Water solubility of caffeine, or, if I use a tea bag a second time has it become mostly decaffeinated? |
- Water solubility of caffeine, or, if I use a tea bag a second time has it become mostly decaffeinated?
- When a heavy nucleus breaks apart, the two resulting nuclei are more "Tightly bound" than they were before, but why does this mean they have less mass?
- Is there a maximum voltage obtainable by simply stacking transformers one after the other?
- What was the temperature at Planck time and GUT transition?
- Could someone explain the technology in todays tires that make them superior to the tires of the 80's and 90's?
- Could a planetary system be close enough to a nebula so as to have "nebula-lit night sky?"
- With our new ability to measure changes in gravity, could information from within the event horizon of a black hole be communicated by creating gravitational waves within the black hole?
- Why we see the sun sometimes yellow, sometimes orange, and sometimes white? And why during the day it could change de color?
- Is it possible for photons to have a stable orbit around a black hole?
- If you made the gas of a gas planet (Neptune, Jupiter, et cetera) invisible, would it still be a giant planet? If you coloured Earth's atmosphere, would it be akin to a gas planet?
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- What is the purpose of neuron synapses?
- Can anyone please explain the difference between LUMENS and candela per square meter (CD/sqm) (In human language) as a measure of light brightness?
- Will the moon ever collide with the earth?
- If our current Universe is Infinite then does it mean that every single part of our infinite universe have same laws of physics as we follow?
- If you give somebody mouth to mouth breaths, aren't you ventilating them with a high percentage of CO2?
- Why is proper time invariant?
- Do metals (such as iron) rust faster in running water or in a stagnant pool?
| Posted: 23 Feb 2016 12:04 PM PST So I find that I can get two cups of tea out of a tea bag (which I'm sure infuriates tea purists). I like to avoid caffeine near bead time, so I was wondering whether a second steeping of a tea bag would produce a mostly decaffeinated tea. So what do you think? Does most of the caffeine dissolve on the first steep? What I've learned today:
Thanks all for the answers! [link] [comments]  |
| Posted: 23 Feb 2016 02:23 PM PST |
| Is there a maximum voltage obtainable by simply stacking transformers one after the other? Posted: 23 Feb 2016 09:33 AM PST What stops me from stacking 10 transformers which each multiply the voltage by 100, getting a compounded 1020 fold increase in voltage, with an initial voltage of 1 V, each electron would get an energy increase of 1020 eV, easily surpassing the LHC, so what stops this from happening? [link] [comments]  |
| What was the temperature at Planck time and GUT transition? Posted: 23 Feb 2016 10:06 AM PST During the early Universe the relation between time and temperature is given by t = 2.4 * g-1/2 * (T/1 MeV)-2 s, where g is relativistic degrees of freedom (which should be 106.75 at above the electroweak transition). Is this the right formula to use to get the temperature at Planck time (5.39 * 10-44 s) and similar to get time at GUT transition at e.g T=1015 GeV? The degrees of freedom, g, should grow as we go back in time. Are there any estimates for this at the Grand Unified Epoch and Planck Epoch? The reason I started thinking about this was that I kind of always though the temperature at the Planck time was just the Planck temperature... PS: Short answers are welcome :) [link] [comments]  |
| Posted: 23 Feb 2016 01:40 PM PST Im asking because I bought a car recently. Its in mint condition even though its from 1993. The tires look okay, because they havent been used too much, but they are over 20 years old. I beleive I should get some new tires on it and I've been told that the tire industry has been able to develop better tires with better technology. While I believe this, how have they improved and what difference does it make ? [link] [comments]  |
| Could a planetary system be close enough to a nebula so as to have "nebula-lit night sky?" Posted: 24 Feb 2016 06:08 AM PST |
| Posted: 24 Feb 2016 12:39 AM PST Let's say I have a gun, that when fired creates a (strong) gravitational field. Thus, firings of this gun could (I believe, correct me if I'm wrong) be measured with LIGO. Since a black hole's own gravity can escape it's event horizon (?), could firings of the gun be detected from within it? Could firings of different magnitude be used to transmit binary data? Does this question make any sense at all? [link] [comments]  |
| Posted: 24 Feb 2016 04:51 AM PST |
| Is it possible for photons to have a stable orbit around a black hole? Posted: 24 Feb 2016 01:54 AM PST |
| Posted: 24 Feb 2016 05:35 AM PST Okay so I'm really dumb and bad at planet-stromony, but I was thinking about where the gas stopped in a gas planet... Once you got to the solid part of the planet, wouldn't all if the gas above it be like the atmosphere of Earth, except far less transparent? And if Earth's atmosphere was made up of different gasous material that wasn't invisible, would it be a lot bigger to look at? Can someone please explain to me how absolutely wrong I am? [link] [comments]  |
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 24 Feb 2016 07:05 AM PST 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]  |
| What is the purpose of neuron synapses? Posted: 23 Feb 2016 08:29 AM PST Why is it necessary to have a gap between an axon and a dendrite? Why not just have one continuous path? [link] [comments]  |
| Posted: 24 Feb 2016 02:05 AM PST I am sourcing a product, a bicycle light. Have 2 options. One option has higher lumens (cheaper) but the other has higher CD/sqm (more expensive). I am now having difficulty understanding the difference between lumens and candella per sqm. Which one is a better indicator of light quality/intensity? [link] [comments]  |
| Will the moon ever collide with the earth? Posted: 24 Feb 2016 04:09 AM PST So when satellites orbit the earth they will eventually fall after many many years, will the same happen with the moon eventually? Will it collide with earth as its pulled towards us as its orbit slows due to drag or other gravitational forces from the sun? [link] [comments]  |
| Posted: 24 Feb 2016 03:48 AM PST Or does having infinite possibilities of outcome would result in parts of the universe with slightly different or totally different physical laws that we observe? [link] [comments]  |
| Posted: 23 Feb 2016 06:18 PM PST |
| Posted: 24 Feb 2016 02:48 AM PST I'm sorry, this may be an extremely dumb question, but what I mean is: proper time is the time measured by a clock at rest relative to the given frame of reference, it makes no sense to me to call it 'invariant' since we cannot, by defenition, measure it relative to any other frame. [link] [comments]  |
| Do metals (such as iron) rust faster in running water or in a stagnant pool? Posted: 23 Feb 2016 04:55 PM PST Pulling up metal out of fast moving streams, it seems like they always have a thick coating of rust, almost impenetrable (although this may have something to do with the amount of time they spend in the stream). Bits of metal I find at the bottom of lakes or ponds, however, rarely have the dense rust, just a thin layer. I know that rust is caused by oxidation, but would the presence of more oxygen rich water moving over a piece of metal give the metal a thick coating that would protect the metal or contribute to a constantly growing layer of rust. Thanks [link] [comments]  |
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