Why is the Ampere an SI base unit? |
- Why is the Ampere an SI base unit?
- AskScience AMA Series: We're Hayden Reeve, Steve Widergren, and Robert Pratt from Pacific Northwest National Laboratory, and we study the power grid. We recently found using a transactive energy system could save U.S. consumers over $50 billion annually on their electrical bills. Ask us anything!
- Are there any known organism that is so photophobic that they can actually die from too much exposure to common sources of light?
- How did science explain dissolution before atoms were discovered?
- If we have B-cells for every possible pathogen, why don't we have automatic immunity to everything?
- Is there a latency period for human vitamin D production upon UVB exposure, or are skin cells synthesizing vitamin D as soon as exposed? Would we get the same amount of vitamin D from 60 ten-second periods of sunlight as from a single 10 minute period of sunlight?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- When was the sonic boom first identified, or predicted?
- Will frequently donating blood lead to any negative long term effects?
- Do bugs sleep? Do they have rest periods where they recharge?
- Why is the line of gravitational lensing in NASA’s latest Hubble discovery looped?
- If there are rogue planets, does that mean there could, theoretically, be rogue solar systems?
- What exactly happens in the reaction of copper chloride and aluminium?
- What type of bond does ADP make to the F1 substructures of ATP synthase and what type of bond does the Pi make to the ADP to form ATP?
- When I recite my ABCs, am I firing neurons from my childhood? And/or am I firing the same network that dates back to my childhood?
- How did biodiversity prior to the Permian and Cretaceous extinctions compare to the biodiversity on Earth prior to Industrialization?
- How does potassium cycle in nature?
- not sure how to title this but the question is about the affects of an oxygen deficient environment on the body?
- Do individual molecules have a state of matter?
- Is ‘Wolf’s Law’ applicable to cranial suture tissue?
- What’s the purpose of a yawn?
- Do plants "sleep" at night when there's no sunlight to fuel their activities?
- How is that plastic micro particles can enter the bloodstream? Aren’t they too large?
- Is it possible to have a small localized atmosphere on "airless" bodies like moons and asteroids?
- How did social class effect chances of survival for HIV patients durring the 80'and 90's?
| Why is the Ampere an SI base unit? Posted: 30 Mar 2022 07:56 PM PDT Wouldn't it make more sense to have the Coulomb, the unit of charge, to be a base unit instead? After all, current is the flow of charge. It seems backwards to define the Coulomb as 1 A*s. [link] [comments] |
| Posted: 31 Mar 2022 04:00 AM PDT Hello Reddit, Hayden Reeve, Steve Widergren, and Robert Pratt here. Our team of energy experts study the U.S. power grid, looking at ways to modernize it and make it more stable and reliable. We're not fans of brownouts. Recently, we conducted the largest simulation of its kind to determine how a transactive energy approach would affect the grid, operators, utilities, and consumers. In a transactive energy system, the power grid, homes, commercial buildings, etc. are in constant contact. Smart devices receive a forecast of energy prices at various times of day and develop a strategy to meet consumer preferences while reducing cost and overall electricity demand. Our study concluded consumers stand to save about 15 percent on their annual electric bill and peak loads would be reduced by 9 to 15 percent. We'll be on at 2:00 PM Pacific (5 PM ET, 21:00 UT) to answer your questions. You can read our full report on our Transactive Systems website. Username: /u/PNNL [link] [comments] |
| Posted: 31 Mar 2022 07:32 AM PDT And no, I dont mean the heat that usually comes with most light source. I mean light. And by "common" I mean not something that can only be produced in a lab or in space like gamma or x-rays. I mean sunlight or a torchlight. [link] [comments] |
| How did science explain dissolution before atoms were discovered? Posted: 30 Mar 2022 08:17 PM PDT |
| If we have B-cells for every possible pathogen, why don't we have automatic immunity to everything? Posted: 30 Mar 2022 09:11 AM PDT Since we automatically have B cells that produce antibodies for every possible antigen after they pass through the thymus, why don't we automatically have memory b cells for every possible antigen? [link] [comments] |
| Posted: 30 Mar 2022 12:22 PM PDT |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 30 Mar 2022 07:00 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments] |
| When was the sonic boom first identified, or predicted? Posted: 30 Mar 2022 05:37 PM PDT Though I know things like bullwhips and canon fire create small sonic booms, as far as I can gather the noise wasn't identified for what it was at the time. Historically (as far as I can tell) the first large object to break the sound barrier and create an identifiable sonic boom as the V-2 rocket developed during WWII. My question is was the science behind the sonic boom already theorised at that point, or did the sound come as a surprise? Did they know the rocket would make a sonic boom, or was the theory being the boom developed later to explain what they heard? [link] [comments] |
| Will frequently donating blood lead to any negative long term effects? Posted: 31 Mar 2022 12:29 AM PDT I try and donate blood (plasma/platelets/red blood cells) about once a month. I am happy to donate but have a slight concern I could be putting myself at risk for something long term. I understand there are some short term side effects when donating blood, but are there any studies suggesting that frequently donating blood can negatively harm your health? [link] [comments] |
| Do bugs sleep? Do they have rest periods where they recharge? Posted: 29 Mar 2022 05:08 PM PDT |
| Why is the line of gravitational lensing in NASA’s latest Hubble discovery looped? Posted: 31 Mar 2022 12:28 AM PDT As seen on their tweet, the galaxy appears to produce a loop or whorl in its lensing line. [link] [comments] |
| If there are rogue planets, does that mean there could, theoretically, be rogue solar systems? Posted: 30 Mar 2022 09:41 PM PDT As in, solar systems hurtling through space not in the gravity well of a galaxy? Would life be affected in any way if this were a thing that existed? For instance if the Sol system were to become one of these "rogue systems", would we even notice (apart from the a drastically reduced amount of stars in the night sky I'm assuming) [link] [comments] |
| What exactly happens in the reaction of copper chloride and aluminium? Posted: 31 Mar 2022 04:26 AM PDT It is supposed to be a simple double displacement reaction with no gases released: 3CuCl2 + 2Al --> 3Cu + 2AlCl3 I've seen some videos about it and it always also releases some gas. I¨'ve tried it myself and it indeed, also releases some gas. Does anyone know what the gas is? Could it be that the aluminium chloridde immediatly decomposes because of how exothermic the reaction is and releases HCl? [link] [comments] |
| Posted: 31 Mar 2022 04:23 AM PDT Am I correct in saying ADP bonds to the F1 subsctructures using hydrogen bonds? And ADP -> ATP uses covalent bonds? Thanks in advance. [link] [comments] |
| Posted: 30 Mar 2022 10:00 AM PDT |
| Posted: 30 Mar 2022 04:39 PM PDT I'm presuming that Biodiversity generally increases as time goes on, with the occasional drop as a result of Mass Extinction events. [link] [comments] |
| How does potassium cycle in nature? Posted: 31 Mar 2022 03:33 AM PDT How does potassium cycle in nature? We know how water, carbon and some other elements do but how does potassium? How does potassium stay in nature when for example we use fern ash to make potassium hydroxide? [link] [comments] |
| Posted: 29 Mar 2022 07:02 AM PDT if a person went outside in an environment with little to no oxygen so they had a oxygen supply for breathing what effects would the oxygen deficient environment have on the body? [link] [comments] |
| Do individual molecules have a state of matter? Posted: 30 Mar 2022 09:56 PM PDT Let's say I have a container of liquefied natural gas and a container of natural gas (gaseous). If I were to remove one single molecule from each container, and keep each molecule at its respective temperature and pressure, would the individual molecule still be liquid/gaseous? [link] [comments] |
| Is ‘Wolf’s Law’ applicable to cranial suture tissue? Posted: 31 Mar 2022 12:33 AM PDT I'm sure I don't have to go too in-depth about what 'Wolf's Law' is; applied stress / pressure causes bone remodelling - increasing density and strength - hence why tennis players often have far denser bone mass in one leg. Specific cells found in bone are needed to achieve this. I was curious as to if this was applicable to the tissue that makes up cranial sutures, and if said tissue contain the same cells that would cause an increase in strength and density. If this were the case [in the assumption you aren't past the age (24-28) where the solicitation process naturally takes place], would applying pressure to the suture speed up the solidification of cranial sutures? [link] [comments] |
| Posted: 30 Mar 2022 11:20 AM PDT Is it true a yawn represents a rush of oxygen to the brain? [link] [comments] |
| Do plants "sleep" at night when there's no sunlight to fuel their activities? Posted: 29 Mar 2022 10:49 PM PDT I know they store fuel and nutrition within them, but if they are still "active" at night using those, what kinds of activities do they do? Are daytimes and summers significantly more active for plants than nighttime and winters? [link] [comments] |
| How is that plastic micro particles can enter the bloodstream? Aren’t they too large? Posted: 30 Mar 2022 04:20 AM PDT Recently researchers found micro plastics in the human bloodstream for the first time. I can understand finding plastic chemicals and compounds in blood, but aren't actual particles too big to pass? We must ingest or breath all sorts of countless fine particles daily. Yet do those pass into our bloodstream too? [link] [comments] |
| Is it possible to have a small localized atmosphere on "airless" bodies like moons and asteroids? Posted: 29 Mar 2022 06:37 PM PDT Could gas pool in a crater and have things like convection and 'wind' and primitive weather for any reasonable amount of time? I'm imagining a scenario where a comet is outgassing and some of that gas is below the Jeans Escape temperature and settles into a crater or a valley, would a constant supply of outgassing material be able to support a thin atmosphere or would it just sublimate to solid again immediately? [link] [comments] |
| How did social class effect chances of survival for HIV patients durring the 80'and 90's? Posted: 30 Mar 2022 03:19 AM PDT HIV/AIDS is often portrayed in the media as this neo-bubonic plague that could strike down anyone at any time, no matter your background. But im wondering how accurate that is. We've seen from the past couple of years how wealth can increase your odds of survival just through better palliative care. Im wondering how much wealth impacted survival chances durring the HIV crisis, even before there was any kind ofegit treatment available? Was it truely no respector of persons with little that even the rich could do to stop it? [link] [comments] |
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