Is there an element/compound that is denser as a gas than it is as a solid? |
- Is there an element/compound that is denser as a gas than it is as a solid?
- If plant life existed on mars in the past, would there still be coal/oil under the surface today?
- Since the QT interval represents the depolarization AND repolarization of the ventricles, is it linearly correlated with heart rate?
- Are there numbers outside of C? If so, is there an ensemble including every other number ensemble we know?
- Could roadways contribute to rising global temperature, to a significant degree?
- What makes a nuclear reaction a direct reaction or a compound reaction (non-resonant vs resonant)?
- If dirt on Earth is called "earth", what is dirt on Mars called?
- If movement is relative, and F=ma, does that mean that force is also relative?
- Are we able to see black holes? If so, can we see the Milky Way's black hole (from earth/telescope)?
- What's happening on a molecular level that makes pasta so sticky?
- If I were placed into a hollow sphere with super-massive walls, would I experience time dilation but not gravity?
- Can you tell if two chemicals will react just by their names?
- Why do Galaxies look like spirals?
- Are there any ecosystems relatively immune to global warming?
- Why does matter accreting onto a white dwarf cause it to go nova, and not just "reignite" into a regular star again?
- For those that can lipread, is it possible to distinguish regional or international accents by using solely lipreading?
- Do metals/alloys resonate electrically like quartz and other crystals do?
- How do we know that young earth was hot and molten?
- Do the lack of BSL-3 facilities worldwide increase the risk of a worldwide epidemic? Why exactly do we not have more of these facilities?
| Is there an element/compound that is denser as a gas than it is as a solid? Posted: 30 Sep 2016 08:29 PM PDT |
| If plant life existed on mars in the past, would there still be coal/oil under the surface today? Posted: 30 Sep 2016 07:03 PM PDT |
| Posted: 30 Sep 2016 07:43 PM PDT |
| Posted: 01 Oct 2016 01:32 AM PDT Just started learning about complex numbers in math class in high school, and asked my teacher if C included all the numbers we know, and she told me it doesn't, but she can't really tell me more about it. I asked the same question to my brother who's in studying math in university, and he told me the same thing. So, what are the non-complex number ensembles, and is there a number ensemble that includes all the complex and non-complex numbers? [link] [comments]  |
| Could roadways contribute to rising global temperature, to a significant degree? Posted: 30 Sep 2016 01:12 PM PDT I've heard the theory that enough solar energy hits United States roadways to power all of the America's energy needs. To me it seems this black surface area absorbs a tremendous amount of heat energy. Whereas it would otherwise be converted to chemical energy (plants), reflected back to space (snow), or halfway reflected (dirt, other). While certainly not the largest contributor, can this be a factor for rising global temperature? [link] [comments]  |
| What makes a nuclear reaction a direct reaction or a compound reaction (non-resonant vs resonant)? Posted: 30 Sep 2016 07:33 PM PDT According to this website, nuclear reactions can be classified as direct or compound. I understand the distinction between the two, but what causes a given reaction to direct/compound? Can the reaction's type be predicted without performing the reaction? [link] [comments]  |
| If dirt on Earth is called "earth", what is dirt on Mars called? Posted: 30 Sep 2016 11:49 AM PDT |
| If movement is relative, and F=ma, does that mean that force is also relative? Posted: 30 Sep 2016 05:42 PM PDT |
| Are we able to see black holes? If so, can we see the Milky Way's black hole (from earth/telescope)? Posted: 30 Sep 2016 05:45 PM PDT |
| What's happening on a molecular level that makes pasta so sticky? Posted: 30 Sep 2016 04:39 PM PDT |
| Posted: 30 Sep 2016 05:27 PM PDT |
| Can you tell if two chemicals will react just by their names? Posted: 30 Sep 2016 05:15 PM PDT Im curious if there is a general method in determining whether a chemical compound is compatible or not with another simply through means of their names. For example would all silicones melt in all esters? Would different esters be compatible simply because they are both esters? Would fluorosilicone be affected by silicone based fluids? Etc Etc. Please explain simply, only have basic chemical knowledge. Thanks [link] [comments]  |
| Why do Galaxies look like spirals? Posted: 30 Sep 2016 07:50 AM PDT I'm pretty sure that it actually spirals because the center is rotating faster due to being closer to the core, so its a spiral as opposed to more of a star. But I'm not ever sure if that's true. My main question is why do they get that sort of shape in the first part, shouldn't the settle as more of a disk? What causes the arms to form? [link] [comments]  |
| Are there any ecosystems relatively immune to global warming? Posted: 30 Sep 2016 11:12 AM PDT |
| Posted: 30 Sep 2016 07:01 PM PDT |
| Posted: 30 Sep 2016 09:56 AM PDT |
| Do metals/alloys resonate electrically like quartz and other crystals do? Posted: 30 Sep 2016 12:05 PM PDT I know that quartz crystals can be made to oscillate electrically, and for this reason are used as high-Q filters for the feedback paths of electrical oscillators. Is there a similar resonant property for metals (obviously not piezoelectric)? I know that the quartz resonant frequency is influenced by its dimensions, so I'd be looking for something more intrinsic to the metallic structure itself (independent of overall geometry). For instance, if I am presented with a sample claimed to be 70% gold, with the remainder being copper, is there any way to test that electrically? Something like "The impedance of such an alloy would have a peak/trough at 770MHz. The actual peak was measured at 760MHz, indicating only 60% gold." [link] [comments]  |
| How do we know that young earth was hot and molten? Posted: 30 Sep 2016 11:44 AM PDT The Rosetta mission provided a lot of evidence about how the young solar system formed, including the aggregation of dust particles to produce larger objects. They also discussed the source of earth's water. Some research suggests it must be extra-terrestrial since the young earth was hot and molten and water would have boiled off. But I can't find what the evidence is for a hot molten young earth (except perhaps after the proto-moon collision). How do we know the earth didn't simply form by the cold accretion of particles from the nebula, eventually heating the core, but not the surface? Related, if everything formed from the planetary nebula, why is the H-D ratio different in different objects? [link] [comments]  |
| Posted: 30 Sep 2016 07:48 AM PDT |
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