When they announce discovery of a new breed of bird or fish or whatever, are they always meaning "Never before discovered" or does it sometimes mean a new crossbread from previous breeds/types? |
- When they announce discovery of a new breed of bird or fish or whatever, are they always meaning "Never before discovered" or does it sometimes mean a new crossbread from previous breeds/types?
- Theoretical physics- What if there was no speed limit like the speed of light?
- How can white noise and the Dirac distribution have the same Fourier transform?
- Why Do Particles Have More Energy When Apart?
- Why does hawking radiation cause black holes to evaporate?
- Does the ice sheet of Antarctica have a "bottle cap effect" on the recently discovered volcanoes underneath?
- Has the evolution of mammals and of the human race been a steady progression of increasing body size, or were there periods when our ancestral lineage underwent significant decreases in body size?
- Products, such as glue, that are purple but disappear/turn clear--how do they work?
- What is a Vector? What is a Tensor? And how are these two things used in AI and processor design?
- What changes in the brain causes different people to have varying working memory capacities?
- Is it possible to replace femur with something artificial?
- Can scaring someone actually cause a cardiac arrest? And if so how does it work on a electrical conduction level in the heart?
- If heat rises, why are higher altitudes so cold?
- Why is my facial hair a different texture than my head hair?
- What do we gain by making microchips smaller and smaller over time ?
- Do gas giants have a solid core?
- What is happening, on a cellular level, when we stretch?
- Why is there an nth root symbol when you can just write it as an exponent?
- In regard to scientific research, what is a treatment?
- Why don't Tesla cars break traction despite accelerating so much more quickly than combustion engine cars?
- In a wood fire, what is hotter and why, the glowing embers or the open flame?
- If lightning struck the ocean, how far away would you have to be to not get electrocuted?
- What keeps food from ‘going down the wrong pipe’ and doesn’t when said event occurs?
| Posted: 12 Aug 2017 08:14 PM PDT |
| Theoretical physics- What if there was no speed limit like the speed of light? Posted: 12 Aug 2017 10:00 PM PDT I think that this may be a silly question, but what would happen in a universe where there was no speed limit? I understand that speed affects time dilation, etc., but what else would we lose? [link] [comments]  |
| How can white noise and the Dirac distribution have the same Fourier transform? Posted: 13 Aug 2017 03:15 AM PDT I have learned in school (and confirmed with a quick Google search) that the Fourier transform of both white noise and the Dirac distribution to be the constant function F(f)=1 However, I am under the impression that the Fourier transform is a bijection, although I have never seen a proof of that claim (but I suppose we would take a lot more precautions before applying the inverse Fourier transform if it weren't bijective). Where's the catch ? [link] [comments]  |
| Why Do Particles Have More Energy When Apart? Posted: 13 Aug 2017 03:15 AM PDT I got some notes from my teacher on binding energy which states that 'Particles have more energy apart, and therefore more mass'. So, do any of you guys know why particles have more energy when apart and how this results in those particles having more mass? Thanks. [link] [comments]  |
| Why does hawking radiation cause black holes to evaporate? Posted: 13 Aug 2017 07:14 AM PDT My basic understanding of Hawking Radiation is that a particle-antiparticle pair will occasionally come into existence close to the event horizon. While in normal circumstances they would quickly annihilate each other, when near the event horizon it is possible for the anti-particle to be amalgamated into the black hole, and the particle to be emitted. Is it not equally as likely that the particle would be amalgamated, and the anti-particle emitted, leading to a no net loss/gain of particles or anti-particles? [link] [comments]  |
| Posted: 13 Aug 2017 04:35 AM PDT I've already read discussions that the 91 volcanoes beneath the antarctic ice sheet might speed up global warming and rising sea levels should any of them erupt. But I'm wondering if the opposite might be true as well. For instance, a one trillion metric tons heavy iceberg drifted from the Larsen ice shelf in july. Could such decreased pressure from the arctic ice trigger volcanic eruptions in the near future? [link] [comments]  |
| Posted: 12 Aug 2017 08:06 PM PDT Can the possibility be ruled out that we have direct ancestors which were larger than human beings? I cannot think of a particular epoch in which this could have occurred. There could perhaps have been a large synapsid in our lineage, or perhaps there was a very large fish. [link] [comments]  |
| Products, such as glue, that are purple but disappear/turn clear--how do they work? Posted: 12 Aug 2017 01:44 PM PDT I've seen several products, including glue, sunscreen, and fabric marking pens, that start out purple, but become invisible as the product dries, is rubbed in, or after some period of time. How does this disappearing purple effect work? Do all these products use the same compounds or mechanism to produce this effect? Why is it purple and not some other color? Can someone explain this at a layman level? [link] [comments]  |
| What is a Vector? What is a Tensor? And how are these two things used in AI and processor design? Posted: 12 Aug 2017 09:27 PM PDT I don't have a math background which makes understanding the concepts of Vectors and Tensors difficult. However I have a strong interest in tech and that makes me curious as to why Nvidia's newest Tesla compute card has tensor math processor cores included, quite a lot of them. There are also several other companies working on processors specific to calculating tensor math, all for use in AI research. That leads to a lot of questions. What exactly is a Vector? The definition is "an object with Direction and Magnitude". Direction is fairly obvious, but how does Magnitude relate to reality? What exactly is a Tensor? I've seen several definitions, including "an object that linearly transforms one Vector into another" and "an object with two Directions and a Magnitude". And finally, how does Tensor math relate to AI research and things like self-driving cars? A note: This should probably have multiple flairs, but I don't think that's possible. [link] [comments]  |
| What changes in the brain causes different people to have varying working memory capacities? Posted: 13 Aug 2017 06:11 AM PDT What I mean by working memory here is when you are doing a mental calculation you keep the numbers involved in memory briefly until the calculation is complete. I read this article in the guardian - Tracy Packiam Alloway: working memory is a better test of ability than IQ. The article suggest that a person's working memory capacity is considered mostly innate. So, some people are able to hold more pieces of data in their mind at the same time. What I am interested to know is what changes in the brain/nervous system (if there are any) that account for this difference. (eg- is a specific region of the brain larger? or [link] [comments]  |
| Is it possible to replace femur with something artificial? Posted: 13 Aug 2017 02:48 AM PDT |
| Posted: 13 Aug 2017 02:31 AM PDT So i know people say "heart attack" when they actually mean a cardiac arrest, but is it actually possible to get one from a jumpscare or is that just a myth because people faint? Or does the brain actually sort of override/inhibit the electrical conduction nodes in the heart? [link] [comments]  |
| If heat rises, why are higher altitudes so cold? Posted: 12 Aug 2017 03:35 PM PDT |
| Why is my facial hair a different texture than my head hair? Posted: 13 Aug 2017 05:47 AM PDT |
| What do we gain by making microchips smaller and smaller over time ? Posted: 12 Aug 2017 05:16 PM PDT They say that every two years microchips and other computer parts get smaller, but shrinking said parts brings up problems that need to be fixed, but what I struggle to understand is why we bother going to such troubles and such lengths to shrink our computer parts in the first place. Wouldn't it make more sense to still research how to concentrate more computing power in a smaller area, but still keep our computer components he same size? [link] [comments]  |
| Do gas giants have a solid core? Posted: 12 Aug 2017 12:39 PM PDT It would make sense that the gravity holding all the gas together would be emanating from something. [link] [comments]  |
| What is happening, on a cellular level, when we stretch? Posted: 12 Aug 2017 03:03 PM PDT |
| Why is there an nth root symbol when you can just write it as an exponent? Posted: 12 Aug 2017 08:54 PM PDT |
| In regard to scientific research, what is a treatment? Posted: 13 Aug 2017 02:30 AM PDT |
| Posted: 13 Aug 2017 02:30 AM PDT |
| In a wood fire, what is hotter and why, the glowing embers or the open flame? Posted: 13 Aug 2017 02:23 AM PDT Extra question. What is the difference between open flame and combustion in embers like charcoal after the flame dies down or a cigarette? [link] [comments]  |
| If lightning struck the ocean, how far away would you have to be to not get electrocuted? Posted: 12 Aug 2017 01:28 PM PDT |
| What keeps food from ‘going down the wrong pipe’ and doesn’t when said event occurs? Posted: 13 Aug 2017 01:55 AM PDT |
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