Are oceans necessary for a terrestrial planet to have sustained tectonic plate activity? Would a planet that was entirely covered by a single massive ocean have tectonic plate activity? |
- Are oceans necessary for a terrestrial planet to have sustained tectonic plate activity? Would a planet that was entirely covered by a single massive ocean have tectonic plate activity?
- How come, when we rub our eyes hard enough we see those weird colors and patterns?
- What is multiplication ?
- How do we get Vitamin D from the sun? Is it like photosynthesis in any way?
- [Biology] Are there people who can see further into the ultraviolet or infrared spectrum than the average person?
- Why is hemisphererectomy possible but some brain tumors are inoperable?
- When We Visualize Something, Does Our Brain Create One Image, or Two, as in One for Each Eye?
- Why isn't there a general formula for solving quintic polynomials like there is for quadratics, cubics and quartics?
- How do antibiotics destroy foreign bacteria without harming our own body as well?
- Why must neutrons in a nuclear reactor be slowed down to fission U-235 whereas in a nuclear bomb they do not?
- Are there circumstances where scientist and pharmaceutical companies don't have to go through the FDA to release a drug?
- Why is non-dairy coffee creamer so flammable?
- Do different shaped parachutes with similar surface area have the same travel time?
- Taxonomy: How are complicated phylogenetic trees arranged?
- What is the difference between a thermal camera and a nightvision camera? Both picture the IR-Spectrum, is it the same?
- Gravity keeps the planet in orbit, but what keeps the planet moving?
- Can crocodiles mate with alligators?
- What is the difference between Vitamin D from the Sun and Vitamin D from food sources?
- Did the first stars have planets?
- Basically what is keeping air from flooding to empty space?
- What is the fastest possible speed of a helicopter and why are they limited by this speed?
- How do cuttlefish know what color and texture to change to considering that they are color blind?
- Why is it that low energy neutrons can cause a nuclear fission reaction only if the atom that are reacting with has an odd mass (protons + neutrons) number?
| Posted: 08 May 2017 08:43 AM PDT Venus and Mars don't seems to have active tectonic plates (anymore), they also don't have oceans (anymore), is this a coincidence or are these facts related? I have heard discussions of hypothetical 'ocean planets' where a terrestrial body might be covered with single all-enveloping ocean several 100s of km thick. Would such an ocean have an effect on a planet's tectonic activity? [link] [comments]  |
| How come, when we rub our eyes hard enough we see those weird colors and patterns? Posted: 09 May 2017 04:30 AM PDT |
| Posted: 09 May 2017 05:56 AM PDT I was interviewing for a technical position, and in my resume I had written Mathematics as a hobby. Interviewer: Ah! So, your hobby is Mathematics. That's different. Tell me more about it. Me: Sir, I have been fascinated by Mathematics since I was a child. This crazy interest had led me to develop a very deep understanding and appreciation for the subject. Besides I have an intuition for Mathematics. I understand even the most complicated Mathematical concepts easily and intuitively. Interviewer: That's good. I will ask you something extremely simple. In fact, it is so fantastically simple that you probably learnt in first grade. Tell me what is the meaning of multiplication. Me: It's repeated addition. For eg. 5 X 3 = 5 + 5 + 5. Add 5 three times. Interviewer: Okay, then tell me how would you explain e x π ?How do you add something, (π)times? I opened my mouth. And then closed it. Then opened it. Then closed it again. Then came the shock; and the embarrassment; the realization that I didn't know What multiplication means!!! [link] [comments]  |
| How do we get Vitamin D from the sun? Is it like photosynthesis in any way? Posted: 08 May 2017 05:05 PM PDT |
| Posted: 09 May 2017 04:02 AM PDT |
| Why is hemisphererectomy possible but some brain tumors are inoperable? Posted: 09 May 2017 06:39 AM PDT If it is possible to remove one half of the brain and the person still lives (although he personality could be majorly altered depending if the removed half was dominant); how large are inoperable brain tumors then compared to this. And what makes them inoperable? [link] [comments]  |
| When We Visualize Something, Does Our Brain Create One Image, or Two, as in One for Each Eye? Posted: 08 May 2017 07:07 PM PDT |
| Posted: 08 May 2017 03:47 PM PDT |
| How do antibiotics destroy foreign bacteria without harming our own body as well? Posted: 08 May 2017 07:44 PM PDT |
| Posted: 08 May 2017 06:19 PM PDT |
| Posted: 08 May 2017 08:35 AM PDT (Not sure if the FDA is the organization that handles this type of thing but bare with me here) I'm talking in extreme circumstances. Like the human race is dying alarmingly fast, and if someone doesn't come up with a cure/vaccine soon we're headed for extinction. (i'm being very dramatic here but i'm getting to the point) In an instance where people are dying rapidly and science does come up with some drug that helps, i know that trials and testing take many years. But in the event the human race doesn't have that much time, can pharmaceutical companies release the drug without following the "necessary procedures"? [link] [comments]  |
| Why is non-dairy coffee creamer so flammable? Posted: 08 May 2017 03:39 PM PDT |
| Do different shaped parachutes with similar surface area have the same travel time? Posted: 08 May 2017 05:40 PM PDT If i drop a rectangular and a circular parachute with the same SA, from the same height and at the same time, will they both land on the ground at the same time (assuming everything is constant)? [link] [comments]  |
| Taxonomy: How are complicated phylogenetic trees arranged? Posted: 09 May 2017 06:33 AM PDT I'm not sure how to ask this. I've been reading about extinct animals and trying to compare their relation to modern animals (e.g Dimetrodon to Humans) via phylogenetic trees. However, the taxonomic order (i.e. phylum->class->order...) is stretched to superphylum and infraclass and frequently a class within another class (e.g. Mammalia within Synapsida or Aves within Reptilia). How is this order determined? Shouldn't something such as Aves be a subclass within Reptilia or Reptilia redefined as a class to repeat a taxonomic rank? [link] [comments]  |
| Posted: 09 May 2017 02:33 AM PDT |
| Gravity keeps the planet in orbit, but what keeps the planet moving? Posted: 08 May 2017 07:59 PM PDT I always see a demo on how gravity works by using a trampoline with a heavy object in the middle as the sun and less heavier objects as the planets. The small objects will be thrown into trampoline and we can clearly see that they are orbiting around the heavier object. But in these demos, the smaller objects will stop moving and thus fall into the heavy object, so my question is what is something that keeps the planet moving endlessly? [link] [comments]  |
| Can crocodiles mate with alligators? Posted: 08 May 2017 02:44 PM PDT I've seen lions and tigers mating. I've seen horses and donkeys mating, but can a crocodile and alligator mate? They seem very similar like how tigers and lions are. I don't expect to get much of an answer, but it would be much appreciated. [link] [comments]  |
| What is the difference between Vitamin D from the Sun and Vitamin D from food sources? Posted: 08 May 2017 03:00 PM PDT How do the two vitamin D sources compare and contrast? [link] [comments]  |
| Did the first stars have planets? Posted: 08 May 2017 03:41 PM PDT |
| Basically what is keeping air from flooding to empty space? Posted: 09 May 2017 01:55 AM PDT I know gravitational force is keeping things on earth. But since the atoms at the very end of atmosphere are subject to the lovest gravitational impact, what keeps them "inside" or are some gas eventually being released into the vacuum? Thats sounds unlikely because if thats the case, shouldn't we end up with no atmosphere eventually? [link] [comments]  |
| What is the fastest possible speed of a helicopter and why are they limited by this speed? Posted: 08 May 2017 05:28 PM PDT This topic came up when My friend and I were discussing supersonic travel. Jets were common, but why not helicopters? [link] [comments]  |
| How do cuttlefish know what color and texture to change to considering that they are color blind? Posted: 08 May 2017 04:19 PM PDT |
| Posted: 08 May 2017 01:54 PM PDT |
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