What causes the mushroom cloud effect in a nuclear bomb? |
- What causes the mushroom cloud effect in a nuclear bomb?
- Can a atom be made of just a neutron and an electron?
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- How was it known from the LIGO experiments that the blackholes are spinning?
- Why do plant's rings tend to orbit with the equator?
- Why do some places have two high and two low tides a day, and other places have only one?
- A wasp has been visiting my room for the last 3 days entering a coke can flying away and coming back. What exactly is s/he doing?
- Video game "optics" - Why does 90 FOV look so weird?
- Why is Greenland covered by an ice sheet while other areas of similar latitude such as northern Scandinavia are not?
- How does long exposure on a DSLR camera work?
- Are any mammals as sexually dimorphic as humans?
- Is individual sperm size relative to organism size?
- Is there any indication that natural selection has had an impact on the behavior of animals affected by road accidents?
- Are there any genetic traces found within North American Aboriginal people from the Vikings who settled in North America a thousand years ago?
- Does taking NSAIDs for menstrual nausea/pain affect how effectively the uterus sheds/eliminates its lining?
- How did ancient mathematicians develop so much geometrical theory without access to things like precision measuring instruments, cheap writing materials, and high-quality straightedges?
- Why are caterpillar nests in specific trees?
- While THC is still "in your system", how much, if at all, are you still under its effects?
- What is the full chemical process when tea is brewed with tea leaves, a pot and a kettle?
- Since light from a source will travel in all directions and bounces all over the place, how do our eyes know where it came from?
- How do swept wings reduce wave drag?
- Is there any scenario where the speed of sound is close to/at the speed of light?
| What causes the mushroom cloud effect in a nuclear bomb? Posted: 09 Aug 2016 07:13 AM PDT Is it only nuclear weapons that cause this mushroom cloud? or if you have a big enough bomb will it cause the same kind of shape? Can you have a nuclear weapon explosion without the mushroom cloud? [link] [comments]  |
| Can a atom be made of just a neutron and an electron? Posted: 10 Aug 2016 01:50 AM PDT Can a atom be made of just a neutron and an electron? What is this called? [link] [comments]  |
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 10 Aug 2016 08:05 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| How was it known from the LIGO experiments that the blackholes are spinning? Posted: 10 Aug 2016 12:19 AM PDT This year we had a major breakthrough announcement of the detection of the gravitational waves - from the data received by the two LIGO of two colliding blackholes. In layman language, the observatories are L-shaped and use very precise LASERs to measure the phase difference between the reflected and incident wave, caused due to the gravitational waves from this massive collision. The phase difference (or path difference) is many orders less than the radius of the proton - a measurement so small that it is equivalent to measuring size of a football against the background size of Milky Way Galaxy. Clearly, it is a major achievement for humans and would open gates to more astounding space-time events. However, how, just with the phase difference data, were scientists able to infer whether one of the blackholes was spinning, what masses they had, the approximate speed at which the collision took place, the spinning speed of the new formed blackholes - (did we get that too?) and that the event took place 1.3 Billion years ago? How could we infer all that just from such a small amount of data - running the experiment for the first time without any prior callibration? Do the LIGOs have special probes for that? What is the nature of those probes? What is the nature of data that we are now looking for? And what kind of steps are being taken now to increase the sensitivity of those probes to observe events of that nature? Fortunately, there have been more observations of colliding blackholes. But how does having different mass for the blackholes (and therefore different frequency of the graviational wave) help identify them? Also, doesn't the gravitational wave, which is a energy wave moving at speed of light, dissipate energy with the space-time distance it travels? [link] [comments]  |
| Why do plant's rings tend to orbit with the equator? Posted: 09 Aug 2016 08:21 PM PDT Always in pictures of Saturn and Uranus it appears that the rings orbit with the equator of the planets. This makes sense, but I am curious as to the actual mechanics behind this happening. [link] [comments]  |
| Why do some places have two high and two low tides a day, and other places have only one? Posted: 09 Aug 2016 06:09 PM PDT For example, the Atlantic Ocean at the mouth of the St. John's river has two highs and two lows a day, while the mouth of the Escambia river has only one of each. Both are at approximately the same latitude, so form on a day to day basis, approximately the same angle with the sun and moon. Examples NOAA at Mayport (Mouth of the St. John's) https://tidesandcurrents.noaa.gov/stationhome.html?id=8720218 NOAA at Pensacola, mouth of the Escambia river. https://tidesandcurrents.noaa.gov/stationhome.html?id=8729840 [link] [comments]  |
| Posted: 09 Aug 2016 12:39 PM PDT well you see, I drank a can of coke and being a slob I am I left it on me deskaroo, so one fine day (saturday) this little wasp flys into my room, I watched him fly around and then land and enter this can of coke. he climbs around inside for a bit and then gets out and flys away. about 10 -15 mins later he comes back and goes straight back to the can in through the window. He knows exactly where to get in through the window which is only narrowly shut, most of the time flys will bang them selves off the glass until I catch them and put them out. I tried moving the can to a different table of the other side of the room and so when he came in he checked where it was originally and then went around the room looking for it. Once he found it and climbed in and out again. The next time he comes back he went to the original spot, remembered it wasn't there and then flew straight over to the second location. climbs in and out again. So this last time, I moved it back to the original spot he flys in and straight over to it. Are Wasps really this intelligent? whats going on here, he like drinks the coke (little droplets left) and flys off, Im guessing its for food but can he not alert others that there is food here? I thought they and bees only liked pollen. [link] [comments]  |
| Video game "optics" - Why does 90 FOV look so weird? Posted: 10 Aug 2016 01:56 AM PDT An image: http://i.imgur.com/FfSAdIZ.jpg?1 So here's what I'm thinking: The FOV (field of view) in a game works basically like the screen is a window into the game world, but you're looking at it with a single eye from a very close distance. So basically it'd look correct if you close one eye and just move closer to the screen, right? 70 FOV would be like your eye being 30cm/15 inches from the screen, and 90 FOV would be 20cm/10 inches (not accurately converted). Well, that doesn't work with this image. The guy on the left's face might look less stretched out, but it never looks completely normal, and the edge marked with a red line never becomes perfectly straight despite being a perfectly vertical edge in the game. Why is this? Is it really impossible to make it like this, or what's the deal here? [link] [comments]  |
| Posted: 09 Aug 2016 02:41 PM PDT With all the news about Greenland's ice sheets melting, I'm wondering how Greenland got covered in an ice sheet in the first place (southernmost latitude: ~60° N) while other places of similar latitudes such as Murmansk (~68° N) and Point Barrow (~71 ° N) are not covered under hundreds of feet of ice all year long? [link] [comments]  |
| How does long exposure on a DSLR camera work? Posted: 09 Aug 2016 06:23 PM PDT As I understand it, film becomes clear as more light hits it. However on a digital camera, each photon striking the sensor would create a spike of current, correct? Does the camera have an analog way of storing each of these spikes, like a capacitor, or does it digitally add all the spikes it has received (eg each pixel of the sensor has a digital counter, that adds up the spikes)? Or is it something else that I am not seeing here? [link] [comments]  |
| Are any mammals as sexually dimorphic as humans? Posted: 09 Aug 2016 10:12 PM PDT I think birds can be very different looking but except for humans, it seems to me without checking out genitalia, I can't readily determine sex. Is this because other mammals really do look alike between sexes or simply because I am so familiar with my own species? [link] [comments]  |
| Is individual sperm size relative to organism size? Posted: 09 Aug 2016 12:21 PM PDT For instance, are individual blue whale sperm cells much larger than human sperm cells, and are they much larger than mouse sperm cells and so on? [link] [comments]  |
| Posted: 09 Aug 2016 07:15 PM PDT Such as an effect on reaction time, or increased avoidance of cars/humans. Example animals like deer, opossum, squirrels, birds, etc. [link] [comments]  |
| Posted: 09 Aug 2016 07:09 PM PDT The common consensus seems to be that these Vikings only settled in North America for a brief period. Why are we so sure they didn't just integrate with a nearby Native tribe? [link] [comments]  |
| Posted: 09 Aug 2016 03:59 PM PDT As I understand it...
Will taking NSAIDs also reduce uterine contractions and/or their effectiveness? [link] [comments]  |
| Posted: 09 Aug 2016 10:39 AM PDT Keep in mind, it's been a while since high school, but, as I understand it, the foundations of modern geometry descend primarily from Euclid and other ancient thinkers, who lacked much of what we take for granted nowadays in modern mathematics. How did they do geometry without things like protractors, good straightedges, and plentiful scratch paper? BONUS QUESTION: As I understand it, Plato sort-of deduced the shapes of the original Platonic Solids, but did so without the ability to effectively, accurately, and/or quickly manufacture actual 3D models. Are there any insights on how he did so? Or was he just that good? [link] [comments]  |
| Why are caterpillar nests in specific trees? Posted: 09 Aug 2016 04:20 PM PDT I was driving and noticed that certain trees have caterpillar nests and some don't. Is this because of their diet or something else? What types of trees are they? [link] [comments]  |
| While THC is still "in your system", how much, if at all, are you still under its effects? Posted: 09 Aug 2016 04:10 PM PDT It has been very loosely demonstrated that a "marijuana hangover" effect exists that seems to be unrelated to THC's normal effects (http://www.ncbi.nlm.nih.gov/pubmed/2992898), but does THC being in your system for ~2-4 weeks have any effect on you related to it's initial effects? [link] [comments]  |
| What is the full chemical process when tea is brewed with tea leaves, a pot and a kettle? Posted: 09 Aug 2016 03:23 PM PDT |
| Posted: 09 Aug 2016 04:10 PM PDT |
| How do swept wings reduce wave drag? Posted: 09 Aug 2016 03:27 PM PDT |
| Is there any scenario where the speed of sound is close to/at the speed of light? Posted: 09 Aug 2016 06:06 PM PDT |
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