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Tuesday, June 30, 2020

Could solar power be used to cool the Earth?

Could solar power be used to cool the Earth?


Could solar power be used to cool the Earth?

Posted: 30 Jun 2020 05:56 AM PDT

Probably a dumb question from a tired brain, but is there a certain (astronomical) number of solar power panels that could convert the Sun's heat energy to electrical energy enough to reduce the planet's rising temperature?

EDIT: Thanks for the responses! For clarification I know the Second Law makes it impossible to use converted electrical energy for cooling without increasing total entropic heat in the atmosphere, just wondering about the hypothetical effects behind storing that electrical energy and not using it.

submitted by /u/teddylevinson
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If I had a pound of Plutonium and put it on the ground out in the open, how far would I have to be away from it to avoid getting a lethal dose of radiation ?

Posted: 29 Jun 2020 06:26 PM PDT

Just as there’s a “sonic boom” by going faster than the speed of sound. Would something similar happen if we moved faster than the speed of light?

Posted: 30 Jun 2020 05:27 AM PDT

Where do files encrypted with password, like .rar files, store the password?

Posted: 30 Jun 2020 01:00 AM PDT

Sometimes I happen to download a .rar file protected by password, and when I view its content with software like WinRar there does not seem to be any extra file inside. How does the operating system know that the file is encrypted and what the password is?

submitted by /u/naiad_es
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How does a virus have such diverse effects on people? Some having no symptoms and other getting extremely sick or killed?

Posted: 29 Jun 2020 05:11 PM PDT

Well, how does it work? Take the current disease. There are asymptomatic carriers that never knew they had a disease. And then there are some that are going on ventilators. What makes one resin need a ventilator, and another person have no symptoms of any kind?

And it's not just this disease. The flu gave me pneumonia this year, but my wife barely had a runny nose.

submitted by /u/HuxTales
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Are modern computers considered Turing machines?

Posted: 30 Jun 2020 02:59 AM PDT

Are there any species of turtle that raise their young?

Posted: 29 Jun 2020 09:16 PM PDT

How was SARS able to enter the body?

Posted: 30 Jun 2020 05:21 AM PDT

When outside and hearing a gun shot from 100m away - do i hear the lower frequencies at the same time as the higher frequencies ?

Posted: 30 Jun 2020 01:26 AM PDT

What makes bats immune to so many viruses that they carry within them?

Posted: 30 Jun 2020 12:36 AM PDT

How exactly does and explosion or grenade kill someone?

Posted: 30 Jun 2020 02:57 AM PDT

What do viruses do if the immune system doesn't respond?

Posted: 29 Jun 2020 02:16 PM PDT

For example, the flu. Most of the symptoms (fever, cough, vomiting, etc) are caused by our immune response. Are any caused by something that the virus itself does? What would these viruses do if our immune systems just ignored them?

submitted by /u/hardward123
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Why is salt so abundant on earth?

Posted: 29 Jun 2020 03:49 PM PDT

Why is there so much salt in the oceans and underground?

submitted by /u/themanofeverywhere
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[Forensic Pathology] Is there any way of knowing whether a murder victim was raped post mortem or ante mortem?

Posted: 29 Jun 2020 07:12 AM PDT

Caspian Sea: sea or lake?

Posted: 29 Jun 2020 02:01 PM PDT

What happens to a lizard's tail once a lizard has shed it?

Posted: 29 Jun 2020 12:10 AM PDT

Everyone knows that a lizard sheds it's tail when in extreme danger. But my question is, what happens to the tail? I know it still moves after removal, and that it will keeps moving for up to 30min. But does the tail decompose, or does it remain as if it was still attatched?

submitted by /u/whatever0117
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Monday, June 29, 2020

Why are some viruses like corona or the flu one and done, while others like herpes or HIV can last your entire life?

Why are some viruses like corona or the flu one and done, while others like herpes or HIV can last your entire life?


Why are some viruses like corona or the flu one and done, while others like herpes or HIV can last your entire life?

Posted: 28 Jun 2020 02:00 PM PDT

Edit: Apparently my phrasing was a little confusing. By one and done I meant "generally" you catch the virus like flu, and it's gone from your body in a couple weeks, as opposed to HIV which lasts your life and is constantly symptomatic. I did not mean that it's impossible to catch the flu again.

submitted by /u/mettuo
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How do chemists dispose of the chemicals they make?

Posted: 28 Jun 2020 09:29 PM PDT

I always wonder after watching clips where chemists create cool chemicals, and particularly when they make poisonous/dangerous chemicals, how they dispose of it afterwards.

submitted by /u/pillowtalkingtonoone
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How exactly do contagious disease's pandemics end?

Posted: 29 Jun 2020 06:11 AM PDT

What I mean by this is that is it possible for the COVID-19 to be contained before vaccines are approved and administered, or is it impossible to contain it without a vaccine? Because once normal life resumes, wont it start to spread again?

submitted by /u/thisismyaccount2412
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If our calendar is actually 365 and 1/4 days per year then what happens to the extra quarter of a day?

Posted: 29 Jun 2020 04:31 AM PDT

I understand that after 4 years that quarter adds up to a full day which is why we have leap days to set our calendar back on track but if we get an extra almost 6 hours a year wouldn't that mean our clocks would be off by 6 hours every year? So then after 2 years midnight should be off by almost 12 hours, putting it in the middle of the day? But that doesn't happen, I've been searching for an answer for hours but nothing comes up. They just say it adds up to a day after four years but doesn't explain why we don't notice the extra 6 hours per year?

submitted by /u/Confusedscienc
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What would happen if the vacuum of space was suddenly filled with air at the same pressure as sea level? Could life on earth survive? What would happen to our atmosphere?

Posted: 28 Jun 2020 06:56 PM PDT

How does the body know to make antibodies against the other blood types?

Posted: 28 Jun 2020 01:37 PM PDT

This has been bugging me for a while.

I understand that the body will quickly make antibodies to foreign proteins when they enter the body, but there seems to be something very specific about blood type antibodies. Maybe it's because they're easily identified antigens and we're cognizant of them in day to day life. But it seems that, even if your body has never seen the other blood types, the antibodies are there and in strong enough numbers to send you into shock with the wrong blood transfusion.

Of course, this is outside of pregnancy when you can be exposed, i.e. rhesus factors.

What gives? Are there other antibodies the body creates blindly without a template? Is this template stored somewhere in the body? And is there any evolutionary advantage to this since we weren't exactly giving each other transfusions a thousand years ago?

submitted by /u/yesradius
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Are the neurological effects that are being linked to COVID-19 likely to be unique to SARS-CoV-2, or could they be common to many types of coronavirus but have gone undetected because it hasn’t been extensively researched until now?

Posted: 28 Jun 2020 09:09 PM PDT

It seems like the rate of reported neurological effects is pretty low, so is it possible that other coronaviruses could have had the same effects, but the correlation just hadn't been made yet due to less attention being paid to them? Or is it too early to speculate on that yet?

submitted by /u/MJamesRead
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Can you keep a ''stable'' orbit inside an event horizon?

Posted: 28 Jun 2020 11:43 AM PDT

Let's say a photon flies into the event horizon, it'll never be able to escape and we cannot ever see or know what's going on in there, but knowing that some event horizons are HUGE there has to be some distance between that and the singularity. So if you're coming in at the speed of light at the perfect angle what happens when the particle ''dips'' inside of the no-return point?

As we can't really get information from there do we even have theories, if so what's the most likely? I couldn't really google this well enough as I'm not even sure if the vocabulary I'm using is correct, so I hope someone with the knowledge to either answer or point me to a direction in google sees this.

Thanks in advance.

Edit: this has taught me a lot, thanks for the great answers!

submitted by /u/De3mental
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What is the difference between a mild case of COVID-19 and a severe case of COVID-19?

Posted: 28 Jun 2020 10:30 PM PDT

Does the frequency of an AC grid change as demand changes?

Posted: 28 Jun 2020 12:21 PM PDT

As the demand shifts throughout the day, what exactly happens to the AC grid in a large scale power distribution system? In my very limited understanding, I would think that if a sudden large load was applied, the frequency would drop, and the power stations would have to increase the torque on the generators in order to get the frequency back up. Is this correct? How does it all work?

submitted by /u/SF2431
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Is climate change bringing about anything that might be considered beneficial?

Posted: 28 Jun 2020 06:03 PM PDT

Historians believe the current climate change we are seeing was similar to the climate of the late middle ages. But in that context, it was considered helpful for Europeans as the climate made it easier to grow crops. Are some locations on the planet seeing similar benefits due to climate change?

submitted by /u/Rainglowpower
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Why do some clovers have four leaves?

Posted: 28 Jun 2020 03:50 AM PDT

Is it genetic – a gene that only manifests under rare circumstances? Or non-genetic – something disturbing the growth pattern?

submitted by /u/me-gustan-los-trenes
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How are biologists able to estimate the number of animals of a certain species when the number is very small?

Posted: 27 Jun 2020 07:43 PM PDT

This post says that scientists estimate that there were only 50 of the Lord Howe Island stick insect in existence in 2006. How would scientists be able to come up with such an estimate?

submitted by /u/jplank1983
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Where do seeds get all the extra matter to grow? And how does the seed transfer the matter into bark, leaves, ect?

Posted: 27 Jun 2020 11:44 PM PDT

Sunday, June 28, 2020

Besides cilantro, are there any other ingredients that have been identified to taste different to people based on their genetics?

Besides cilantro, are there any other ingredients that have been identified to taste different to people based on their genetics?


Besides cilantro, are there any other ingredients that have been identified to taste different to people based on their genetics?

Posted: 27 Jun 2020 07:10 PM PDT

Radio/wifi are specific wavelengths in the EM spectrum. So is visible light... Can we encode information into visible light the same way we do in Wifi?

Posted: 27 Jun 2020 11:50 PM PDT

i.e. Is it possible to build a super specialized router and receiver, then say, use the internet via "Orange signal".

submitted by /u/Tortugato
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What happens if someone receives a vaccination for a virus they are already infected with?

Posted: 28 Jun 2020 12:05 AM PDT

(I thought of this due to current events, but the question applies to all viruses, which is why I chose the Human Body flair)

submitted by /u/colorblind-rainbow
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Why are metallic solids typically denser than ionic solids?

Posted: 28 Jun 2020 04:28 AM PDT

Is this to do with bond length, atom size or other factors?

submitted by /u/gnarly_carvaholic
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Why do mosquitoes bite some people, but not others?

Posted: 27 Jun 2020 09:32 AM PDT

I'm just curious is it the type of blood some people or their scent? My mom and I both have always gotten bitten every time we leave the house living in Florida and my dad only gets bit maybe once a year, If that.

submitted by /u/alexisakoala
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How is the Nile the "disputed" longest river in the world along with the Amazon, can't we objectively measure them?

Posted: 27 Jun 2020 12:59 PM PDT

Wikipedia says the Nile is the disputed longest river in the world because Brazil claims the Amazon is the longest.

submitted by /u/mafternoonshyamalan
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If I cover my entire body in sunscreen, does my body still produce vitamin D when I'm outside?

Posted: 27 Jun 2020 10:29 AM PDT

How do TV/Radio stations know their monthly or daily listeners?

Posted: 27 Jun 2020 11:24 AM PDT

Not sure if my flair is correct, apologies. I understand that radio stations would broadcast their transmissions through radio waves (obviously) but how on Earth does the station know how many people are listening?

submitted by /u/Beas0
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Do dogs and cats have a “natural sleep cycle” and if so what is it?

Posted: 27 Jun 2020 09:07 AM PDT

It seems like my dog will nap all day and sleep all night if nothing is going on, but will be awake at any time something interesting is happening. And I hear about cats that act nocturnal, but cats I have had in the past seemed to mostly keep to daytime hours. Is there a normal "circadian rhythm"?

submitted by /u/ZzzzzPopPopPop
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How do we figure out what the nutritional values of our food products contain?

Posted: 27 Jun 2020 08:48 AM PDT

As title says really

submitted by /u/dajaffaman
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Any data for SARS-CoV-2 antibody titer levels needed for protection?

Posted: 27 Jun 2020 09:56 AM PDT

I realize that this is probably a resounding "no" given how so many things are still uncertain, but has there been any research on what antibody titer levels are considered to be protective against SARS-CoV-2? Or even a ballpark number?

The media and certain studies are reporting that antibody titers decrease after fighting off the infection... which is normal and expected. But how low is too low for continued protection?

submitted by /u/rabidsoggymoose
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How is expiration date for food calculated ?

Posted: 27 Jun 2020 03:41 AM PDT

Basically the title itself. Just..how?

submitted by /u/Kyllars
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Is there any species that was once native to area, left, then came back and was considered invasive?

Posted: 26 Jun 2020 09:40 PM PDT

Plant or animal? Perhaps when continents moved apart? Not sure which flair best applies.

submitted by /u/ashpatash
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Why do the gas giants in our solar system spin so much faster than the inner terrestrial planets?

Posted: 26 Jun 2020 09:39 PM PDT

Is this because they are gaseous or because they are further from the sun than the terrestrial planets?

submitted by /u/weinerdog73
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Can blood drinking animals (ticks, mosquitoes) OD from medications in your blood?

Posted: 26 Jun 2020 08:42 PM PDT

I had a deer tick nymph on me yesterday and once we removed it we realized it was attached to me but dead. We didn't kill it removing it. I had taken an opioid pain killer before bed the night before, did the tick die from the drug?

submitted by /u/GettingRidOfAuntEdna
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Saturday, June 27, 2020

Reports are coming out that SARS-CoV-2 has been detected in old sewage samples. How many people need to be infected before we can detect viruses in sewage?

Reports are coming out that SARS-CoV-2 has been detected in old sewage samples. How many people need to be infected before we can detect viruses in sewage?


Reports are coming out that SARS-CoV-2 has been detected in old sewage samples. How many people need to be infected before we can detect viruses in sewage?

Posted: 26 Jun 2020 12:05 PM PDT

The latest report says Spain has detected the virus in a sample from March 2019. Assuming the report is correct, there should have been very few infected people since it was not identified at hospitals at that time.

I guess there are two parts to the question. How much sewage sampling are countries doing, and how sensitive are the tests?

Lets assume they didn't just get lucky, and the prevalence in the population was such that we expect that they will find it.

submitted by /u/almost_useless
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How can medicines like ibuprofen and acetaminophen work on a number of (seemingly) unrelated symptoms (reducing fevers, joint pain, muscle pain, headaches, toothaches, etc.)? Do they do just one thing that affects all of these processes or do they do lots of different things at once?

Posted: 27 Jun 2020 06:49 AM PDT

If you don't experience(or experience very mild) covid-19 symptoms, does that mean the virus hasn't done much damage to your lungs/system?

Posted: 27 Jun 2020 01:35 AM PDT

Basically the title.

Out of all the covid-19 cases, most are mild or asymptomatic but does that mean that the body successfully defended itself from the virus or it just means that the virus still might've caused (irreversible?) damage but the body didn't show?

submitted by /u/Bucketlava
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Do people require acclimation for descending into the earth the same way they require it when climbing a mountain?

Posted: 27 Jun 2020 06:40 AM PDT

First, I'd like to say I'm not sure if the flair I'm using is the most accurate and appropriate for my question. I've started out with biology, but if another flair would be more appropriate please let me know and I'll change it promptly.

I've always wondered what sort of acclimation a relatively straight descent into earth would require. When I Google underground acclimation, however, I mostly hear about acclimating to the heat as you descent (which is another good thing to learn about and an important factor).

I understand that as you descend underground, you get an increase in pressure. My question: would you need to make occasional stops to adjust to the change in pressure as you go deeper underground? And an additional question, if I'm allowed: on your way up from being underground, would you need to make occasional stops for the same reason?

submitted by /u/all-out-fallout
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How often do viruses mess with the adaptive immune system?

Posted: 27 Jun 2020 03:49 AM PDT

My understanding is that essentially every virus capable of causing an infection in a human has some means of messing with the innate immune system so as not to immediately be wiped out by it. But how common is it for viruses to have non-structural proteins in their genome that are targeted at messing with the adaptive immune system?

submitted by /u/symmetry81
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How do we count the speed of Jupiter/Saturn's actual rotation, as opposed to the "wind" speed?

Posted: 27 Jun 2020 01:35 AM PDT

This applies to all gas giants as well. How can we tell the rotation of a planet if its atmosphere is opaque and also moving?

submitted by /u/SharpSpaghetti
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If it takes the earth 23hrs 56m to rotate, why dont days get offset the closer we get to the leap day?

Posted: 26 Jun 2020 11:52 AM PDT

After you recover from the flu, do you carry that flu virus with you or do you clear that flu virus?

Posted: 26 Jun 2020 03:40 PM PDT

I see lots of posts along the lines of Stonehenge MAY have been used as a solar calender. Why is this a hard question to answer? Surely it aligns closely to the movements of the sun or not? Does it have any value as an analytical tool or not?

Posted: 26 Jun 2020 02:01 PM PDT

Can we really tell apart Covid19-antibodies from other Coronavirus antibodies ?

Posted: 26 Jun 2020 04:33 PM PDT

Does genetic recombination only occur at gene boundaries?

Posted: 26 Jun 2020 07:22 PM PDT

I'm specifically interested in human cells. I know that on average 50 chiasmata form across the 23 pairs of homologous chromosomes (though rarely on #13, #14, #15, #21, #22, or #23) during meiosis, and that all of the base pairs past the point where the chiasma forms are swapped between those two chromosomes.

How the chiasmata form seems to be influenced by external factors, as evidenced by the increase in chiasmata in grasshopper cells when exposed to x-rays and high temperatures. This suggests to me that a chiasma could form at any base pair, whether or not at a gene boundary.

However, the term "genetic recombination" suggests to me that the exchanges only occur at gene boundaries. So which is it?

Note: I know almost nothing about biology, so please correct any mistakes I may have made.

submitted by /u/altayh
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How does a digital camera know it's in focus?

Posted: 26 Jun 2020 09:27 AM PDT

With digital cameras and phones they'll often auto focus, and I remember some later model 35mm cameras having the same functionality. How do the cameras know that the image is focused?

submitted by /u/Chainweasel
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What's currently the oldest living creature?

Posted: 26 Jun 2020 01:30 PM PDT

What do we know about the cores of gas giants?

Posted: 26 Jun 2020 09:40 AM PDT

How much do we know about the cores of our gas giants? How possible/plausible is it that they actually have large super earth sized rocky cores? I mean Jupiter must have gobbled up tons of asteroids through out its formation.. wouldn't the gas giant have formed around a rocky planet first?? I've read some about the "metalic hydrogen" some scientists believe is at Jupiter's core but wouldn't that even be around some type of other metallic or rocky core?

submitted by /u/Bishop120
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Why do COVID-19 models peak and decline before herd immunity numbers are reached?

Posted: 26 Jun 2020 12:45 PM PDT

Do you know why the coronavirus epidemiology models all show infections peaking in a month then going back down to zero? The models always show cumulative number of infections is substantially less than % required to achieve herd immunity. What stops the virus in August in the models?

Here's an example:

https://covid-19.public-health.uiowa.edu/

submitted by /u/I_heart_cancer
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What causes people to be left handed, or right handed or ambidextrous?

Posted: 26 Jun 2020 06:21 PM PDT

With the dominant hand, does it come from genes or biology or something else?

By that same token, why is there some things we can do equally as well with both hands -eg driving or typing - can it be taught to use the other hand as well?

submitted by /u/JeminnyCricket
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What is the longest living individual mammal?

Posted: 26 Jun 2020 01:30 PM PDT

The only thing I could find was about an average life expectancy for a species as a whole, not one individual animal. Not sure if this is science or an r/askhistorians question.

submitted by /u/BorkBorkIAmADoggo
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