| Why are Garlic and Onions Poisonous to Dogs and Cats and Not To Humans? Posted: 29 Sep 2020 01:37 AM PDT |
| AskScience AMA Series: We're misinformation and media specialists here to answer your questions about ways to effectively counter scientific misinformation. AUA! Posted: 29 Sep 2020 04:00 AM PDT Hi! We're misinformation and media specialists: I'm Emily, a UX research fellow at the Partnership on AI and First Draft studying the effects of labeling media on platforms like Facebook and Twitter. I interview people around the United States to understand their experiences engaging with images and videos on health and science topics like COVID-19. Previously, I led UX research and design for the New York Times R&D Lab's News Provenance Project. And I'm Victoria, the ethics and standards editor at First Draft, an organization that develops tools and strategies for protecting communities against harmful misinformation. My work explores ways in which journalists and other information providers can effectively slow the spread of misinformation (which, as of late, includes a great deal of coronavirus- and vaccine-related misinfo). Previously, I worked at Thomson Reuters. Keeping our information environment free from pollution - particularly on a topic as important as health - is a massive task. It requires effort from all segments of society, including platforms, media outlets, civil society organizations and the general public. To that end, we recently collaborated on a list of design principles platforms should follow when labeling misinformation in media, such as manipulated images and video. We're here to answer your questions on misinformation: manipulation tactics, risks of misinformation, media and platform moderation, and how science professionals can counter misinformation. We'll start at 1pm ET (10am PT, 17 UT), AUA! Usernames: /u/esaltz, /u/victoriakwan submitted by /u/AskScienceModerator [link] [comments] |
| Is vacuum something that is conserved or that moves from place to place? Posted: 28 Sep 2020 09:36 AM PDT Wife and I had a long, weird argument last night about how siphons work. She didn't understand at all, and I only vaguely do (imagine what that argument was like). But at the end of the debate, I was left with a new question. If I fill a cup with water in a tub, turn it upside down, and raise it out of the water, keeping the rim submerged, the water doesn't fall out of the cup. My understanding is, the water is being pulled down by gravity, but can't fall because there's nothing to take its place [edit: wrong], and it takes a lot of energy to create a vacuum, so the water is simply being held up by the cup [edit: wrong], and is exerting some kind of negative pressure on the inside of the cup (the cup itself is being pulled down by the water, but it's sturdy and doesn't move, so neither does the water). When I make a hole in the cup, air can be pulled in to take its place in the cup, so the water can fall [edit: wrong]. If I did this experiment in a vacuum, I figure something very similar would happen [edit: this paragraph is 100% wrong, the main thing I learned in the responses below]. The water would be held in the cup until I made a hole, then it would fall into the tub. If anything, the water will fall a little faster, since it doesn't need to do any work to pull air into the cup through the hole. But then it seems that the vacuum is coming in to fill the space, which sounds wrong since the vacuum isn't a thing that moves. I'm missing something in all of this, or thinking about it all the wrong way. Vacuum isn't like air, it doesn't rush in through the hole in the cup to take the place of the water, allowing the water to fall. But then why does making a hole in the cup allow the water to fall? edit: thanks all, I have really learned some things today.. but now my intuitions regarding how a siphon works have been destroyed.. need to do some studying... edit 2: really, though, how does a siphon work then? why doesn't the water on both sides of the bend fall down, creating a vacuum in-between? submitted by /u/aggasalk [link] [comments] |
| Can the brain amoeba found in Lake Jackson, Texas, and other cities, spread from a cities' water supply, to another? Can it spread person to person? Posted: 28 Sep 2020 02:18 PM PDT |
| Why have CPU clock speeds stopped going up? Posted: 28 Sep 2020 12:24 PM PDT |
| How exactly do refrigerators cool things down? And what qualifies certain chemicals as refrigerants? Posted: 29 Sep 2020 06:27 AM PDT |
| Does the Cosmic Microwave Background Radiation extend beyond the observable Universe? Posted: 29 Sep 2020 03:17 AM PDT |
| How long does it take protons in the LHC to ramp up speed? And at what rate? Posted: 28 Sep 2020 08:45 AM PDT So as far as my understanding goes, the protons are put into the smaller particle accelerator, the Proton Synchrotron Booster, in which they speed up by going around and around a few times, and then they enter Proton Synchrotron, and then the Super Proton Synchrotron, and then finally the Large Hadron Collider. So that's a lot of steps. But how does that correlate with the time it takes to ramp up speed? Is it really only seconds? Less? Or can it take hours? And does it all speed up at the same rate? I read that the protons mass is increased as they get into the near-lightspeeds, does that slow their acceleration down? And while we're on the topic, what exactly does the Proton Synchrotron and Super Proton Synchrotron do that stops the LHC from being the first exit point after acceleration in the Booster? Is it like merging traffic, where it has to gain at least near-equal speed to keep from other protons smashing into it from behind? submitted by /u/DrCorian [link] [comments] |
| If someone receives a full blood transfusion, how long does that blood contain the donor's DNA? Posted: 28 Sep 2020 09:55 PM PDT I've had this question for a long time, but unfortunately my 5th grade Science teacher didn't know.. go figure, right? Well, maybe the magic of the internet can help. If there are any other cool transfusion facts, I'm down with reading all of it. submitted by /u/Sybert777 [link] [comments] |
| Why is the alpha particle so stable? Posted: 28 Sep 2020 08:36 PM PDT |
| Are autoantibodies (antibodies that attack own cells) prevalent in people who do not have autoimmune disorders? Posted: 28 Sep 2020 08:30 PM PDT |
| How are relief maps of Greenland and Antarctica produced? Posted: 28 Sep 2020 12:08 PM PDT |
| What happens to the space that used to be occupied by an organ if that organ is removed? Posted: 28 Sep 2020 09:14 AM PDT Say if someone were to donate a kidney as a living donor. How does their body react to the newly empty space that the kidney used to occupy? submitted by /u/ssjwesker [link] [comments] |
| Why does the presentation and treatment of parkinsonism in Parkinson's Plus conditions differ from that of Parkinson's Disease? Posted: 28 Sep 2020 09:31 AM PDT The movement symptoms of Parkinson's Disease have overlap with that of Parkinson's Plus conditions, but there are differences in how the movement symptoms present. In conditions with parkinsonism, such as Dementia with Lewy Bodies, interventions for these symptoms are less effective (i.e., carbidopa-levodopa, deep brain stimulation). Is that because the underlying neuropathology of these disorders is different? How does the pathology differ? submitted by /u/floortroll [link] [comments] |
| Why are engines that use the Diesel cycle able to produce more torque than engines using the Otto cycle? Posted: 28 Sep 2020 05:07 AM PDT |
| How did things come together (Stars, planets, galaxies etc.) during the rapid expansion of the Big Bang? Were things once closer together? Is Gravitational Attraction stronger than the big bang expansion? Posted: 28 Sep 2020 08:53 AM PDT It's hard for my brain to wrap around this. With the enormous astronomical distances between space objects, how did they clump together when everything in the big bang (I assume, incorrectly maybe) was being forced a part? submitted by /u/VictoryCupcake [link] [comments] |
| If thermal dynamics wants the temperature to be at an equilibrium how come the earth still has wildly varying temperatures in diffrent areas? Posted: 28 Sep 2020 07:12 AM PDT Like I get the equator is the closest point to the sun, but why doesn't that energy spread across the globe? I mean when I heat a room from a single area it takes time to heat up the entire room but the room still heats up. submitted by /u/xXrirooXx [link] [comments] |
