Where in an atom exactly is a nucleus located? Is it in the centre or does its location vary from time to time? |
- Where in an atom exactly is a nucleus located? Is it in the centre or does its location vary from time to time?
- Why are whales so much bigger than other animals?
- There is a lot of talks recently about herd immunity. However, I read that smallpox just killed 400'000 people/year before the vaccine, even with strategies like inoculation. Why natural herd immunity didn' work? Why would the novel coronavirus be any different?
- Does recovering from COVID-19 give less or more resistance than a theoretical vaccine would?
- The latest "Kurzgesagt" video starts with: "The sun, round and smooth and peaceful." How smooth is the sun?
- Why doesn't malaria spread from endemic to non-endemic regions of the world?
- Did the US have significant hosptial strain that led to additional deaths during the Covid crisis?
- What does "discovering an antibody" imply?
- Almost everyone knows having excess body fat is harmful to our health since it leads to obesity and a myriad of other conditions. But does having too little body fat (both subcutaneous and visceral) negatively impact our health as well?
- How exactly do astronomers calculate the trajectory of an asteroid as it comes close to Earth?
- When you get a nose bleed, where is the blood coming from?
- If I had a light source that only put out 540 no radiation (green light) and no other radiation would focusing that light produce heat on a target?
- When you inhale dust/ dirt/ pollution, does it stay in your lungs? And if so, does your lung clean itself?
| Posted: 07 Jun 2020 06:16 AM PDT |
| Why are whales so much bigger than other animals? Posted: 07 Jun 2020 06:35 AM PDT I'm watching a documentary and although I knew they're bigger, I'm not sure why they're so much bigger and how they can be sustained as animals whereas other bigger animals couldn't. Also why do they mainly feed on something so small e.g. crill [link] [comments]  |
| Posted: 06 Jun 2020 09:24 AM PDT |
| Does recovering from COVID-19 give less or more resistance than a theoretical vaccine would? Posted: 06 Jun 2020 11:01 PM PDT To my understanding, it is unclear exactly how much immunity being infected with COVID-19 and recovering gives you. I'm always seeing warnings that even if you get sick, have symptoms, and receive a positive test, you should not assume you are immune after recovery, and should still take the same precautions as everyone else. And there are confirmed cases of people getting it more than once. This being the case, what does this say about the efficacy of a vaccine? If it turns out that full-on bedridden infection doesn't provide you with much or any protection, would a vaccine do any better? [link] [comments]  |
| Posted: 07 Jun 2020 07:17 AM PDT I've seen comparisons between the silicone kg and the earth, if either were shrunk or blown up to the others size, but never about the sun. Is it smooth? Is it's surface relatively even (like the seas)? [link] [comments]  |
| Why doesn't malaria spread from endemic to non-endemic regions of the world? Posted: 06 Jun 2020 01:31 PM PDT Malaria is transmitted through mosquitos. If an infected mosquito bites a person, then that person gets malaria. If another mosquito bites that person post-infection, then the mosquito gets the parasite and can spread it to other people. Here's what I don't get: millions of people in the Western world (and in other areas that don't have malaria) travel to sub-Saharan Africa and other endemic regions every year. Surely there'd be at least a few cases a year of somebody getting infected, going back home (e.g. to a country like Canada) before developing symptoms, other mosquitos (in Canada) biting that person, and then those mosquitos spreading it around the population. Why does this never happen? I feel like I'm missing something fundamental, but I don't know what. Thanks! [link] [comments]  |
| Did the US have significant hosptial strain that led to additional deaths during the Covid crisis? Posted: 07 Jun 2020 12:09 AM PDT Tonight I was at a dinner and someone said there was never any real strain on hospitals in the US during the worst of the crisis, that deaths were solely the result of Covid symptoms, and that hospitals' lack of supplies or strain never caused an increase in deaths. I was pretty certain this wasn't true but didn't have any hard evidence. All I could really remember (after drinks) were qualitative headlines citing strain, videos of stressed out doctors in NY, and the ubiquitous bell curve graphs showing hospital strain in rapid onset epidemic scenarios. I was pretty sure that people had died without proper treatment and lack of ventilators, etc., but the individual kept stating "we had beds for everyone, it was never an issue here. Italy maybe, but the US always had enough beds and supplies." Just wanted to get some additonal facts on this. I appreciate any insight. Thanks in advance. [link] [comments]  |
| What does "discovering an antibody" imply? Posted: 07 Jun 2020 01:19 AM PDT With the covid-19 epidemic going on, there is a lot of talk about "discovering" or "finding" antibodies. Could anyone shed a little light on exactly what this implies, for someone with little biology knowledge? What I gather is happening, is that some people, or even animals, produce particular peptides/proteins that has a tendency to bind to the virus particles, thus stopping the virus from entering cells. But that is very vague, and I have some particular questions around this:
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| Posted: 06 Jun 2020 08:56 AM PDT |
| How exactly do astronomers calculate the trajectory of an asteroid as it comes close to Earth? Posted: 06 Jun 2020 06:20 PM PDT In just short of a couple of hours, Asteroid 2002 NN4 will come close to Earth (approx. 5M kilometers). How do they predict the exact distance? What if they're a little off and the asteroid actually does make contact with Earth? I'm a bit of a worry-wort, so forgive me if I sound a bit skeptical. I just want the facts from a professional. [link] [comments]  |
| When you get a nose bleed, where is the blood coming from? Posted: 06 Jun 2020 06:13 PM PDT |
| Posted: 06 Jun 2020 10:07 AM PDT I had this question because infrared is commonly thought of as heat by laypeople and wanted to know if that was a feature across all radiation or just longer wavelengths. [link] [comments]  |
| Posted: 05 Jun 2020 07:34 PM PDT |
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