Pages

Thursday, October 21, 2021

How does it make sense to mix and match vaccines?

How does it make sense to mix and match vaccines?

How does it make sense to mix and match vaccines?

Posted: 20 Oct 2021 02:51 PM PDT

I thought all the vaccines were different and some of them worked in very different ways. In that case, wouldn't mix and matching vaccines be less effective than getting two of the same? Would it even be more effective than just getting one?

So, I'm seeing a few different things being said...

One, Pfizer and Moderna are basically the same,

Two, vaccines generally all have the same end goal anyway,

Three, in theory it makes sense and the reason we weren't doing it in the first place is that all the tests were done with two of the same.

submitted by /u/CatgirlKazu
[link] [comments]

Does high-end hardware cost significantly more to make?

Posted: 21 Oct 2021 05:04 AM PDT

I work with HPCs which use CPUs with core counts significantly higher than consumer hardware. One of these systems uses AMD Zen2 7742s with 64 cores per CPU, which apparently has a recommended price of over $10k. On a per-core basis, this is substantially more than consumer CPUs, even high-end consumer CPUs.

My question is, to what extent does this increased price reflect the manufacturing/R&D costs associated with fitting so many cores (and associated caches etc.) on one chip, versus just being markup for the high performance computing market?

submitted by /u/Chlorophilia
[link] [comments]

What type of radiation does lead shielding stop?

Posted: 21 Oct 2021 03:57 AM PDT

As far as I'm aware there are only three types of ionising radiation - alpha, beta and gamma. Since alpha particles can be stopped by any sort of barrier, I'm most interested in beta and gamma radiation. Is lead shielding only able to stop one or both types?

In addition, do different types of shielding perform differently against different types of radiation. e.g. Would Osmium or Iridium work better/worse?

If I've made some glaring omission or have misunderstood something, please let me know.

submitted by /u/SunSmartCobba
[link] [comments]

Given two complete sets of DNA belonging to father and son, is it possible to distinguish which set belongs to who?

Posted: 20 Oct 2021 08:27 PM PDT

You are given two sets of DNA, and told that they belong to a father and son. You are not told which one belongs to the father and which one to the son.

Apologies if this is a basic question, haven't taken genetics since high school.

submitted by /u/doghouse_cathouse
[link] [comments]

What’s the science behind japanese oil hardener product?

Posted: 21 Oct 2021 01:11 AM PDT

I'm currently using a product from japan to dispose used oil properly. I am curious on the science behind it and have googled but i don't think it is a result of hydrogenation. I can't seem to find the ingredients of the japanese oil hardener in english so i can't really tell what made my used cooking oil solidified after putting in the powder.

submitted by /u/alleyant
[link] [comments]

What is the correlation between brain size and intelligence? Is it possible for a large-brained animal to be unintelligent or a small-brained animal to be highly intelligent?

Posted: 20 Oct 2021 08:05 PM PDT

Why do low frequency wireless communications have a low bandwidth?

Posted: 21 Oct 2021 04:28 AM PDT

I've been learning about submarines and how they use very low frequency and ultra low frequency waves on the electromagnetic spectrum to penetrate the water and communicate with submarines without them having to surface. The trouble is that the messages they receive can be received as slow as a few letters per minute. Why is it so slow? Why is the bandwidth of low frequency waves so low?

submitted by /u/SunSmartCobba
[link] [comments]

Why don't bones decompose with the rest of a dead body? Why do we end up with skeletons and fossils after decomposition?

Posted: 20 Oct 2021 08:08 PM PDT

Why does light reflect?

Posted: 20 Oct 2021 04:35 PM PDT

What causes light to bounce off of objects, instead of simply passing through the space in the atoms/molecules? Would a perfectly flat object (as perfect an object made of atoms can get) reflect light in all directions or just an inverse of the direction it came from?

edit: I think I bit off more than I can chew with this question

submitted by /u/Memerz_United
[link] [comments]

When calculating gravity related questions on a cosmic scale, do we include a component for light in transit between galaxies?

Posted: 20 Oct 2021 05:44 PM PDT

I'm assuming we do, so how much influence is it having compared to dark and baryonic matter?

submitted by /u/dontpet
[link] [comments]

Do our immune systems less able to handle common influenza viruses after months of not dealing with them?

Posted: 21 Oct 2021 01:15 AM PDT

There's a cold virus going round where I live, and the symptoms last for over a week, longer than I've ever seen. I was wondering if this is linked to the social distancing practises of lockdown, where our bodies haven't had to fight off common colds and viruses. Is that a thing? Or is this just random bad luck?

submitted by /u/deviantmoomba
[link] [comments]

When I am cutting a piece of pure iron, how deep does the cut go on the particle level? And how much energy is needed to break those bonds?

Posted: 20 Oct 2021 06:52 AM PDT

What is the difference between Frequency Division Multiplexing and Time Division Multiplexing?

Posted: 20 Oct 2021 11:45 AM PDT

How are helmets optimised for different sports?

Posted: 19 Oct 2021 11:15 PM PDT

For example like the difference between cycling, skiing Rock climbing and say equestrian helmets why are they all different when they all provide the same function? What is the physics behind head collisions in different sports?

submitted by /u/harry25ironman
[link] [comments]

Could you see Saturns rings from titan?

Posted: 19 Oct 2021 08:33 PM PDT

It is my understanding that Saturns rings while viewed from an angle are very visible, but if you were on Titan which is orbiting in the same plane as the rings would you be able to see the rings or would they be too thin to be seen at such an angle? Thanks

submitted by /u/TSL_Dad
[link] [comments]
vào lúc No comments:

Wednesday, October 20, 2021

How do hydrogen bombs work and how does the difference in design contribute to it being superior to uranium-based atomic bombs?

How do hydrogen bombs work and how does the difference in design contribute to it being superior to uranium-based atomic bombs?

How do hydrogen bombs work and how does the difference in design contribute to it being superior to uranium-based atomic bombs?

Posted: 19 Oct 2021 04:36 PM PDT

Are planetary rings always over the planet's equator?

Posted: 19 Oct 2021 09:16 AM PDT

I understand that the position relates to the cloud\disk from which planets and their rings typically form, but are there other mechanisms of ring formation that could result in their being at different latitudes or at different angles?

submitted by /u/BrStFr
[link] [comments]

The number of colours a human can distinguish is estimated to be in the range of 1e6 to 1e7, how is this range estimated?

Posted: 19 Oct 2021 11:49 PM PDT

Any citations would be helpful, thanks :)!!

submitted by /u/fool126
[link] [comments]

Why are the seatbelts on cars, buses, and airplanes different?

Posted: 19 Oct 2021 03:58 AM PDT

More specifically, why does a bus use the fiddly two point seatbelt that takes forever to adjust? It's not as secure as the three point car seatbelt, and it's not as easily adjustable and removable as a airplane seatbelt.

submitted by /u/Lithrops
[link] [comments]

Ask Anything Wednesday - Engineering, Mathematics, Computer Science

Posted: 20 Oct 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
[link] [comments]

How can you identify if an atom can make 5 or 6 bonds in a molecule?

Posted: 19 Oct 2021 10:21 PM PDT

I'm an 11th grader and I'm really confused on which atoms can make more than 4 bonds. For example in the class work there's a question that asks the structure of xenon tetrafluoride and my chemistry teacher said it can go up to 12 electrons. I understand that hybridization has something to do with it, but my teacher didn't explain it well.

submitted by /u/Coyomo
[link] [comments]

Spontaneous combustion and volatile organic compounds?

Posted: 19 Oct 2021 08:02 PM PDT

I just saw this post on a different subreddit. A guy is stepping out of a truck and the air around suddenly explodes. In the comments someone said it's vocs caused by the plastic, still not entirely sure what that is either. but If that's the case how come every time you open a shipping box nothing just explodes. https://www.reddit.com/r/blackmagicfuckery/comments/qb9lod/spontaneous_combustion/?utm_source=share&utm_medium=mweb.

submitted by /u/banana_funk
[link] [comments]

How does the iron in heme get bleached?

Posted: 19 Oct 2021 05:06 PM PDT

I'm stuck in bed and went down an extraordinarily weird rabbithole. I found this video here where this guy successfully bleaches a test tube of his blood.

How does this work? Can iron be bleached? Can anyone describe what's happening in greater detail? He doesn't really explain it in the video.

Thanks :)

submitted by /u/ShaughnDBL
[link] [comments]

As we get COVID boosters, does our imune response indicate effectiveness?

Posted: 19 Oct 2021 02:42 PM PDT

Basically the title. Ask the boosters are coming out now and people are getting them, I'll hearing from friends about how strong this response is vs the past ones. I have had friends that had a mild, then strong, then no response and others that are none, mild, strong responses. There doesn't seem to be a pattern to it (not that there has too be).

I guess the question is, does the strength of responses in relation to previous ones indicate anything about effectiveness or anti-body levels?

submitted by /u/freedompancakes
[link] [comments]

Are the COVID 3rd dose and booster shot identical?

Posted: 19 Oct 2021 03:36 PM PDT

All I can find online is a comparison of who should get which and when based on timing and medical history. I would like to know if the vaccines/shots themselves are both mRNA vaccines, are they both the same volume, if they are mRNA are the sequences identical?

submitted by /u/BenCub3d
[link] [comments]

How much mass is needed for gravity to turn something into a sphere?

Posted: 19 Oct 2021 02:00 PM PDT

Is there a lagrange point between Earth and Mars?

Posted: 18 Oct 2021 10:34 PM PDT

How can chip manufacturers like Intel, AMD, and Apple keep giving huge improvements on performance every few months by changing the architecture?

Posted: 18 Oct 2021 09:18 PM PDT

I recently saw the comparison chart for the new M1X chips which give 50% improvement over the previous generation. I'm wondering if the semiconductor size remains the same and the die size is the same as well, then how can they manage to just keep changing the architecture every so often. If the architecture change takes so little time, then why don't all companies have the same performance? Is it just the chip architecture they change or is it something else as well?

submitted by /u/DaasDaham
[link] [comments]

Some wheels have an interlaced(cross) spoke design. The spokes curve slightly around each other. Would it be stronger to weld or fasten the spokes together where they cross?

Posted: 19 Oct 2021 12:56 AM PDT

Assuming that an ideal welding itself in no way created weakness at the spot of welding.

Then the spokes could be straight instead of curved around each other at the point of crossing.

submitted by /u/LettuceBeHappy2
[link] [comments]

"Apples new M1 Max chip is its most powerful yet, with 57 billion transistors" What does that actually mean, are they physical things or countable?

Posted: 19 Oct 2021 02:13 AM PDT

How do they make these or where does this number come from? How is anyone making 57 million of anything fit on something so small.

submitted by /u/KiryusWhiteSuit
[link] [comments]
vào lúc No comments:

Tuesday, October 19, 2021

How does adding texture to a surface reduce drag?

How does adding texture to a surface reduce drag?

How does adding texture to a surface reduce drag?

Posted: 18 Oct 2021 03:43 PM PDT

I saw that Airbus is trying to mimic shark skin's denticles to decrease drag, but I don't understand how something rough creates less drag than something smooth. How does this work? Is it similar to why a golf ball has dimples?

submitted by /u/g3nerallycurious
[link] [comments]

How would I give directions to earth?

Posted: 18 Oct 2021 12:30 PM PDT

Hypothetical. I wake up on an alien space station. We can communicate fine, and I judge them to be good people, no threat to humanity. But I need to get home.

I know I'm in the Milky Way. I don't know how long I've been asleep. They know most of the galaxy by documentation of it's visable properties at minimum, but given specifics they can narrow their search.

What information could I provide them, if any, to point them back to Sol? Or are things too much in motion to use anything as a reference?

Thanks,

submitted by /u/Jhtpo
[link] [comments]

Questions about the stem cell therapy of the wilson disease?

Posted: 19 Oct 2021 05:25 AM PDT

I have a number of questions about the Stem cell therapy for the wilson disease. I tried to look into this myself, but i cant find much information about this. Any relevant sources and links would be very helpful.

1.What stem cells are used and how are they obtained?

2.Are the stem cells themselves inserted into the patient? Or are the stem cells cultured in a lab to become a certain type of specialised cell which is then inserted into the patient.

  1. Does the body have to be prepared in order to receive these cells?

  2. How are the cells inserted into the body?

  3. What stage of development is the treatment at?

  4. How effective is the method at treating the disease?

submitted by /u/Dear-Friend-8628
[link] [comments]

How is the James Webb telescope, especially its delicate foil shield, protected from space debris?

Posted: 18 Oct 2021 11:47 PM PDT

Is immunity stored in dna?

Posted: 19 Oct 2021 03:17 AM PDT

Does our dna learn how to have an immune response to a virus and store that information? Why do we need boosters, do they forget that information over time?

submitted by /u/whbdjdjehod
[link] [comments]

Is there an upper limit to the highest possible bypass ratio of a turbofan engine?

Posted: 19 Oct 2021 05:26 AM PDT

I am not an engineer and only have an rudimentary understanding of the physics behind the jet engine, especially for commercial airliners.

Admittedly, much of the physics behind why a high bypass ratio for commercial airliners is fuel efficiency was quite counter-intuitive for me, I.e slower compressor speed and more air directed to bypass duct means more thrust.

Theoretically, how far high up can the bypass ratio be reached and what new technologies can enable greater fuel savings and greater range for jet engines?

submitted by /u/RonaldYeothrowaway
[link] [comments]

What does p-value really mean?

Posted: 18 Oct 2021 12:36 PM PDT

In stimulated emission, is the photon emitted in the same direction as the initial photon?

Posted: 18 Oct 2021 08:22 AM PDT

When an atom absorbs a photon, it will absorb its momentum as well and recoil in the direction which the photon was traveling. When an atom spontaneously emits a photon it will experience a recoil in the opposite of whatever direction the photon was randomly emitted in. What about stimulated emission? Will the newly stimulated photon be emitted in the same direction as the initial photon (thus giving the atom a recoil in the opposite direction of the initial photon direction), or will the stimulated photon go in a random direction (or is there a more complicated probability distribution over which direction the stimulated photon is emitted)?

submitted by /u/timelesssmidgen
[link] [comments]

Effectiveness of Malaria Vaccine against different plasmodiums?

Posted: 18 Oct 2021 08:57 PM PDT

Exactly what the title asks. I haven't been able to find a lot of info about the efficacy of the Mosquirix (RTS, S) vaccine against different plasmodium species that cause malaria. Any Immunologists or Biologists who can answer this?

submitted by /u/Erebus_Oneiros
[link] [comments]

Why do people say that the expansion of the spacetime is accelerating if the Hubble sphere is expanding?

Posted: 17 Oct 2021 05:59 PM PDT

My understanding is this: The Hubble sphere is the distance from us at which spacetime (and the objects in it) are moving away from us at c.

Assuming that the expansion of spacetime is constant, then that distance would also be constant.

But, if the expansion of spacetime is accelerating, then the distance to space that is moving away at c would get closer to us over time, and thus the Hubble sphere would shrink.

And if the Hubble sphere is instead expanding, that means that the expansion of spacetime is actually decelerating.

But people say that the Hubble sphere is expanding AND that the expansion of spacetime is accelerating, which are completely contrary to each other.

Is my understanding incorrect? Am I missing something?

submitted by /u/danegraphics
[link] [comments]

Does common cold and flu both spread by the same mechanism?

Posted: 17 Oct 2021 06:11 PM PDT
vào lúc No comments:

Monday, October 18, 2021

Why is my pot hydrophobic where it contacts the range grill?

Why is my pot hydrophobic where it contacts the range grill?

Why is my pot hydrophobic where it contacts the range grill?

Posted: 18 Oct 2021 02:47 AM PDT

pic of the pot

pic of the range

This is the pot in the sink after being washed and rinsed. You can see the water collects in a pattern that matches that of the range. The pot is steel, I imagine the range is as well. The bottom of the pot is flat. The pot is cool.

submitted by /u/WhatisAleve
[link] [comments]

How do electrical grids manage phase balance?

Posted: 17 Oct 2021 11:25 AM PDT

In the US most residences are fed by single phase power, usually via a split-phase transformer. Somewhere upstream of this transformer, presumably at a distribution substation, that single phase is being drawn from a three phase transformer.

So what mechanism is used to maintain phase balance? Do you just make sure each phase supplies about the same amount of households and hope for the best or is it more complex than that?

submitted by /u/not_a_novel_account
[link] [comments]

What are the alternatives to use of horseshoe crab blood in vaccine production?

Posted: 18 Oct 2021 01:59 AM PDT

How long do the fissile materials in nuclear bombs remain active enough to detonate?

Posted: 17 Oct 2021 10:44 PM PDT

I just had a thought that Fallout has enough crazy people to see more bombs go off. I'm sure the electronics and infrastructure needed to deploy them will degrade much faster, but how long would it be before the fissile material in leftover weapons would deteriorate?

submitted by /u/ThePremiumSaber
[link] [comments]

Jet Engine vs Rocket Engine?

Posted: 18 Oct 2021 05:38 AM PDT

As somebody who knows next to nothing on the subject; Taking into account future technology, is it possible for a Jet Engine to breach earth's atmosphere or is a rocket engine the only possible way?

submitted by /u/SiiLE_oNe
[link] [comments]

What’s makes a gene dominant or recessive? And how does it work?

Posted: 17 Oct 2021 08:21 AM PDT

Why does the blue eye gene not show when a brown eye gene is present. Does the brown eye gene delete the blue eye gene, or does it override it, does the blue eye gene just become inactive? If it does become inactive why?

submitted by /u/Suspicious_Role5912
[link] [comments]

How long does it take for oxygen in your body to cycle?

Posted: 17 Oct 2021 06:47 AM PDT

You breathe in oxygen, it gets attached to hemoglobin, which delivers it to cells where it gets used by cells to generate ATP, producing carbon dioxide, which gets pumped out of the blood by that same hemoglobin and dumped back in the lungs. How long does this cycle take? E.g. if you were to breathe in some oxygen 17, how long would it take for it to exit your body?

Similar question in regards to water that you drink - how long does that cycle take from absorption to excretion?

submitted by /u/melmonella
[link] [comments]

Can dolphins really do arithmetic operations?

Posted: 16 Oct 2021 10:40 PM PDT

I went to a local safari park and part of the educational shows that they have there is dolphin shows where they show off what dolphins can do like how they make sounds to communicate to each other, doing flips and such. Among the tricks was they asked a member of the audience to provide an arithmetical operations (additions, subtractions, multiplications, divisions) with the limitation that the results should be 1 to 10. The trainers will then write the operation on a small blackboard, point it out to the dolphin and the dolphin will swim around and splash their horizontal fins as many times as the answer. The audience will count along with the number of splashes. There's usually two math problems presented to different dolphins. The first doplhin usually gets the answer right, while the second one fails at the first attempt then gets the correct answer at the second attempt.

So does the dolphin really read the blackboard and actually did the arithmetic operations or its actually looking/listening to other cues from the trainers?

submitted by /u/duck_duckone
[link] [comments]

What determines if two plants can be hybridized or not? e.g. can I combine an avocado tree and a strawberry plant?

Posted: 16 Oct 2021 07:54 PM PDT

How do we feel electricity?

Posted: 16 Oct 2021 03:09 PM PDT

This might be a dumb question, but the keywords involved make it hard to Google for an answer because "electrical", "shock", "nerve", and "nociceptor" connect to a lot of subjects.

So what's the mechanism for feeling an electrical shock? Humans have dedicated mechanisms for perceiving mechanical, thermal, and chemical stimuli, and presumably electrical shock is just hijacking one of those, but which one? Or all of them? Or something else?

submitted by /u/not_a_novel_account
[link] [comments]
vào lúc No comments:
Subscribe to: Posts (Atom)