it seems that a black hole necessarily contains a singularity? Ok, then, if you have a situation where gravity is strong enough to create a singularity, is it necessarily also a black hole? Can you have a singularity so small that light can't fall into it, or something like that? I'm sort of thinking of this case where you have a neutron star, and you add one neutron at a time... is there going to be a point where I add a neutron and "pop" it's a singularity / black hole, or is there some in-between (however narrow) where you're not quite one or the other? [link] [comments] |
| Does the reflection of light change its energy? Posted: 13 May 2022 04:25 PM PDT I remember learning about how solar sails work, with it being reflective and using the momentum that light has due to its De Broglie's wavelength and using the law of conservation of momentum to increase its own momentum and hence velocity. My question here is how is the conservation of energy preserved? Does the wavelength of light increase such that the loss in the energy of the photons corresponds to the increase in kinetic energy of the sail? This is all assuming that the sail is perfectly reflective and the photons are not absorbed to become heat energy, although i'm not sure if that's a flawed assumption. [link] [comments] |
| Is Sagittarius A actually at the gravitational center of the galaxy? Posted: 13 May 2022 05:49 PM PDT Since it makes up almost none of the galaxy's total mass, I'm wondering if it occupies the exact gravitational center, or if it too orbits that point. Bonus question, since SagA revolves, is it's equator parallel to the galaxy's plane, or completely off-axis? [link] [comments] |
| Why does quenching copper soften it when quenching steel hardens it? Posted: 13 May 2022 08:40 PM PDT I have tried googling this, literally no where I could see has the answer, they just tell me ways to quench [link] [comments] |
| How do pulmonary catheters measure cardiac output? Posted: 13 May 2022 08:29 PM PDT I get how PA catheters can measure RAP, PAP, and PAOP but the text I'm reading says "the lumen near the distal tip measures changes in core temperature, which is essential for measuring cardiac output." My question is how? Thanks in advance! [link] [comments] |
| Does a heat engine have to have a thermal gradient to operate? Posted: 13 May 2022 05:00 PM PDT This thought came to me as I was thinking about photovoltaic materials. You shine a light with at least a certain frequency on a photovoltaic material. The light jostles an electron out of place. The electron then does its jiggling, and then settles back into place for another bit of light to hit it again. Pyroelectric materials (from what I'm reading) are much like piezoelectrics wherein they require constantly changing load to generate voltage. Is there a subset of pyroelectrics that behave more like photovoltaics where they allow heat to jiggle an electron that we can use, let the electron calm down, and then in that same unchanged environment absorb more heat to rejiggle the electron? [link] [comments] |
| What determines the speed of supercooled ice crystal propagation? Posted: 13 May 2022 11:50 PM PDT I just watched this video of supercooled jello freezing: https://www.reddit.com/r/blackmagicfuckery/comments/up3ik4/supercooled_jello_freezing_after_poking_it_with_a/ And it got me thinking. What determines the speed at which ice crystals propagate through a supercooled medium? Is it density? Viscosity? Temperature? Does it just vary from time to time? Any info would be appreciated! [link] [comments] |
| Are there any estimations of what percentage of Mesozoic era species we've found? Posted: 13 May 2022 10:54 AM PDT |
| What is the chemical structure of polyhydroxyalkanoates ? Posted: 13 May 2022 10:10 PM PDT Hello, I have been trying to find a base structure for polyhydroxyalkanoates, but it appears that there are over 150 different types? please help [link] [comments] |
| What’s the next step in blackhole photography? Posted: 13 May 2022 11:42 AM PDT Taking inspiration from the latest picture of Sgr A*, what else could we do or what exactly needs to be improved in order to have a much cleaner picture? Is that something doable with our current tech? [link] [comments] |
| If glass blocks infrared, why do greenhouses get so hot? Posted: 13 May 2022 04:43 AM PDT |
| Posted: 13 May 2022 07:16 AM PDT I'm hoping to be pointed to one or more lay-accessible, authoritative, well-written and thorough overviews of the history of these and related terms, including how they're defined, who coined them, when, what are the distinctions & overlaps, and why so many terms are used to refer to a domain that many of the lay public (at least in the U.S.) tend to see as basically "all the same thing". I'm NOT looking for a history of mental health treatments per se. Thank you [link] [comments] |
| Posted: 12 May 2022 02:57 PM PDT |
| How do scavengers/decomposers know that you are dead? Why am I not currently decomposing? Posted: 12 May 2022 04:28 PM PDT So this is kinda a gross and gruesome question, but it has been bugging me for a while. When we die, we decompose. This is because we are basically eaten by microorganisms, bugs, and scavengers. Like if you died on Mars, you wouldn't decompose because they don't have those organisms there. So, how do thee decomposes "know" when to start decomposing you? Cause like, as far as I am aware, my eye doesn't feel like it's rotting. The answer I came up with is that the decomposers don't "know". They constantly are eating away at us, but we just regenerate/heal at a faster rate. When we die we stop healing and therefore we decompose. If that's the case, are we constantly rotting from the moment of birth, slowly being eaten away and decomposed our entire lives? Yikes if so but i am not really sure how it could be another way. What are your thoughts? Am I on the right track? [link] [comments] |
| Do strong electromagnetic fields make it difficult for bacteria to survive? Posted: 12 May 2022 05:52 PM PDT I'm an electrical engineer and I was wondering if around high voltage lines does the presence of strong electromagnetic fields make an inhospitable environment for bacteria? [link] [comments] |
| How fast do common bacteria move in water? Posted: 12 May 2022 04:28 PM PDT Let's say I have a dirty glass and a clean reservoir of water with a tap. I want to rinse my glass with it. What is the minimum flow rate to make sure no bacteria can make it back into the clean supply? [link] [comments] |
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