If 13% of the Netherlands was under the ocean in the last few hundred years, why is the land so fertile? |
- If 13% of the Netherlands was under the ocean in the last few hundred years, why is the land so fertile?
- How do we know pi is infinite?
- I know this is an topic, but how credible is this article on the effects of violent video games?
- How does space affect heat-seeking munitions/weapons?
- By what mechanism does salt lower the boiling point of water?
- Does hot water flow faster than cold water?
- Is it known why histone variants are added to different parts of the genome?
- How do animals with eyes on either side of their head see?
- Is it possible for two planets to be in the same orbit path?
- Has hunting male deer with the most points had an effects on deer population due to artificial selection via hunting?
- Does NASA have a manned mission to Mars planned if anything breaks on the Rover? If so, could anyone tell us details?
- How do predators know which prey to hunt?
- Can high and low pressure systems become small enough that multiple systems hit an area in a single day?
- Would it be possible to make a magnet in the form of a hollow sphere where the north is the outside and the south is the inside?
- Has food whether it is in a solid or liquid state an impact on the nutrional value?
- If volcanoes created Hawaii, how did seeds (ect..) get there to form the life there before humans?
- How much does sound perception differ from person to person?
- How can we predict if a material is transparent, reflective or absorbs light based on its chemical structure?
- Why does a granular solid expand under pressure? Where is the energy coming from?
- How does an antenna on a radio telescope know the polarization of reflected waves from the parabolic surface?
- Does friction force increase with velocity?
| Posted: 11 Jan 2017 05:49 PM PST Shouldn't the land be really salty, instead of being incredibly arable? [link] [comments]  |
| How do we know pi is infinite? Posted: 11 Jan 2017 04:55 PM PST I know that we have more digits of pi than would ever be needed (billions or trillions times as much), but how do we know that pi is infinite, rather than an insane amount of digits long? [link] [comments]  |
| I know this is an topic, but how credible is this article on the effects of violent video games? Posted: 12 Jan 2017 06:03 AM PST Title was mean to say "I know this is an old topic" my bad. Article in question: http://www.apa.org/science/about/psa/2003/10/anderson.aspx The statements that Dr. Craig Anderson make seem a little odd. This for example: Myth 6. There are no studies linking violent video game play to serious aggression. Facts: High levels of violent video game exposure have been linked to delinquency, fighting at school and during free play periods, and violent criminal behavior (e.g., self-reported assault, robbery). He doesn't really say if it's a huge reason why those acts happen or if its just a factor. Also it seems odd since last I checked there wasn't any epidemic of robberies and assault done in the name of video games. Or is it the same old, oh this person played violent video games and robbed someone/attacked someone, clearly the video games were on of the main reasons! I don't see my friends going around robbing people or attacking them. Sure some people do it, but isn't because its violent video games on top of being already mentally aggressive and having a troubled youth? Also the whole delinquency angle sounds strange to me, is there any merit to that claim outside of his own study? Another statement he makes that I find odd: Myth 11. If violent video games cause increases in aggression, violent crime rates in the U.S. would be increasing instead of decreasing. Facts: Three assumptions must all be true for this myth to be valid: (a) exposure to violent media (including video games) is increasing; (b) youth violent crime rates are decreasing; (c) video game violence is the only (or the primary) factor contributing to societal violence. The first assumption is probably true. The second is not true, as reported by the 2001 Report of the Surgeon General on Youth Violence (Figure 2-7, p. 25). The third is clearly untrue. Media violence is only one of many factors that contribute to societal violence and is certainly not the most important one. Media violence researchers have repeatedly noted this. Pay attention to this "Media violence is only one of many factors that contribute to societal violence and is certainly not the most important one. Media violence researchers have repeatedly noted this." He stated that video games have been linked to robbery and assault, but says it is only a small factor now. It sounds like he was trying to make video games sound WAY worse than they really are. Also what annoys me about this whole article, is that it doesn't touch on the subject of do video games directly make people violent. As in if I don't have other risk factors or I have very few, could video games alone make me into a violent person? Anyways thanks to whoever has read this, if you are a professional on this type of stuff I would really appreciate an answer/perspective. Thanks in advance! [link] [comments]  |
| How does space affect heat-seeking munitions/weapons? Posted: 11 Jan 2017 10:48 PM PST Really three questions. Hey folks. I'm a SciFi Writer. I have a few questions, to inform a short story I'm working on. Thank you in advance. Anyhow, on to my questions. 1) I can remember reading or hearing that heat travels through space via radiation. How would this affect heat seeking missiles (suppose a craft is targeting another craft)? 2) Since, according to Wikipedia, heat is a form of electromagnetic radiation, how would electromagnetic pulses affect this? Assuming the characters did some faraday cage stuff, could an EMP be used as a countermeasure (even if they can't directly disable the munition)? 3) In lieu of using heat to track, would it be viable to have weapons that track via light (ie the light of engines)? I've written it in so far like this (assuming heat is a no go), and the Humans use fast-moving reflective flachette to reflect light from their engines and the sun to fool such devices. [link] [comments]  |
| By what mechanism does salt lower the boiling point of water? Posted: 11 Jan 2017 06:37 PM PST |
| Does hot water flow faster than cold water? Posted: 11 Jan 2017 07:38 PM PST Just went through my head as particles move faster with heat, does it affect the flow. [link] [comments]  |
| Is it known why histone variants are added to different parts of the genome? Posted: 12 Jan 2017 06:23 AM PST I keep seeing that they are added, but not why. For example H2AZ is incorporated into regions of high activity, but why? Does it have a function? [link] [comments]  |
| How do animals with eyes on either side of their head see? Posted: 11 Jan 2017 03:42 PM PST Do they have the ability to alternate which eye they use at a certain time? Or instead, is the image that their brain receives a combination of visual input of both eyes? [link] [comments]  |
| Is it possible for two planets to be in the same orbit path? Posted: 11 Jan 2017 04:28 PM PST |
| Posted: 11 Jan 2017 06:19 PM PST E.g. The deer with the less amount of points on its antlers gets to live longer to pass on it's genes regarding lower point count regarding antlers. [link] [comments]  |
| Posted: 12 Jan 2017 07:01 AM PST Details such as a time frame of the mission, amount of people, etc? [link] [comments]  |
| How do predators know which prey to hunt? Posted: 12 Jan 2017 06:24 AM PST e.g. many birds of prey like to eat mice; and I understand that the size of mice fits well for this example, but how do they know that mice will taste good and contain the necessary nutrients? [link] [comments]  |
| Posted: 12 Jan 2017 05:23 AM PST |
| Posted: 12 Jan 2017 01:36 AM PST I Assume it would require a tiny hole somewhere to be able to put something inside it to create the polarization of the magnet? [link] [comments]  |
| Has food whether it is in a solid or liquid state an impact on the nutrional value? Posted: 12 Jan 2017 04:12 AM PST I have searched for a scientific article about this and I found this. In the article can be seen the food intake for the next meal was higher with those who had a meal in a liquid state. But can someone clarify whether the body can extract less value out of a liquid meal or because there is a difference in the hormon balance between the two type of meals, or because the digestion took less time. [link] [comments]  |
| If volcanoes created Hawaii, how did seeds (ect..) get there to form the life there before humans? Posted: 12 Jan 2017 02:59 AM PST I understand how soil would form, but how would anything grow? If there are no seeds there, how would trees, grass, or any plant for that matter grow? [link] [comments]  |
| How much does sound perception differ from person to person? Posted: 11 Jan 2017 04:01 PM PST As a producer I deal with balancing frequencies, and I was wondering if everyone has their own internal "frequency response" that changes the way they perceive audio, and if so, how much variance is there? [link] [comments]  |
| Posted: 12 Jan 2017 02:32 AM PST Asked by my 10 year old son upon learning about the periodic table of elements: does the table help us know if a material is bright or dark? I found great resources online explaining light in simple terms, such as http://www.madsci.org/posts/archives/1999-08/934381368.Ph.r.html But this fails to account how incident light strikes atoms in the material to excite the electrons, and makes the photons bounce back (reflection, bright material), keep the electron excited (absorption, black), or let the photon pass-through (transparent). Any way to explain this simply? [link] [comments]  |
| Why does a granular solid expand under pressure? Where is the energy coming from? Posted: 12 Jan 2017 02:06 AM PST When pressure is exerted on a granular solid inside a tall cylindrical container, the distance between all the grains expands. So when you add more sand into the container, the sand at the very top should move upwards due to the expansion of the sand below it. Where is this kinetic energy coming from? References from where I discovered granular expansion: http://tid.uio.no/~dansh/pdf/author/jaeger-RMP.pdf http://www.cpt.univ-mrs.fr/~barrat/Molphys.pdf http://www.math.upatras.gr/~phdsch11/wp-content/uploads/2011/05/Paper-1.pdf [link] [comments]  |
| Posted: 11 Jan 2017 07:12 PM PST For example, if the waves from an astrophysical source are all polarized, wouldn't this polarization change directions when the wave is reflected off of the parabolic surface and thus not register with the antenna if the antenna only responds to an electromagnetic field polarized in a particular axis? [link] [comments]  |
| Does friction force increase with velocity? Posted: 11 Jan 2017 12:54 PM PST I know we usually express friction as F_f = N*mu, which is a simple model that holds for many cases. My question is does friction force actually depend on velocity? Does a wheel rotating about an axis really experience the same friction whether it's going at 1 rpm or 1000 rpm? [link] [comments]  |
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