In terms of a percentage, how much oil is left in the ground compared to how much there was when we first started using it as a fuel? |
- In terms of a percentage, how much oil is left in the ground compared to how much there was when we first started using it as a fuel?
- Why do EKGs require 12 leads, and why are they placed where they are?
- Is there a limit to how big a Rocky Planet like Earth can get?
- Is the handedness of a subject important to know for doctors and scientists, and if so, why?
- What would happen when you microwave something with the window open?
- If my gravity and Earth's gravity are pulling ourselves together, can the same be said about a mountain and earth?
- How does the cysteine in cytochrome p450 make it more reactive than hemoglobin which has a histidine?
- [Earth Science] How does the farmer almanac work?
- How accepted is I. Pigarev's theory that sleep is used by the brain to process input from internal organs?
- How does a website know a credit card number is invalid?
- Can someone explain the basics of Parity violation, in terms of a Lee and Yang's spinning radioactive nucleus?
- What percentage of people fall exactly at the median in a normal distribution (e.g. IQ of exactly 100)?
- Does a 'super moon' increase the chances of earthquakes or other serious geological activity?
- For how long do you need to maintain 'escape velocity' in order to escape Earth's gravitational pull?
- Does a computer heat the same way a heater heats ?
- How do we know that "martian meteorites" are from Mars?
- If I click through 100.000 random images, do some of my older memories get erased to store new ones of these images?
- Why does Aluminium foil make so much noise when manipulating it ?
- What actually happens in brain when it feels tired?
- If you breathe against a cold surface and collect the condensation water, would your DNA be analyzable?
- Massive bodies orbit in conic sections under Newtonian gravity. What shape would a photon's orbit be?
- Can an integer be infinite?
- Can a mitchochondria from a plant cell survive in an animal cell?
- Why are batteries (especially disposable, but also the ones inside a laptop battery etc) always cylinder shaped? wouldn't they be able to fit more battery into more rectangular volumes?
| Posted: 20 Nov 2016 08:18 AM PST An example of the answer I'm looking for would be something like "50% of Earth's oil remains" or "5% of Earth's oil remains". This number would also include processed oil that has not been consumed yet (i.e. burned away or used in a way that makes it unrecyclable) Is this estimation even possible? Edit: I had no idea that (1) there would be so much oil that we consider unrecoverable, and (2) that the true answer was so...unanswerable. Thank you, everyone, for your responses. I will be reading through these comments over the next week or so because frankly there are waaaaay too many! [link] [comments]  |
| Why do EKGs require 12 leads, and why are they placed where they are? Posted: 20 Nov 2016 09:16 PM PST Pretty much what the question said. Why do EKGs use 12 leads instead of any other number, and what's the significance of their placement, including the ones on the arms and legs? [link] [comments]  |
| Is there a limit to how big a Rocky Planet like Earth can get? Posted: 20 Nov 2016 06:34 PM PST Like can there be a Earth type planet the size of the Sun. [link] [comments]  |
| Is the handedness of a subject important to know for doctors and scientists, and if so, why? Posted: 21 Nov 2016 12:27 AM PST I've seen a couple of medical TV shows recently where they talk about patients or test subjects as follows:
I'm just wondering whether that's considered important in real life and if so why? My doctor has never once asked me which hand I use, for instance. [link] [comments]  |
| What would happen when you microwave something with the window open? Posted: 20 Nov 2016 08:39 PM PST Just a thought i had when i was microwaving some instant lunch [link] [comments]  |
| Posted: 21 Nov 2016 05:00 AM PST It's hard to explain, but is the mountain considered part of Earth so its gravity is just a part of the whole gravity of Earth? Or is it a separate mass which pulls on earth and earth pulls on it? If I am standing between a massive mountain and a massive canyon is the gravity of Earth pulling me more towards the mountain? [link] [comments]  |
| Posted: 20 Nov 2016 08:27 PM PST I understand the structural differences between cytochrome p450 and hemoglobin but I can't figure out why cytochrome is more reactive than hemoglobin in that the dioxygen is cleaved. I was thinking it had something to do with polarization/electronegativity but I couldn't find anything online. [link] [comments]  |
| [Earth Science] How does the farmer almanac work? Posted: 20 Nov 2016 07:03 PM PST I don understand what they use to predict weather so accurate. Who makes the almanac? [link] [comments]  |
| Posted: 21 Nov 2016 08:00 AM PST TIL about Ivan Pigarev's "visceral" theory of sleep. Basically it states that sleep is required to switch the brain from processing of data from external sensors (eyes, ears etc.) to internal ones, like receptors in intestines, and do the adjustments accordingly. In his works he shows that if one stimulates e.g. the intestine of a sleeping animal it causes the response in visual cortex which is very similar to the response to flickers of light during the day, whilst there is no such response in waking state. He states that they conducted hundreds of experiments on animals in support of the view. This was completely new to me (which is to no surprise, I'm quite illiterate in neurophysiology) and I'm fascinated by the idea. The first thing I did is checked if his works are legit and if he has publications in respectable magazines, which he seem to have. He also doesn't look like a usual "science freak" which are plenty around here. However, I tried to google some popular articles in English about that but haven't found much. So I want to know if this view is known to Western scientists and if yes what is the common opinion on that? Community's opinion on the matter would be also great to hear! [link] [comments]  |
| How does a website know a credit card number is invalid? Posted: 20 Nov 2016 01:38 PM PST I have noticed before that if I make a typo, it can tell that a number is invalid. How? It can also tell if a number is Visa or MasterCard. How does it know? [link] [comments]  |
| Posted: 20 Nov 2016 06:24 PM PST I am trying to get my head around the principle of Parity violation. By holding a theoretical mirror up to a spinning nucleus which is ejecting an electron, the 'reflection' obviously shows the electron being released in the opposite direction of spin to that of the actual experiment(because it's a reflection - fine) My question is: Is the main issue here simply that , in order for parity to remain intact, many emissions should occur with equal probability in each direction relative to spin, just so that a hypothetical conclusion being drawn from mirror world would not differ from that drawn from the actual experiment? I believe that is the point, but that conclusion seems to require an assumption that there is nothing special about direction of spin (so nature "should not" be able to tell)? Where as, if there is something special, then it may be that it shouldn't be any surprise that it always is emitted in the direction of spin? Why does concluding that "electron emmission favors the nuclear direction of spin" have to be a significant realisation? [link] [comments]  |
| Posted: 20 Nov 2016 05:14 PM PST I realize that there's a confidence interval involved with IQ but it's the practical application of this that always bothered me. I've asked a variety of psychologists and various math professionals but no one seems to know off the top of their head or even really understand what I'm asking. I keep getting the answer of "50% of people have IQs of 100 because it's the 50th percentile" but the percentile just means that 50% of people are below 100, so that doesn't really make sense to me (correct me if I'm wrong, please!). In statistics I know there's the 68, 95, 99.7 rule about standard deviations, which means that about 68% of people have IQs between 85 and 115 (on a test with an SD of 15). I've also heard that 50% of people fall between 90 and 110 (not sure how true that one is, not from a textbook). Of course this isn't an exact science, especially with IQ tests specifically, but I'm just curious about how it works on a normal distribution. What percentage of the distribution lands exactly at the mean? Thank you anyone who can help! [link] [comments]  |
| Does a 'super moon' increase the chances of earthquakes or other serious geological activity? Posted: 21 Nov 2016 01:32 AM PST Is their any correlation between the pull of the moon and earthquakes? [link] [comments]  |
| Posted: 20 Nov 2016 02:29 PM PST |
| Does a computer heat the same way a heater heats ? Posted: 21 Nov 2016 05:10 AM PST Hi guys Let's say my computer uses 500W of electricity when I'm doing some heavy computation on it (I put a random number here, just for the example). Is it equivalent to having a heater using 500W ? ... Winter is coming ... :) [link] [comments]  |
| How do we know that "martian meteorites" are from Mars? Posted: 21 Nov 2016 01:17 AM PST I read an article about this Rock that was found in Antarctica in 1984. Wikipedia says "Based on chemical analyses, it is thought to have originated on Mars". I can imagine this rock having a chemical composition unlike anything we have ever seen on Earth. But how can you conclude that this rock is from Mars if you don't know what the chemical composition of Mars rocks is in the first place? As far as I know we have a robot on Mars today capable of doing elemental analysis, thus we should be able to figure out whether the next space rock we find comes from that particular location on Mars or not. But how did they do this back in the 80s I wonder? [link] [comments]  |
| Posted: 21 Nov 2016 04:49 AM PST Or are these memories of irrelevant images are not stored in long term memory? Does working with clipart slowly write over my memories? [link] [comments]  |
| Why does Aluminium foil make so much noise when manipulating it ? Posted: 21 Nov 2016 04:28 AM PST Hi Reddit ! Ok so I was making a ball for my cat and when I was doing so I wondered why did the aluminium foil make so much damn noise, hope you can answer to it, have a nice day ! [link] [comments]  |
| What actually happens in brain when it feels tired? Posted: 21 Nov 2016 04:27 AM PST |
| Posted: 21 Nov 2016 04:22 AM PST |
| Posted: 20 Nov 2016 01:35 PM PST Assuming it makes sense to think of photons as bodies of constant speed and ignore relativistic effects. Does the shape of the orbit of such a body have a name? [link] [comments]  |
| Posted: 21 Nov 2016 03:46 AM PST Must integers be finite? or is it okay to write one like ".....2112255"? because if they don't have to be finite then there exists an injection from R to N and thus they'd be the same kind of infinity. [link] [comments]  |
| Can a mitchochondria from a plant cell survive in an animal cell? Posted: 21 Nov 2016 03:43 AM PST |
| Posted: 20 Nov 2016 02:41 PM PST |
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