If nylon stockings rip all the time, why don't we use another material? |
- If nylon stockings rip all the time, why don't we use another material?
- Can a particle be annihilated by a non-matching anti-particle?
- When looking at text through a wine-glass filled with water, why are the text both reversed AND upside down?
- Would it be possible to transfer the rotational momentum of the earth into usable energy?
- Can animals tell if others of their kind suffer from significant mutation, and does it affect how they socialise?
- Does sociopaths and psychopaths have nightmares?
- How close are we to be able to use nuclear fusion to produce our energy?
- Since DNA is an acid, is there such thing as DNA salts?
- Why is an accretion disk formed around a black hole instead of all the matter getting absorbed by the black hole instantaneously? Does this mean that black holes have a limit for rate at which matter can be absorbed?
- Why is isopropyl alcohol sold in drugstores, etc., instead of propyl alcohol?
- Where is the center of gravity between earth and the moon? Are we revolving about that? If so how does it affect our orbit of the sun?
- Are Positrons Antiparticles or Antimatter?
- Why did they take fluoride out of the water?
- How many foreign entities does your body's immune system actively fight against on average at given time?
- What is the binding energy of a black hole?
- Why do black holes spew matter in two directions only instead of in all possible directions?
- Are there mirror that only reflect ultraviolet wavelengths and not light in the visible spectrum?
- Are atoms actually bouncing off of each other in a gas? Or do they approach each other, and then get pushed apart by electrostatic repulsion?
- Why is it that when metal conductors are cooled they have lower resistance? Can you lower resistance by increasing pressure as well?
- Was prehistoric man less intelligent than modern man, or do we just know more?
- What would the physiological effects of brief exposure to vacuum be after exposure?
- Have humans discovered organism(s) that appear to possess the ability to live indefinitely?
- Is there any possible sun-planet-moon configuration that would yield a full moon every night?
| If nylon stockings rip all the time, why don't we use another material? Posted: 25 Oct 2015 01:34 PM PDT |
| Can a particle be annihilated by a non-matching anti-particle? Posted: 25 Oct 2015 10:18 AM PDT Electrons and positrons can annihilate on contact. There are others sets of particles and anti-particles that can do the same. (Quarks and anti-quarks) Can an electron and anti-quark annihilate, or would a container made of quarks and empty of electrons be able to contain positrons with no annihilation happening. (Assuming the positrons couldn't reach past the wall somehow). Given there are anti-protons and anti-neutrons made of quarks, can the quarks within them lead to a partial annihilation. (A proton quark annihilates an anti-neutron anti-quark leaving other quarks and anti-quarks behind) [link] [90 comments]  |
| Posted: 25 Oct 2015 10:03 AM PDT I recently watched a video regarding arrows reversing behind a glass filled with water, and the concept of the light refracting through the glass and water to flip the image/text behind it horizontally was easily understood. Last night I coincidentally saw this phenomenon when a friend's wine-glass was put in front of my pc's monitor with the digital-time showing behind the glass from where I sat. I thought "Yes! I'll try to sound smart by explaining to them why the time on my monitor were reversed and upside down when seen through the wine glass!". So I started explaining and got the the part of why it was flipped horizontally, but then I didn't know why the time was flipped upside down as well. Today I tried finding an answer online but only the typical horizontally flipped explanations were found. Then I thought about the shape of the glass itself; that the light entering the wine-glass from my point of view was being refracted both horizontally and vertically as opposed to only being flipped horizontally through a cylindrical-shaped glass as in the video. Is it correct to assume that this is because of the shape of the glass? Thanks! [link] [12 comments]  |
| Would it be possible to transfer the rotational momentum of the earth into usable energy? Posted: 25 Oct 2015 10:37 AM PDT |
| Posted: 25 Oct 2015 08:45 AM PDT |
| Does sociopaths and psychopaths have nightmares? Posted: 25 Oct 2015 12:41 PM PDT Last night after a bad dream while trying to sleep again I start wondering, since sociopaths and psychopaths lack remorse or empathy, how would their nightmares be? or do they even have nightmares at all? some of my most terrible dreams are losing somebody close to me or hurting somebody I truly care. Can´t imagine someone with these disorders losing sleep for something like that. [link] [86 comments]  |
| How close are we to be able to use nuclear fusion to produce our energy? Posted: 26 Oct 2015 05:34 AM PDT I was taught when I was in school that fusion, at that time, took more energy to achieve than was released. However I heard someone claiming that we are very close to achieving fusion with a net energy output (I think its called cold fusion?). How true is this? [link] [1 comment]  |
| Since DNA is an acid, is there such thing as DNA salts? Posted: 26 Oct 2015 05:40 AM PDT |
| Posted: 25 Oct 2015 10:14 PM PDT |
| Why is isopropyl alcohol sold in drugstores, etc., instead of propyl alcohol? Posted: 25 Oct 2015 12:21 PM PDT I understand the difference between propanol and 2-propanol, but why is 2-propanol/isopropyl alcohol sold in stores as a cleaning agent rather than its isomer? What is the advantage to this? Thanks [link] [9 comments]  |
| Posted: 25 Oct 2015 01:51 PM PDT |
| Are Positrons Antiparticles or Antimatter? Posted: 26 Oct 2015 05:53 AM PDT So: Take an electron. Its opposite is a positron, correct? A positron is an anti-electron, right? (Yes.... I have read wikipedia!) Is a positron antimatter? (Wiki says it is.....) Or just an anti-particle, made of matter, not antimatter? (Again wiki says it is so.... to my surprise...) If so, what exactly is antimatter? Just oppositely charged atomic & subatomic particles? Could you have electrons and positrons made of matter AND electrons and positrons made of antimatter? Or have I misunderstood the whole antimatter thing completely, and over thought / over complicated it? [link] [3 comments]  |
| Why did they take fluoride out of the water? Posted: 25 Oct 2015 08:54 PM PDT Recently my city decided to take fluoride out of the public water and I can't find any unbiased or not-zany information as to why they did this. A couple of people I've talked to say that it was a tax dollar thing and that fluoride in water isn't actually good for your teeth and it was more to help keep pipes from corroding. I don't trust these viewpoints so I have a couple of questions. 1.) In addition to healthy teeth (and mind control /s), what is the other purpose of adding fluoride to drinking water if any. 2.) Does fluoride in drinking water make much of a difference in preventing tooth decay? I've read a few stories of other places that have removed it (Calgary, Portland) and dentists claim there has been an increase in tooth decay, primarily among children aged 6 and under. Is there any evidence of this that's not anecdotal? 3.) What are reasons that cities stop fluoridation? Just to save cash? Edit: clarity. [link] [10 comments]  |
| Posted: 25 Oct 2015 09:20 PM PDT |
| What is the binding energy of a black hole? Posted: 25 Oct 2015 09:44 AM PDT Does it even make sense for that question to be asked? If so, the binding energy can presumably be exceeded if the black hole had an incredibly high charge. Though such a situation would never occur in our universe, what would happen? [link] [8 comments]  |
| Why do black holes spew matter in two directions only instead of in all possible directions? Posted: 25 Oct 2015 10:33 PM PDT Why would black holes be only able to spew matter from two poles? [link] [4 comments]  |
| Are there mirror that only reflect ultraviolet wavelengths and not light in the visible spectrum? Posted: 25 Oct 2015 11:59 PM PDT If ordinary silver mirrors reflect just light in the visible band, then does there exist mirrors made of materials that exclusively reflect light in the infrared, x-ray, or uv family of spectra in exclusion to other wavelengths? [link] [2 comments]  |
| Posted: 25 Oct 2015 11:50 PM PDT |
| Posted: 25 Oct 2015 05:32 AM PDT What is going on at the molecular&/subatomic levels that makes this possible? Thanks! [link] [14 comments]  |
| Was prehistoric man less intelligent than modern man, or do we just know more? Posted: 25 Oct 2015 10:15 PM PDT |
| What would the physiological effects of brief exposure to vacuum be after exposure? Posted: 25 Oct 2015 08:55 PM PDT To elaborate, I have read several articles and informational pieces on the subject, but cannot find enough specific information to satisfy my specific curiosity. Specifically, I am a writer, and have come across the need to detail the physical effects on a subject of being exposed to decompression to vacuum over a period of approximately 5-10 seconds, followed by an additional 5-10 seconds of exposure to vacuum, then repressurization over approximately 30-60 seconds. I am hoping to get some fairly concrete information to firstly be sure that such a scenario would be survivable without significant medical aid afterwards, and secondly to properly describe whatever physiological after-effects would occur. If important to the outcome, the subject is a woman of approximately 25 years age of an average physical build and general health. The decompression event is not that of being ejected into space, but rather of being stationary inside a vessel as it loses pressure rapidly. [link] [1 comment]  |
| Have humans discovered organism(s) that appear to possess the ability to live indefinitely? Posted: 25 Oct 2015 10:36 PM PDT |
| Is there any possible sun-planet-moon configuration that would yield a full moon every night? Posted: 26 Oct 2015 03:42 AM PDT As in is there a set parameters (i.e. orbital distances, mass ratios, etc.) that would cause the moon to be "stuck" in "full moon position"? [link] [2 comments]  |
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