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Saturday, May 8, 2021

Would dominoes collapse faster on a planet with stronger gravity than Earths?

Would dominoes collapse faster on a planet with stronger gravity than Earths?


Would dominoes collapse faster on a planet with stronger gravity than Earths?

Posted: 07 May 2021 03:35 PM PDT

In films depicting the Apollo program reentries, there’s always a reference to angle of approach. Too steep, burn up, too shallow, “skip off” the atmosphere. How does the latter work?

Posted: 08 May 2021 06:39 AM PDT

Is the craft actually "ricocheting" off of the atmosphere, or is the angle of entry just too shallow to penetrate? I feel like the films always make it seem like they'd just be shot off into space forever, but what would really happen and why? Would they actually escape earths gravity at their given velocity, or would they just have such a massive orbit that the length of the flight would outlast their remaining supplies?

submitted by /u/one-two-ten
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Would a person who beat COVID-19 be immune to future deadly/serious case of COVID-19?

Posted: 08 May 2021 03:02 AM PDT

Is there any protection from Covid-19 by "local" herd immunity?

Posted: 08 May 2021 05:33 AM PDT

Even if the US never reaches vaccination levels high enough for herd immunity is there still some level of protection gained by living in a state that might reach 80% of it's population vaccinated?

submitted by /u/SOOPASoup
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Do blue LEDs and OLEDs have to output more light to compensate for our relatively low sensitivity to blue wavelengths?

Posted: 07 May 2021 11:12 AM PDT

Preamble:

I know from my physiology courses that the human fovea has around only 2% S-type cone cells, sensitive to wavelengths ~420nm.

In Warren J. Smith's Modern Optical Engineering - The Design of Optical Systems. 3rd Edition, section 5.3 has a chart that states that, in photopic conditions, λ 420nm have a standard relative luminosity, V(λ), of 0.0040. Compare this with red λ 640nm V(λ) of 0.1750 and green λ 540nm V(λ) of 0.9540. Edit: Standard relative luminosity is also known as luminous efficacy. Useful terminology

I do not have access to ISO 11664-1:2007 or ISO/CIE 11664-1:2019 to check for more recently evaluated values for wavelength specific sensitivity.

Questions:

In photopic light conditions do blue LEDs and OLEDs have to use more power to emit the same amount of perceived light as red or green?

Is this why blue LEDs and OLEDs have a shorter lifespan than other colours?

Are the semiconductor materials/dyes for blue wavelengths inherently less durable or is their durability tied to the greater amount of light they have to emit?

submitted by /u/StereoTypo
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Since pi is irrational and it is exactly the ratio between the diameter and circumference of a circle, shouldn’t either the diameter or the circumference be irrational?

Posted: 07 May 2021 10:26 AM PDT

PI is the exact ratio between the circumference and the diameter and since it is obtained by dividing these two numbers, pi should be rational, right? But it isn't rational, pi is irrational but we know that you can't get a irrational number by dividing 2 rational numbers(cause it could then be expressed in p/q) so is the diameter or the circumference of a circle irrational?

submitted by /u/outcats1234
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Why does smaller diameter of capillary increase rise of water?

Posted: 07 May 2021 09:12 AM PDT

How do we know for sure that a species is extinct?

Posted: 07 May 2021 11:34 AM PDT

What are the criteria that must be met for these conclusions to be made? How do we not know that there aren't more of the species that we just haven't been able to find?

submitted by /u/superglueshoes
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How does blood stay in our organs? How does it feed them?

Posted: 06 May 2021 08:49 PM PDT

Perhaps my searching skills are shity but I haven't found a single sketch of how exactly are our organs and cells (skin,liver, and the like... (except for the brain, at least that one I can imagine)) are connected to the circulatory system.

I understand that my arm muscle cells need to constantly get new blood so to expel waste and receive new proteins\oxygen and etc, but how on earth is it connected to my capillaries? There are billions\trillions of sedentary cells in the human body (as opposed to cells which floats in our nutrition soup(blood)\lymph\ and etc), I doubt that each of them has its own feeding tube (blood vessel).

I could imagine how in CERTAIN organs there could be like a membrane, a sack of cells with one tube to wash all of those cells with blood so the fluid still stays within the closed circulatory system, but : a)is it true? b) how does it work with other cells (like the skin or the muscles)?

submitted by /u/Hrrmp22222
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Friday, May 7, 2021

What is the difference between a mirror and a white object?

What is the difference between a mirror and a white object?


What is the difference between a mirror and a white object?

Posted: 07 May 2021 12:06 AM PDT

So I'm taking physics and we've just finished light. One thing that struck me was that white objects and mirrors both reflect the whole color spectrum so how come a mirror and a white object look so different.

submitted by /u/harry25ironman
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Why are 75% of the earth's annular lakes north of the 49th parallel when only about 1/8 of the earth's land surface is there?

Posted: 06 May 2021 04:44 AM PDT

Wikipedia lists 32 annular lakes, of which 24 are north of the 49th parallel. Follow up question: why are 20 of them in just the three countries of Canada, Finland, and Sweden? What makes these countries more prone to annular lakes than others? Do they account for the majority of land north of the 49th?

submitted by /u/Titan_Arum
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How do non-plugin hybrid cars actually use less fuel?

Posted: 06 May 2021 06:34 PM PDT

I know that the basics of a hybrid involves using the electric motor at low speeds, and the ICE at higher speeds. And when the car is using the ICE, it charges the electric motors battery, so that it can be used again.

But how does this save fuel? A basic understanding of the first law of thermodynamics is that energy cannot be created nor destroyed, only transferred. Wouldn't this mean that the ICE would use more fuel while it is charging the electric engine, negating whatever gain it would have gotten? I feel like it would actually be counterintuitive, because the transfer isn't likely to operate at perfect efficiency.

Anyone have more insight into this?

submitted by /u/Dcarozza6
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How does my body form antibodies against the antigens of other blood types eventhough i have never been exposed to them? ( for eg how did a person with O blood group form anti-a and anti-b?)

Posted: 06 May 2021 12:01 PM PDT

AskScience AMA Series: I am Michael Abramoff, a physician scientist, and also the founder of Digital Diagnostic, that created the first ever FDA approved autonomous AI. AMA!

Posted: 07 May 2021 04:00 AM PDT

I am Michael Abramoff, a physician scientist, and also the founder of Digital Diagnostics (formerly IDx, https://dxs.ai), that created the first ever FDA approved autonomous AI. It makes a medical decision without human oversight, and was based on decades of work in neuroscience and neural networks, design of diagnostic AI algorithms, and design of validation trials, in close collaboration with US FDA. This happened in 2018, and I did an AMA here at the time here: https://www.reddit.com/r/askscience/comments/9d5id2/askscience_ama_series_im_michael_abramoff_a/

Since then, the success of Digital Diagnostics allows me to focus on the deep scientific questions around autonomous AI. What are the ethical issues and dilemmas around autonomous AI in healthcare, and how can we solve these to build an ethical foundation for autonomous AI. This framework then helps guide design, development, validation, regulation, liability issues, implementation and even reimbursement. Read more here: https://doi.org/10.1016/j.ajo.2020.02.022, and also in an the issue of the American Journal of Bioethics dedicated to our framework https://doi:10.1080/15265161.2020.1819469

Given its almost infinitely scalability, autonomous AI has the potential to do good on a massive scale. Think of improving access, solving health disparities, address health equity issues, lowering cost of care, and improving care quality, to benefit patients is tremendous. At the same time, because the large scale in which it is deployed, it also has the potential to do harm. That is why it needs to be done the right way.

And, thanks to ethical frameworks, we have come far already: inclusion in clinical standards of care, a framework for autonomous AI medical liability, a methodology for autonomous AI's reimbursement incorporating massive cost savings, and most recently a Medicare reimbursement of $55 and more. The healthcare system was built around physicians, nurses, and other human healthcare workers doing "stuff". Research studies, peer reviewed publications, FDA approval, ultimately are not enough for changing in clinical practices. So all these steps, and many more, were necessary to get the results of the science of AI to benefit patients.

Now that the technology is real, other companies also have entered the autonomous AI field, we are getting ready to start a trial for a second autonomous AI, for skin cancers, it is time to do another AMA.

I am neuroscientist who started studying neural networks to mimic brain function over 30 years ago. I am also a practicing retina specialist - a physician who specializes in ophthalmology with a fellowship in vitreoretinal surgery -; and a computer scientist, with a MS in Computer Science about artificial neural networks, and a PhD in 2001 on "AI" of medical images.

I am founder and executive chairman of Digital Diagnostics, and hence have conflicts of interest. You may also know me as one of the original developers of ImageJ, a widely used open-source image analysis app. I have published over 300 peer reviewed journal papers (h-index 66) on AI and retina, and am inventor on 17 patents and 5 patent applications in this area.

Because my statements are often under FDA, FTC, or CMS oversight and scrutiny, my answers may then seem unnaturally constrained - I will try to explain when that is the case.

I'll be in and out for a good part of the day, AMA!

Username: /u/MichaelAbramoff

submitted by /u/AskScienceModerator
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When the antibodies are created against coronavirus, or any other similar special diseases, do they stay in body for lifetime? Or would they get destroyed when not in use?

Posted: 06 May 2021 10:51 AM PDT

When to massive objects merge the gravitational waves created carry insane amounts of energy. Due the conservation of mass and energy does this mean that the black holes lost mass?

Posted: 06 May 2021 05:48 AM PDT

If we were to build a mountain or mountain like structure in the middle of Australia, how big would it need to be to create rain?

Posted: 06 May 2021 09:26 PM PDT

What is the difference between the Moon's revolution and the time it takes between New Moons?

Posted: 07 May 2021 03:54 AM PDT

The moon takes 27.3 days to make a full revolution, yet 29.5 to change from New moon to New moon? What creates the difference? The elliptical orbit? The angle of it's orbit? Please explain to me like I'm a child because I'm going to be explaining it to children!

submitted by /u/oldemajicks
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What is the difference between the J&J and AZ vaccines?

Posted: 06 May 2021 09:04 PM PDT

As far as I know, both of them are adenovirus vector vaccines. Is the difference between the two only the way they attained approval (i.e. one using 1 dose in clinical trials and the other using 2) or is there some deeper difference between them that causes any difference in practice?

Put another way, if someone receives only one dose of AZ, would they get similar protection as someone who receives the J&J vaccine?

People report getting a lot of side effects with the J&J vaccine, but comparatively fewer with AZ's first dose. Is this because of vaccine composition, or is it all unsubstantiated?

submitted by /u/GimmickNG
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Does light lose intensity when reflected?

Posted: 06 May 2021 11:53 AM PDT

If so, how does it work? If not, could it be used to make more efficient solar panels or stuff like that?

Sorry if the question is too stupid.

submitted by /u/EnvySword25
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Do insects have a sense of danger?

Posted: 06 May 2021 03:17 PM PDT

Like if a fly is almost swatted, will they avoid that location later?

submitted by /u/Ayjis
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How long do bacteria remain resistant to a drug?

Posted: 06 May 2021 08:01 AM PDT

We all know about bacteria forming resistance to treatments. Creating so called 'super bugs". But I also read somewhere that when a resistance is formed, doctors stop using the antibiotic, and without the exposure, the bacteria 'forget' how to defend against it after a while and it works again. Is ANY of that true? And how long does bacteria resistance last?

submitted by /u/quentangled8
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O-ve Blood Group & COVID-19?

Posted: 06 May 2021 12:16 PM PDT

Is it true that people with O blood group and specifically the O-ve blood group have less chance of getting the COVID-19? And if so, what is the reason behind it?

submitted by /u/Cyril_555
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Can/Do Marine Mammals Drown?

Posted: 05 May 2021 11:15 PM PDT

Pretty much the title. Is it possible for marine mammals to drown? Are there any recorded instances of drownings in the wild or in captivity?

submitted by /u/RedgrenGrumbholdtAMA
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Once the target protein/antigen is produced, do mRNA vaccines essentially act the same as a subunit/reombinant/conjugate-type vaccine, like that used for Pertussis?

Posted: 06 May 2021 08:39 AM PDT

So, vaccines like the pertussis vaccine contain a subunit of the pathogen, which the body produces an immune response to.

mRNA vaccines, like the ones currently developed to provide immunity against COVID-19, contain the mRNA that produces a modified spike protein found on the virus. Once this protein is constructed, the mRNA is destroyed.

My question: After the modified spike protein is produced and the mRNA is destroyed, is it incorrect to say that the mRNA vaccine acts just like a subunit/conjugate/recombinant type vaccine? They both involve the body responding to subunits of the target pathogen, but both simply have different methods of delivering the subunit, right?

The source that informed me and triggered me to ask this question: https://www.hhs.gov/immunization/basics/types/index.html

submitted by /u/Edawg649
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Thursday, May 6, 2021

If a person catches a cold and COVID-19 at the same time, will that person get seriously sick from both illnesses, or one of the viruses will "win" the fight against the other?

If a person catches a cold and COVID-19 at the same time, will that person get seriously sick from both illnesses, or one of the viruses will "win" the fight against the other?


If a person catches a cold and COVID-19 at the same time, will that person get seriously sick from both illnesses, or one of the viruses will "win" the fight against the other?

Posted: 05 May 2021 02:10 PM PDT

AskScience AMA Series: Hey Reddit! We are scientists working with forest and tree height data, including land cover and carbon. Many of us use a combination of satellite and ground measurements in our research with NASA and beyond. AUA about trees and how they can help us regulate climate change.

Posted: 06 May 2021 04:00 AM PDT

Trees are diverse, and tree height can tell us a lot about Earth's ecosystems. Satellites and ground-based measurements are used to track tree location, growth, monitor how well an ecosystem supports trees, and estimate how much carbon is stored by trees. GLOBE encourages the citizen scientist community to use the GLOBE Observer app to take tree height measurements with their smartphones. These observations are added to a freely available, global inventory of tree height.

Tree science experts are standing by. Ask us anything!

  • Nancy Glenn, Remote Sensing Researcher, Forest Ecosystems, Boise State University (NASA ICESat-2 Early Adopter)
  • Erika Podest, Physical Scientist, Carbon Cycle and Ecosystems Group, NASA Jet Propulsion Laboratory
  • Lola Fatoyinbo, Research Physical Scientist, Forest Ecology and Ecosystems, NASA Goddard Space Flight Center
  • Paul Montesano, Physical Researcher, Remote Sensing of Boreal Forest Structure, NASA Goddard Space Flight Center
  • Peder Nelson, Researcher and Instructor, NASA GLOBE Observer Land Cover Science Lead, Oregon State University
  • Brian Campbell, NASA Senior Earth Science Specialist, NASA GLOBE Observer Trees Science Lead, NASA Wallops Flight Facility

We'll be online from 2-3 PM ET (6-7 PM UTC) to answer your questions. See you soon!

You can download the GLOBE Observer app and start taking tree height measurements today. You can also take part in our current Community Trees Challenge now through May 15. Always follow guidelines from your local officials, and only participate in GLOBE activities or use the GLOBE Observer app if it is safe to do so.

PROOF: https://twitter.com/GLOBEProgram/status/1389610772033150977

Username: /u/nasa

submitted by /u/AskScienceModerator
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How do vaccines offer better protection/longer lasting protection than recovering from the disease itself?

Posted: 05 May 2021 11:44 AM PDT

How many cells would you need to start off 'growing' viral vectors for vaccine production?

Posted: 06 May 2021 03:47 AM PDT

Just thinking about the global need for vaccines and the challenges industry is facing in getting production of the vaccines set up. How expensive are they?

submitted by /u/dancingn1nja
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Since Covid-19 has different variants, will it be better if we get two doses of different vaccines?

Posted: 05 May 2021 09:11 AM PDT

What are the substances in Covid-19 rapid ag test?

Posted: 06 May 2021 03:30 AM PDT

We recently started taking the COVID 19 ag rapid tests (you know the ones that you put 1-2 cm into your nose and swirl around before putting them in a buffer solution and dripping them onto a test kit) at school. A couple of friends and I started wondering what the substance inside the test that produces the red control line is and what the substance producing the red line in the antigen field is. Can anyone help us out?

submitted by /u/H4ns3mand
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Do all objects really fall at the same rate, barring air resistance?

Posted: 05 May 2021 03:24 PM PDT

Falling questions:

  1. I've always been told by instructors that everything falls with the same rate of acceleration. I've always imagined that there would be variations. Assuming that the drag coefficients or shapes of two objects are the same, could mass not have an effect in a non-vacuum environment. I completely understand that in a vacuum, all objects subjected to the same gravity, and only to that force, accelerate at the same rate. However, in an atmosphere doesn't density matter? I don't know if "buoyancy" is the right word to use when speaking of air, but don't objects have different levels of it depending on how their densities compare to that of the air? For example, a balloon filled with air exhaled from the lungs eventually sinks as it is slightly denser than air but it takes a while. Would this effect not apply to all objects. I understand that it would probably be negligible but I am just wondering if it is there.
  2. I've always been told that the mass of an object falling is irrelevant to the rate of acceleration. I have seen how it works out mathematically and have always accepted this but have never completed understood why conceptually. All masses have a gravitational acceleration. When I fall to the Earth, it falls to me. Why does it not abide my body's gravitational acceleration. Instructors have always told me that no matter how massive an object is, it will always accelerate to the Earth at 9.81 m/s^2. Why. If something falls to Jupiter it accelerates at 24.79 m/s^2. If Earth falls to Jupiter, and Jupiter to Earth, which constant of acceleration is used. If my instructors were correct, Jupiter, no matter how massive will fall to the Earth at 9.81 m/s^2. How does this work?

Thanks

Edit: Realized I phrased the title incorrectly. I meant barring variations in air resistance between the objects.

submitted by /u/MrNincompoopy
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I just took a COVID 19 vaccine that is engineered using an inactive viral strain. What happens in my body next?

Posted: 06 May 2021 12:46 AM PDT

What is internal resistance? How to calculte the internal resistance of a cell/battery?

Posted: 05 May 2021 11:27 AM PDT

Statistically, when can we expect another active igneous province on earth?

Posted: 05 May 2021 12:02 PM PDT

Also, for what percentage of time, over the course of earth's history, have there been active igneous provinces?

submitted by /u/transley
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Wednesday, May 5, 2021

Could DNA have a form of primitive "password protection"?

Could DNA have a form of primitive "password protection"?


Could DNA have a form of primitive "password protection"?

Posted: 04 May 2021 06:36 PM PDT

This question is inspired by a recent post about Covid RNA and why it had a polyA tail (a long sequence of As) at the end. The answers explained that this was a way of tracking the health of the RNA and that it was required for the proteins to be expressed.

Could an organism create a unique or semi unique tail (rather than simply a long series of As), a sort of "password", and use that as a form of protection against viruses that would need to know the exact "password" to hijack the specific organism?

submitted by /u/cordialgerm
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Ask Anything Wednesday - Engineering, Mathematics, Computer Science

Posted: 05 May 2021 07:00 AM PDT

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer 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!

submitted by /u/AutoModerator
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Immune system question: how did plasma cells get their name?

Posted: 04 May 2021 06:16 PM PDT

I can find information about where they come from and the process to get to a mature plasma cells, but why are they called plasma cells?

submitted by /u/ipinotthefool
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Is the chemical composition of 1st dose and 2nd dose of the Covid-19 vaccines the same?

Posted: 05 May 2021 01:55 AM PDT

I saw a vaccination center that was administering the vaccine only to people taking their second dose. So was wondering is it because the dose 1 and dose 2 are different and they have stock of only the second dose or they are prioritizing the dose 2 as there is timeline within which it needs to be taken. I am in particular referring to the Oxford- AstraZenenca vaccine.

submitted by /u/Ay1997
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Why does it take two weeks post vaccination to create immunity? What is happening at the cellular level?

Posted: 04 May 2021 10:05 AM PDT

I've seen general answers to the question but I'm looking for a specific one. What are the cells produced after vaccination (macrophages, neutrophils, b-cells, t-cells, memory b and t cells, etc) and when are they produced? How do these cells degrade over time, and how do we retain the immunity?

I was curious about this question because we need two weeks post vaccination to develop full immunity. Why is there such a long lag time? Which of these immune cells needs the longer time in order to be produced?

submitted by /u/myomic
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*Why* do oranges or banana peppers have so much vitamin c? Like what is their function that causes some plants to need a ton while others don’t have it at all?

Posted: 04 May 2021 03:17 PM PDT

Can craters like the ones in Yamal peninsula form undersea?

Posted: 04 May 2021 10:32 PM PDT

I stumbled on a Russian video about these craters, and the scientists (on the video) concluded that many were formed in dried lakes when biogenic gas became trapped by the freezing soil, so I wondered if something similar could happen undersea (yes, I know that ocean sediments can't freeze and the pressure there is different).

submitted by /u/Mind-Willing
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Why don't batteries get drained instantly when shorted?

Posted: 04 May 2021 07:26 PM PDT

Hi, I am starting to learn some electrical science and there is one thing that is confusing me. Each battery is rated for a limited amount of current hours (more geerally watt hours but the voltage stays constant so it doesn't really matter). The resistance of a short length of wire is incredibly small. This then means that the current will also be extremely high, since current is voltage over resistance. What I don't understand is why the battery doesn't instantly die when shorted. At first, I thought it was internal resistance, so I meassured the current through the contacts of a nine volt and got a value around 1 microamp. In my mind this would mean that the internal resistance is massive and the battery should be dead, but I put an LED on it and it lights. Am I measuring the current wrong? What prevents batteries from instantly draining when shorted?

submitted by /u/hardmemer069
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What is the difference between strain, mutation and variants? E.g. D614G vs B1.1.7

Posted: 05 May 2021 01:19 AM PDT

Why have we sent so many probes to Mars, yet Venus gets none?

Posted: 04 May 2021 05:42 PM PDT

Why do we send so many probes to Mars, yet Venus gets none? I think that Venus has alot to teach us about our own planet. Sure Mars is a better target if we want to have a permanent presence on a planet(s surface). Venus has a large and complex atmosphere that warrants more investigation.

submitted by /u/roger_ramjett
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Did we know the temperature of space before we went there? How?

Posted: 04 May 2021 05:51 PM PDT

I just learned that space is 2.7 Kelvin (-255 degrees Fahrenheit). If this is true, did we know this before we visited it? How? If we didn't know, how did we survive that temperature?

submitted by /u/passive-thoughts
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Is the eye development process conserved across invertebrates and vertebrates?

Posted: 04 May 2021 06:23 PM PDT

For example, is the process similar enough between xenopus and drosophila to connect them in a project?

submitted by /u/fatgirlvibes
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How is the COVID mRNA vaccines made because COVID is a RNA virus? Specific question about the plasmids used for cloning?

Posted: 04 May 2021 09:30 PM PDT

Hi,

To my understanding, the way we produce mRNA vaccines is through a plasmid, yeah? We take a piece of DNA, insert it into a plasmid, and then into a bacteria for reproduction of that genetic material. But the thing is, this is specific to COVID, but isn't COVID a RNA virus? Would there be some sort of reverse transcription reaction going on with the original RNA to make cDNA, and perhaps that cDNA is replicated again and again through bacteria?

Hope that made sense. Thanks in advance.

submitted by /u/geneticsnerd11
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How (and why) can potential energy be negative (and what does that mean) in a potential curve of molecular interaction?

Posted: 05 May 2021 12:26 AM PDT

Why can a 2 Gs/s oscilloscope only measure to 200 MHz?

Posted: 04 May 2021 12:45 PM PDT

I noticed one of the oscilloscopes at work was rated for a maximum sampling rate of 2 Gs/s, but a maximum frequency of 200 MHz. According to the Nyquist theorem, shouldn't it be able to handle up to 1 GHz?

submitted by /u/Soloandthewookiee
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Is there a blood test to determine if you're allergic to Covid vaccines?

Posted: 04 May 2021 09:41 PM PDT

I've read that doctors can administer a topical test but I have a coworker who claimed his doctor gave him a blood test that indicated that we was more likely to have a reaction. Not sure if this is a thing. Also not sure which vaccine it indicated he would have a vaccine to supposedly. He also told me he previously went into anaphylaxis from a flu vaccine which would be the reason why his doctor gave him the test.

submitted by /u/Westerbergs_Smokes
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Are decreasing number of sun spots somehow connected to the ongoing pandemic?

Posted: 04 May 2021 10:18 PM PDT

I read an article in my national news paper that the "sun spots" have been decreasing in number for the last 50 years. And that weaker magnetic field is somehow causally related to the pandemics. And that 21st centuary will be known as the Centuary of Pandemics.

How much of this is true? And how can magnetic field be causal of a viral outbreak?

submitted by /u/tropicaljuiceofsoul
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