Can you determine the cause of a headache from the region of the head it is affecting? |
- Can you determine the cause of a headache from the region of the head it is affecting?
- How can objects like a piano be completely black and at the same time highly reflective?
- Are there caves on other planets in our solar system?
- If waste from nuclear power generation is radioactive, why does it get disposed of and isolated, instead of used as fuel?
- If water is transparent, why are the clouds white?
- When electrons jump from one atomic orbital to the next, how fast do they move?
- How can we tell that a star is a certain color because of the Doppler Effect or because it burns at a certain temperature?
- How are Power Grids affected by Solar Flares?
- What makes gold, gold in colour?
- How are electronics in space grounded?
- Why are triangles, squares, and hexagons the only shapes that can tesselate?
- How is a prime number as big as 2^(74'207'281) − 1 found?
- Could sea creatures that live at great depths survive at 1 atm?
- Are precious gemstone/rare mineral sites mostly found by accident?
- How do you know when to draw functional groups as axial vs equatorial for chair configurations?
- What does 'locality' mean in terms of quantum physics?
- How do space craft that explore beyond conventional/existing frames of reference for navigation create new frames of reference as they explore?
- Why do large animals like horses not suffer from the same bone and joint problems that large dogs experience?
- [Physics] How does relativity explain ferromagnetism?
| Can you determine the cause of a headache from the region of the head it is affecting? Posted: 18 Oct 2017 09:29 AM PDT |
| How can objects like a piano be completely black and at the same time highly reflective? Posted: 19 Oct 2017 03:16 AM PDT Things are black because they absorb all the wavelenghts, but in a shiny black piano it also reflects the light like a mirror. [link] [comments]  |
| Are there caves on other planets in our solar system? Posted: 18 Oct 2017 09:08 PM PDT |
| Posted: 18 Oct 2017 03:34 PM PDT |
| If water is transparent, why are the clouds white? Posted: 19 Oct 2017 04:25 AM PDT |
| When electrons jump from one atomic orbital to the next, how fast do they move? Posted: 18 Oct 2017 02:13 PM PDT Electrons can only exist in defined energy levels, and cannot exist in an intermediate state. This seems to imply that the change is instantaneous. When an electron changes atomic orbitals, can it be said to have 'moved', and if so, how fast is that 'movement' if the jump is instantaneous? [link] [comments]  |
| Posted: 18 Oct 2017 03:04 PM PDT Hi. I am reading A Brief History of Time by Stephen Hawking and he states in Chapter Three that we can tell whether a star is moving away or towards us from its color. A redder star means it is moving away from us while a bluer star is moving towards us. I also know that a star's color also represents its temperature as the blue stars are hotter than the red stars. My question is how can we tell if a star is blue hot even if it is moving away from us and vice versa? Are there other ways we can differentiate the data given to us from sensors illustrating that? Thanks for your time. [link] [comments]  |
| How are Power Grids affected by Solar Flares? Posted: 18 Oct 2017 04:42 PM PDT How does energy from the sun cause power outages on earth? What does this have to do with earth's magnetic field? [link] [comments]  |
| What makes gold, gold in colour? Posted: 18 Oct 2017 12:25 PM PDT What causes the yellow colour of gold? While most metals in their reduced state are effectively colourless, gold (and copper) have colour beyond just being reflective. There are no things like organic chromophores in a metal, and the transitions that give metal salts their colours shouldn't be applicable in the neutral metal, as far as I understand. So, what makes gold (and copper, etc) special amongst metals? [link] [comments]  |
| How are electronics in space grounded? Posted: 18 Oct 2017 08:18 AM PDT |
| Why are triangles, squares, and hexagons the only shapes that can tesselate? Posted: 18 Oct 2017 03:32 PM PDT Why can only these regular shapes (with equal angles at each vertex) form a continuous grid? I understand that the angles don't allow other shapes to do this, but I would like to understand it from a more conceptual and visual perspective. [link] [comments]  |
| How is a prime number as big as 2^(74'207'281) − 1 found? Posted: 18 Oct 2017 07:05 PM PDT So how exactly did the team that found this prime number figure it out? How were the computers (assuming they used computers) even able to compute a number that big? EDIT: So found out they use a software called GIMPS, what is that exactly and how does it find prime numbers? [link] [comments]  |
| Could sea creatures that live at great depths survive at 1 atm? Posted: 18 Oct 2017 12:13 PM PDT Do they have higher internal pressure to counter the external pressure on their bodies? If so, would this cause then to swell and possibly "lyse" at the surface? [link] [comments]  |
| Are precious gemstone/rare mineral sites mostly found by accident? Posted: 18 Oct 2017 08:05 PM PDT I've been trying search on google about how dig-sites for precious gems are discovered. I'm not really finding any useful information. I've tried rephrasing my question but I'm not really coming up with anything. Are there methods for locating gemstone deposits? Or can we at least narrow it down pretty well? Or is it more or less just blind luck that someone inadvertently comes across a find, and boom you have a digging site? I'm sure there's some geological clues that we can use, I'm just wondering how accurately we can guess where we might find certain gems or precious minerals. And to add to that, I'm curious as to where I can do my own reading on the subject. [link] [comments]  |
| How do you know when to draw functional groups as axial vs equatorial for chair configurations? Posted: 18 Oct 2017 07:31 PM PDT I'm learning about chair conformations for cyclohexanes and, frankly, my professor sucks at explaining. My main inquiry is, how do you know when to draw a functional group as axial vs equatorial? In the link below, there is a methyl group in the axial position and after the flip, it is in the equatorial. I understand how the flip works, but why is the methyl not equatorial in the first position? [link] [comments]  |
| What does 'locality' mean in terms of quantum physics? Posted: 18 Oct 2017 07:28 PM PDT Typically when I don't understand something in physics, it's an equation. While I'm not saying I think quantum physics should be easily understood, but one quality that really perplexes me is when variables are said to be 'local' or 'non-local'. What does this mean, and why is it not a numerical value? Can you explain it in layman's terms? [link] [comments]  |
| Posted: 18 Oct 2017 11:07 PM PDT |
| Posted: 18 Oct 2017 06:36 AM PDT One might think that bones are bones and convective tissue is connective tissue. Is it something to do with density, or the overall structure? Perhaps a better comparison would be tigers. They have more similar weight bearing characteristics. Do old tigers get arthritis? If not, why not? Could the dog issues be addressed with selective breeding, or is there something inherently different about their tissues? [link] [comments]  |
| [Physics] How does relativity explain ferromagnetism? Posted: 18 Oct 2017 12:09 PM PDT I'm familiar with the relativistic explanation of how moving charges create what appears to be a magnetic field to an observer. But how does it explain permanent magnetism? I've been curious about this. Looking it up in my physics text from undergrad just gives me the old thing about electrons as point charges circulating around their nuclei, analogous to a current in a Wire. But that isn't physically true... [link] [comments]  |
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