Why is wifi perfectly safe and why is microwave radiation capable of heating food? | AskScience Blog

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Thursday, December 3, 2020

Why is wifi perfectly safe and why is microwave radiation capable of heating food?

Why is wifi perfectly safe and why is microwave radiation capable of heating food?


Why is wifi perfectly safe and why is microwave radiation capable of heating food?

Posted: 03 Dec 2020 05:45 AM PST

I get the whole energy of electromagnetic wave fiasco, but why are microwaves capable of heating food while their frequency is so similar to wifi(radio) waves. The energy difference between them isn't huge. Why is it that microwave ovens then heat food so efficiently? Is it because the oven uses a lot of waves?

submitted by /u/AlySalama
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Do we know of covid-19 reservoirs in wild animals yet?

Posted: 03 Dec 2020 09:00 AM PST

Knowing that Denmark had to cull their mink population because they contracted covid-19 and knowing the role of wild bird populations with regards to influenza, what do we know of similar wild animal populations that could play an important role as virus reservoirs for covid-19 in the next couple of years? Thank you very much!

submitted by /u/bowlabrown
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NASA is sending a probe to Jupiter's moon, Europa, to measure its magnetic field which allows for determining how deep and salty any oceans are but how does magnetic field measurement allow this calculation?

Posted: 03 Dec 2020 07:16 AM PST

Link to mission description below. Relevant sentence: " The mission will also carry a magnetometer to measure the strength and direction of the moon's magnetic field, which will allow scientists to determine the depth and salinity of its ocean"

https://www.jpl.nasa.gov/missions/europa-clipper/

submitted by /u/momscooking
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Do wind turbines have any measurable impact on local windspeed?

Posted: 03 Dec 2020 10:29 AM PST

Is the "Soreness" caused after a vaccine a result of the physical damage caused by the puncture, the "vaccine" itself, or a combination of the two?

Posted: 03 Dec 2020 08:59 AM PST

See title. I haven't been able to find a definite answer online from a reputable scientific source. Is the pain in the arm caused by the puncture "wound" and its healing process, or does the introduction of the vaccine and the chemicals involved contribute to the pain?

Additional question: If the answer is "puncture wound" Does the needle gauge make a difference in the amount of localized soreness?

submitted by /u/shadow9494
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Spinosaurus was roughly the same weight as Paraceratherium. However, one was endothermic while the other was exothermic. Did they have different internal temperatures, or does body heat round out at that size?

Posted: 03 Dec 2020 09:41 AM PST

Researchers working on the covid vaccine: were the volunteers tested before the vaccine for any previous exposure, the presence of antibodies, or any other signs of immunity? Are volunteers being tested continuously, or are they responsible for self reporting of symptoms?

Posted: 03 Dec 2020 07:10 AM PST

The information shared by Pfizer left me wondering.

submitted by /u/rangerwags
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How much ink does an average sized squid squirt at a time?

Posted: 03 Dec 2020 09:21 AM PST

I know, very weird question, but I have a genius plan in DnD and need to know the logistics. Thanks so much!

submitted by /u/JustyUekiTylor
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When a vaccine is 70% effective, what does that mean - are 70% of recipients protected 100% or are 100% protected 70%?

Posted: 03 Dec 2020 06:14 AM PST

Hopefully the title summarises it well, however incase it isn't - say in COVID-19 the AZ vaccine is 70% effective, what does that actually mean though:

Are 70% of people protected against 100% of exposures - and 30% get no protection, or Do 100% of people have their risk of contracting the virus at each exposure by 70%?

If it's that 30% of people have no protection - is there any way to know those who are still at risk?

This can go for all vaccines, not just COVID-19.

submitted by /u/idontlikeyonge
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How much of a bottleneck is protein folding in the drug development process?

Posted: 03 Dec 2020 10:14 AM PST

I'm a total layman but I've been really excited to read about the Alphafold breakthrough. Assuming it does what they claim it does how much time and money would this save? From my understanding starting a drug from scratch and releasing it to the general public takes about 15 years (not sure if this is accurate). How long would it take now?

submitted by /u/hugababoo
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Why can our bodies create an immune response to the rabies vaccine, but not to the virus itself if we've been exposed?

Posted: 03 Dec 2020 07:45 AM PST

I hope that phrasing makes sense. I just don't understand how the virus evades our own defenses and is pretty much 100% fatal, unless it's introduced in vaccine form. Bonus question: are there other viruses like this?

submitted by /u/cosmicdogdust
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Was/is mass distributed randomly throughout the universe, or is there some pattern?

Posted: 03 Dec 2020 11:08 AM PST

Clearly, there are forces such as gravity that cause mass to accumulate. However, I can create an algorithm that creates patterns in a data set similar to gravity, but the data provided can be random. What I'm asking is if in the big picture, did the mass in the universe (data set) get distributed randomly from the big banger, or was there some sort of order to the distribution of mass?

Also, if the initial distribution was random, did that change? I'm thinking only life can create order, but I'm also not a physics philosopher.

Honestly, I'm could use some help with the question if I'm off track. It's a but confusing to me.

submitted by /u/OverthrowYourMasters
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Can cross-sex hormones affect major histocompatibility complex molecules in humans(HLA)?

Posted: 03 Dec 2020 06:56 AM PST

I've been informed that HLA probably isn't sexually dimorphic, but I've only seen tenuous links between HLA and scent-based attraction in the papers I've seen, and it seems like the best explanation for it so far. Yet, I wonder why heterozygous HLA alleles couldn't be picked up strongly by someone if they're the wrong sex?

Also, any research related to trans people and scent would be appreciated, as well as explanations of what can affect HLA if not cross-sex hormones. Last but not least would be the best research that expands upon this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5006172/

submitted by /u/DryInstance4023
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Hallmarks of cancer - Do cancers need to achieve all (6) of the hallmarks in order to become successful (i.e. deadly to the patient), or do they only need to evolve a few, if so then which ones?

Posted: 03 Dec 2020 06:24 AM PST

If not which ones are required/the most necessary in order to be deadly?
Are some of the hallmarks more important than others (i.e. I know metastasis is essentially the death sentence ...but I know you can get cancers without metastasis

submitted by /u/Carlitoris
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Does the spin of a black hole pull objects laterally, in some cases helping them achieve orbital velocity?

Posted: 03 Dec 2020 05:08 AM PST

See title. Can the spin of a black hole help objects drawn toward it to achieve orbital velocity? Can the spin of a black hole contribute speed to an object flying by it?

submitted by /u/lunaprey
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Does everything have some level of elasticity?

Posted: 03 Dec 2020 01:43 AM PST

I'm not a science major or anything. I'm an idiot art major but last night at 3 am I had a thought. Does everything have a certain level of elasticity? I know sometimes bridges are constructed with concrete blocks with metal bars in it that are stretched so that the "elasticity" of the stretched bar can take some of the load and reduce bending. Does that mean every material can be elastic to at least an atomic level? I'm just curious. Educate me pls

submitted by /u/watermelonboat
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Is there any detectable difference between gravity and acceleration?

Posted: 02 Dec 2020 10:02 PM PST

Using only information gatherable inside in a sealed box, would there be any way to tell if one were smoothly accelerating at 1G versus being stationary on an Earth sized planet? Ignoring data originating from outside the box. In other words, is there any detectable difference between the effects of gravity versus of acceleration ("force" for lack of a better word), other than the obvious observational effects?

submitted by /u/marklein
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Will any of the SARS-CoV-2 vaccines be able to induce broad-spectrum immunity against coronaviruses?

Posted: 03 Dec 2020 09:44 AM PST

We know that SARS-1 is still lurking in the shadows. And of course there are coronaviruses that are as mild as the common cold. But the big one, MERS-CoV, has of course been speculated to be the causative agent of a future pandemic and is far deadlier than both SARS-2 and its ancestral strain. Since the vast majority of these vaccines induce an immune response against the Spike glycoprotein, how effective will they be in reducing illnesses with other coronaviruses?

submitted by /u/the___wzrd
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Could you argue that carbon monoxide (CO) contributes to the greenhouse effect?

Posted: 03 Dec 2020 02:32 AM PST

As CO does not affect the greenhouse directly but it reacts with hydroxyl (OH) radicals in the atmosphere, reducing their abundance. As OH radicals help to reduce the lifetimes of strong greenhouse gases, like methane, carbon monoxide indirectly increases the g globalobal warming potential of these gases. And could you therefore say that CO contributes to the greenhouse effect.

submitted by /u/nexxus147
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What if the difference between NK cells and T-killer cells?

Posted: 03 Dec 2020 06:12 AM PST

I am having a hard time understanding exactly what each do and what makes them different so help would be very nice :)

submitted by /u/LittleDupie
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What are the epidemiological reasons for immunizing healthcare workers before at-risk populations?

Posted: 02 Dec 2020 10:31 PM PST

"Frontline healthcare workers and elderly residents of long-term care facilities will receive the very first COVID-19 vaccinations, a Centers for Disease Control and Prevention (CDC) advisory board recommended Tuesday.

These groups will make up Phase 1A of U.S. vaccine recipients who will receive the first 40 million or so doses that could be available by the end of the year. The Food and Drug Administration (FDA) is currently reviewing two vaccines, from Pfizer-BioNTech and Moderna, for emergency use authorization." - Time

I am wondering why we're not immunizing older folks or people with pre-existing conditions first, from an epidemiological standpoint (not asking if it's moral to do so). Does the overall amount of deaths actually decrease if you immunize healthcare workers first? What are the epidemiological implications and justifications of this decision and how will it alter the trajectory of the pandemic, as compared to if we immunize the at-risk population first?

submitted by /u/DarkSkyKnight
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What percentage of stars in our night sky are actually galaxies vs actual stars?

Posted: 02 Dec 2020 09:10 PM PST

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