Pages

Saturday, January 16, 2021

What does the data for covid show regarding transmittablity outdoors as opposed to indoors?

What does the data for covid show regarding transmittablity outdoors as opposed to indoors?

What does the data for covid show regarding transmittablity outdoors as opposed to indoors?

Posted: 15 Jan 2021 04:31 PM PST

How was the first magnet created? How would I create a magnet in absence of electricity or other strong magnets?

Posted: 16 Jan 2021 03:59 AM PST

For example, lets say I've been thrown back in time to 1000 BC. I want to introduce civilization to the wonders of electricity, so the first thing I need is a strong magnet. The only sources of ferromagnetic material I know of are Lodestones, which I understand are only quite weakly magnetic.

So it got me to thinking...once you have a strong magnet, and once you can create electricity, creating more magnets is significantly easier. But how were the first strong magnets created?

There's surprisingly little written about how to make a magnet in lieu of other magnets

Or, put another way, if you got thrown back in time how would you go about generating electricity for your deLorean?

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

Is muscle pain after vaccination, caused by the immune system’s reaction to it, or because the muscle was cut a little with the needle?

Posted: 15 Jan 2021 02:09 PM PST

For example if someone got a vaccine in one arm and just stabbed with a needle in the other, would both arms feel the same?

What if the non vaccine arm was injected with saline but no vaccine ?

submitted by /u/gilbertopr16
[link] [comments]

Do animals experience epidemics? If so, how do they handle it?

Posted: 15 Jan 2021 01:25 PM PST

I understand humans have epidemics and pandemics, and we're in one right now. I would assume animals do experience some sort of similar thing. However, do these disease outbreaks have major effects on the populations? Have there ever been any species wiped out by disease? And do any animals have certain precautions dealing with disease?

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

How are the expiration dates for foods determined?

Posted: 15 Jan 2021 03:27 PM PST

I've been paying more attention to expiration dates and I've always been curious what the research is behind certain dates.

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

How is the flu shot updated? How do scientists know how the flu is mutating for the next year?

Posted: 15 Jan 2021 09:21 AM PST

The Flu Jab is a yearly vaccine to stave off Flu from those that are most vulnerable, as well as to others to help reduce the spread. It's a yearly shot as the flu strain changes quite quickly. But how do we know how its mutated in time to get the vaccine approved and distributed?

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

Why are sonogram images that weird wedge shape?

Posted: 15 Jan 2021 08:46 AM PST

Can you test for previous COVID-19 exposure?

Posted: 15 Jan 2021 04:11 PM PST

Is there a way to test to see if you've previously been COVID positive, but you didn't know at the time because you were asymptomatic?

​

Thanks!

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

The CMB has a peak energy of 0.0006626 eV when it reaches us after redshifting for about 14 billion years. What's the initial energy of such a photon, almost 14 billion years ago?

Posted: 15 Jan 2021 03:28 PM PST

Early news about the new Covid variants suggested that they have about the same virulence as the original. Is there any new data on the virulence of these variants?

Posted: 15 Jan 2021 03:14 PM PST

Why do we get the feeling like we're falling and jolt when we're trying to sleep?

Posted: 15 Jan 2021 12:50 AM PST

Are stars that are visible from Earth a lie?

Posted: 15 Jan 2021 11:09 AM PST

This question came to my mind while I was looking at the night sky and thinking that the stars are light-years away from us. Don't most stars that we "see" die out before their light can reach Earth?

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

Do everyone have a wisdom teeth? If so what happens to those who can't afford to have a surgery? Is it always necessary to remove a person's wisdom teeth?

Posted: 14 Jan 2021 09:22 PM PST
vào lúc No comments:

Friday, January 15, 2021

About how many gallons of water is evaporated on average per day in one square mile of the ocean?

About how many gallons of water is evaporated on average per day in one square mile of the ocean?

About how many gallons of water is evaporated on average per day in one square mile of the ocean?

Posted: 14 Jan 2021 02:52 PM PST

Edit: Disregard the imperial units, force of habit. (am in America) Please use metric.

submitted by /u/0gammaray0
[link] [comments]

A team from the WHO is currently in China looking for the origins of SARS-CoV-2. How do you look for the source of a virus?

Posted: 14 Jan 2021 05:49 PM PST

Where and how is energy stored in the body?

Posted: 15 Jan 2021 05:03 AM PST

And an optional follow-up question - we have days when we feel focused and energetic and can take on a variety of different tasks, both physical and mental, throughout the day but we also have days when we feel like we can't get out of bed. What causes this and why do we sometimes "wake up" after a cup of coffee or an energy drink? Is energy something specifically definable and do we expend the same energy capacity for both physical and mental tasks?

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

What determines when a viral infection is no longer contagious?

Posted: 15 Jan 2021 05:16 AM PST

Covid-19 patients can test positive for up to months after being infected but the CDC guidelines state that the virus is most likely not contagious after 10 days. How is someone who still has detectable amounts of covid-19 in their nose or saliva no longer able to pass it on to someone else?

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

What makes one type of steel mechanically stronger than another?

Posted: 15 Jan 2021 04:07 AM PST

Can someone still have negative, long lasting effects from Covid-19 if they were asymptomatic?

Posted: 14 Jan 2021 03:13 PM PST

Special relativity from multiple simultaneous perspectives?

Posted: 14 Jan 2021 11:44 PM PST

My understanding: Due to special relativity, if one atomic clock is on a space-craft moving very quickly (closer to the speed of light I suppose), and another atomic clock is on the planet standing still, the time on both of them will appear different.

My question: How does this reconcile with multiple points of view of the same phenomenon? For example, if there are three points of perspective, A, B, and C. If each point of perspective watches the space-craft travel from a different vantage point, and then they all compare their notes to the actual data on the atomic clock from the space-craft, what will happen? Assume perspective A is at a fixed point behind the space-craft, perspective B is at a fixed point in front of the space-craft, and perspective C is at a fixed point to the side of the space craft. Once the space-craft is done traveling, wouldn't they all have different experiences due to the space-craft moving in different directions relative to the direction/speed of light? Due to the varied viewing angles, the light should behave differently and have a slightly different perceived speed from each vantage point, shouldn't it? For example, wouldn't the clock on the space-craft be faster than the clock at one vantage point, but slower than another? Yet if all the three vantage points were fixed relative to each other, how could they reconcile their data?

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

Are the same type of cells found in humans relatively the same size across all humans, or do they vary in size? Similarly, are the same type of cells the same size across species, and other animals, e.g. is a liver cell in a dog the same size as a liver cell in a cat?

Posted: 14 Jan 2021 07:10 PM PST

Could the technology behind mRNA vaccines be used to combat cancer?

Posted: 14 Jan 2021 05:49 PM PST

For example, could they put mRNA instructions for apoptotic proteins or other inhibitory/interference proteins to a cancer cell's pathways in order to fight it from the inside out? I'd imagine this could either be injected directly into the tumor or the nanoparticle could be modified to have antibodies or other small molecules with high affinity for cancer specific receptors? This would circumvent some cancer's ability to use efflux pumps to export chemotherapeutics from the cell.

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

What happens to competing virus variants in a given area?

Posted: 15 Jan 2021 03:57 AM PST

So I'm not sure exactly how to word the question, so sorry in advance.

We keep hearing about new variants if the Covid virus (the UK, South Africa and Brazilian variants).

They are all reportedly more transmissible and are becoming the dominant variant in the areas they were discivered.

What happens if there is an equal prevalence of each variant in a given area? Do they mutate further to try and gain dominance? What governs that?

Finally is there any benefits or negatives to the human population in those areas (having a virus compete for dominance)?

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

What is the oil our skin makes?

Posted: 14 Jan 2021 06:52 PM PST

Not necessarily sebum, pimples/blackheads, or sweat produced from sweat glands. I've heard "if you pop a pimple, your face produces oil to help protect itself". I guess I just mean the lubricant your body makes. What is human oil, and what is it made out of?

submitted by /u/Danny776
[link] [comments]

How do axolotles breathe?

Posted: 14 Jan 2021 12:14 PM PST

I know that the spikes on their face are like gills, but I was wondering more about how that works in comparison to a mammalian respiratory system?

submitted by /u/irishguacamolethe3rd
[link] [comments]

How do scientists know how continents emerged and collided in the pasts Eons and Eras?

Posted: 14 Jan 2021 10:08 AM PST

I was watching this video about the the history of the earth and the continental drift and I was wondering "How do scientists know?" I mean, during the Archean Eon there are a bunch of tiny islands floating. What are the clues that they really existed?

Or in Pangea, how do they know that India was part of africa, moved in a specific way to then collide with Asia?

How is this studied?

My guess is that they study mineral core samples and then can see when that place was underwater or above X millions years ago, or if the mineral composition matches another place's it may indicates that those where united in the past. What are other tools used to study this?

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

Is liquid water wet?

Posted: 14 Jan 2021 04:49 PM PST

I know it sounds like a stupid question but I've gotten mixed responses on this.

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

How do scientists measure the inclinatiom of a planet?

Posted: 14 Jan 2021 05:39 PM PST

I was browsing on reddit and saw a gif of the rotation of the planets. In the gif for every planet every angle of inclination of each planet was written there (for the earth 23° for example). What reference points do scientists use to determine which part is supposed to be on top or to measure how much the planet is lnclined. Does it have to do with the magnetic field each planet has? Or do other planets even have a magnetic field like earth has?

submitted by /u/mussi8
[link] [comments]

Can SARS-Cov-2 recombine with other coronaviruses in humans?

Posted: 14 Jan 2021 10:10 PM PST

Other coronaviruses are well known for recombination events, how about COVID-19?

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

Do cells that have been hijacked by a virus skip transcription?

Posted: 14 Jan 2021 07:28 AM PST

I'm a little confused as I can't find out any information on this - when a cell forms a protein it goes through transcription and translation, in transcription the DNA is converted into RNA - I thought that when all viruses hijack a cell they use reverse transcriptase to convert their RNA into DNA, but this only happens in retroviruses. Do normal viruses remain as RNA when they enter a cell? And if they do, surely they wouldn't need to undergo the transcription stage as their genetic material is already in the correct form for it to go straight onto translation right?

submitted by /u/0YGIZG991
[link] [comments]

Do mating animals know that they mate to produce offspring?

Posted: 14 Jan 2021 02:32 AM PST

What happens if an electron in an atom's electron shell is measured and it is inside the nucleus? Do they interact with the nucleus in any way?

Posted: 14 Jan 2021 03:53 AM PST

Why does sugar solution goes into a plant cell when plant cell is plasmolysed?

Posted: 14 Jan 2021 07:21 AM PST

Can lightning strike above the clouds?

Posted: 14 Jan 2021 12:55 AM PST

I'm wondering if I built a pole tall enough to go above the clouds and there was lightning. Would the lightning go above the clouds and reach the top or would it go down mid pole. Also, if it can't strike above can it strike sideways if possible? One of those shower thoughts.

submitted by /u/Pizzachris6
[link] [comments]
vào lúc No comments:

Thursday, January 14, 2021

Do animals that sleep in multiple short "naps" (such as cats) require REM sleep the way humans do?

Do animals that sleep in multiple short "naps" (such as cats) require REM sleep the way humans do?

Do animals that sleep in multiple short "naps" (such as cats) require REM sleep the way humans do?

Posted: 13 Jan 2021 10:26 PM PST

Is sound, bound by gravity? Is screaming upwards any different than sceaming downwards, speed or volume-wise?

Posted: 13 Jan 2021 02:15 PM PST

Are more contagious viruses less fatal/dangerous? If so, why?

Posted: 14 Jan 2021 06:18 AM PST

When pain tolerance is plotted on a graph what type of growth pattern does it tend to follow?

Posted: 13 Jan 2021 08:11 PM PST

Have there been any studies where painful stimuli is increased and the people tested update their perceived level of pain? I'm familiar with the experiment where people put their hand in cold water and the duration they can withstand is timed, but that experiment doesn't increase the intensity of the stimulus because the water temperature stays constant or slightly warms over time.

Have there been any experiments where an electrical current is applied, people report how much pain they feel, then a stronger electrical current is applied and the new level of subjective pain is reported? If so, what does the graph of electrical current to reported pain look like? Does this vary among different population groups?

I'm especially curious about the growth of the graph (i.e. linear, exponential, logarithmic). I'm also curious if there are people with low pain thresholds who also have high pain tolerance. For example, they might have a graph like y = 0.1x while someone with high pain threshold but low pain tolerance might have a graph like y = -5 + 3x.

Also, do different sources of pain change reported experience of pain? For example, do some people have a higher resistance to heat induced pain than electrical induced pain? Are there any patterns among which types of groups are most resistant to which types of pains? I've read that runners tend to have higher pain tolerance, but I'm wondering if this has been analysed by source of pain. For example, maybe people from cold climates have a higher tolerance to cold stimuli? Or people from areas with many mosquitoes have a higher tolerance to mosquito bites? If so, when a person from a cold climate moves to a hot climate does their tolerance to cold stimuli change?

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

What makes a voice unique?

Posted: 13 Jan 2021 03:49 PM PST

Pitch is just the vibration of vocal chords at a certain speed to generate a certain wavelength right? So why do two people singing at the same pitch sound different?

P.S. not sure if I used the right flair because I'm not sure what impacts it, sorry 😅

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

What are the raw materials for mRNA vaccines and where do they come from?

Posted: 13 Jan 2021 12:25 PM PST

I have some understanding of how the COVID-19 vaccine was designed and works thanks to this article. It talks about using a DNA printer to create the molecule. Further research told me that bulk manufacturing uses "bioreactors".

But what are the actual raw materials and where are they obtained from? I got some vague answers of "enzymes" and "polymerases" from a lot of searching. What are the actual raw materials and where are they obtained from?

I am looking for answers on the lines of -> it uses "x" which is obtained by refining soy protein, "y" which is obtained from fractional distillation of crude oil, and "z" by fermenting cat pee etc. Where do the chemicals used in the bioreactor/DNA printer come from?

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

Is there any issue with having a variety of Covid-19 vaccines out there?

Posted: 13 Jan 2021 05:10 PM PST

It just seems that most developed country have three vaccines approved for usage now, and likely at least one more will be approved shortly.

Is there any issue rolling out a bunch of difference vaccines to combat one virus?

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

Is the universe flat or 3D? Basically, as the universe is expanding, is it going in all directions or just in one plane?

Posted: 13 Jan 2021 08:47 PM PST

What makes the new Coronavirus-mutation from UK and South-Africa more contagious?

Posted: 13 Jan 2021 11:54 AM PST

Do other mammals have an umbilical cord, and if so, how is it cut?

Posted: 13 Jan 2021 08:29 AM PST

How would a meteorologist calculate or estimate the TOTAL amount of precipitation that falls in an area/state/country?

Posted: 13 Jan 2021 05:18 PM PST

If you look up the rainiest states in the U.S. for instance it goes by average precipitation. It says 22 inches of precipitation fell in California, which is obviously some kind of average. What's the TOTAL amount of rain/snow that fell in California? Surely it would be much more than a smaller state like Hawaii, which is listed as the rainiest place in the U.S..

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

How do then figure out that more then one doses of a vaccine will make a person immune when testing a vaccine?

Posted: 13 Jan 2021 01:05 PM PST

I mean if the first doses doesn't work what makes them believe more doses will?

submitted by /u/kingofstars1
[link] [comments]

Why does the lack of smell impairs the sense of taste?

Posted: 13 Jan 2021 03:26 AM PST

why do vaccines need to be put in a vial?

Posted: 13 Jan 2021 10:34 AM PST

can they not just deliver it in big jugs with self adhessive cap where syringe needles can be inserted to extract some. that way you need less resources to make the vials and can deliver larger quantities

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

How does the new covid mRNA vaccines avoid destruction by siRNA or microRNA?

Posted: 13 Jan 2021 04:28 AM PST

Hey everyone, I am a medical student and recently we learned about siRNA and microRNA and how they silence mRNA transcription and helps degrade them. So i was wondering how the new covid_19 mRNA vaccines are able to bypass this system. And whether or not this can be a form of resistance to the new vaccines?

submitted by /u/Drpaper123
[link] [comments]

Why does hot asphalt look reflective at low angles?

Posted: 12 Jan 2021 09:56 PM PST
vào lúc No comments:
Subscribe to: Posts (Atom)