At what point, specifically referencing Earth, does Euclidean geometry turn into non-Euclidean geometry? |
- At what point, specifically referencing Earth, does Euclidean geometry turn into non-Euclidean geometry?
- Do microwave ovens really leak?? Is this true? I always thought it's a shielded "box"!
- What would Jupiter look like from the surface of Ganymede?
- Many species of birds can see in UV light, but what experiment led to that discovery? And what caused birds to evolve sensitivity to UV light before their plumage was UV reflective?
- What if you took some simple scuba gear, maybe a weight, and applied a hydrophobic layer?
- Why Does The East Sky Turn Red At Sunset?
- Why do Novocain (or dental locla anesthesia) needles need to be so large and in such a sturdy applicator?
- what is the origin of a comet?
- What kind of physiques did prehistoric people have?
- How do the ways particles interact, change above the unification energy of the weak and electromagnetic interaction?
- Does oil filled heater consume oxygen / produce carbon monoxide?
- What invasive species invaded and destroyed ecosystems without the help of humans?
- If objects take an infinite time to fall into a black hole from our frame of reference, then how to black holes gain mass from our frame of reference?
- How did the perturbed orbits of planets/proto-planets in the early solar system become "circularized"?
- Where do animals get sodium in their diet from given that they don't eat salt ?
- When do interference patterns occur and what is the relation between interference and difraction?
- Is the fact that the LHC hasn't discovered supersymmetric particles evidence against string theory?
- What is biological memory?
| Posted: 20 Nov 2019 08:38 PM PST I'm thinking about how, for example, pilots can make three 90degree turns and end up at the same spot they started. However, if I'm rowing a boat in the ocean and row 50ft, make three 90degree turns and go 50ft each way, I would not end up in the same point as where I started; I would need to make four 90degree turns. What are the parameters that need to be in place so that three 90degree turns end up in the same start and end points? [link] [comments]  |
| Do microwave ovens really leak?? Is this true? I always thought it's a shielded "box"! Posted: 20 Nov 2019 07:23 PM PST Found this on YT. Is it legit? Or a hoax? [link] [comments]  |
| What would Jupiter look like from the surface of Ganymede? Posted: 20 Nov 2019 04:23 PM PST I am trying to write a science fiction story, and wish to keep it as hard as I can. Much of the plot centers around a settlement on Ganymede, and I would like to know how Jupiter would appear in the sky from the surface of the moon. [link] [comments]  |
| Posted: 20 Nov 2019 04:26 PM PST |
| What if you took some simple scuba gear, maybe a weight, and applied a hydrophobic layer? Posted: 20 Nov 2019 07:56 PM PST Let's say you put in ear plugs, wore goggles that covered the nose, a diving cap to hold your hair down, took a tank of air, and then sprayed everything in a hydrophobic layer. Would this allow you to go deeper into a body of water than if you just did this without the hydrophobic layer? The earplugs is obviously to counteract the pressure on the ear, goggles for the eyes and nose, where as the rest of the body seems to handle higher water pressures better than these areas, and the cap just to make the hydrophobic layer easier to create. Besides obviously not getting wet, with the weight of the tank, how far down could you walk on the ocean floor beyond the normal? Would this even have an effect? Would you need to bring more weights or would the layer allow you to just slip down? Or does this only seem like a cool idea in my head? [link] [comments]  |
| Why Does The East Sky Turn Red At Sunset? Posted: 20 Nov 2019 02:45 PM PST This picture shows the sky in the East right after sunset. Why is the sky opposite the sunset becoming red? I understand that different wavelengths of light scattering more or less depending on the amount of atmosphere explains the sky being blue and sunsets being red, but I'm having a hard time understanding why the opposite sky is also red. [link] [comments]  |
| Posted: 20 Nov 2019 10:19 AM PST I ask because it seems like almost every other medical needle is not in such an industrial sized injector. Youd think a smaller needle would make it easier to get into the small spaces of the mouth. [link] [comments]  |
| what is the origin of a comet? Posted: 20 Nov 2019 02:48 PM PST I just watched a new video on youtube uploaded by the infographics show. It talked about how there is a newly discovered comet coming towards our solar system and that it came from another star. This comet was caused by some "massive cosmic event." Does there always have to be a massive cosmic event for a comet to pass through our solar system? and would that event have to do with the star dying? Also do comets always come from stars? [link] [comments]  |
| What kind of physiques did prehistoric people have? Posted: 20 Nov 2019 11:14 AM PST So obviously people in prehistory (or even pre-industiral history) had to hunt/farm constantly, so every day would've been a struggle for survival. As a result, they'd obviously have to be very strong and have high endurance, and I've even heard it said that the average prehistoric human was as fit as an athlete is today. Would they look like modern athletes/ body builders though? Obviously, a body builder does specific movements to get a certain look, which I cant imagine would have any practical use back then. Would they even look "muscular", the way we think of it today, or would it all have been covered in stored fat reserves? [link] [comments]  |
| Posted: 20 Nov 2019 02:49 PM PST |
| Does oil filled heater consume oxygen / produce carbon monoxide? Posted: 20 Nov 2019 11:38 AM PST There's a myth around here saying that any kind of direct heating like oil filled heaters or even turning on the AC on hot temperature would consume oxygen and make you suffocate. I tried asking around and googling it but no luck so far. I only got answers from people like me guessing from what they learned in school. I need a scientific answer for this matter. [link] [comments]  |
| What invasive species invaded and destroyed ecosystems without the help of humans? Posted: 20 Nov 2019 04:10 AM PST Like the cats destroyed birdlife in NZ, but only after humans brought them. [link] [comments]  |
| Posted: 19 Nov 2019 07:15 PM PST From wikipedia:
How does this work in terms of us nonetheless observing that black holes do 'consume' matter and gain mass? And conversely, if from our reference frame nothing ever actually falls into the event horizon but approaches it over infinite time, then how does the black hole information theory paradox arise? Do we not then see an imprint of all matter at the edge of the event horizon? [link] [comments]  |
| Posted: 20 Nov 2019 10:34 AM PST For example Jupiter, which is thought to have moved out from the inner solar system via encounters with Saturn. Or the hypothesized Planet 9, which could have been throw out past the Oort Cloud. Or any other body that has been flung by a larger body. It's my current understanding that these perturbations would produce a very elliptical orbit, with the perturbed body still coming back down into a similar AU. For instance a spacecraft must perform a burn at the highest point in its orbit to circularize. But what mechanism causes a body flung out into a distant location to stay there? [link] [comments]  |
| Where do animals get sodium in their diet from given that they don't eat salt ? Posted: 20 Nov 2019 02:46 AM PST |
| When do interference patterns occur and what is the relation between interference and difraction? Posted: 20 Nov 2019 06:25 AM PST Hi, I was wondering if someone could explain to me where interference patterns come from and how do they relate to electron diffraction. I understand the phenomenom of diffraction and know the difference between the two types (constructive and destructive) but I don´t get the way in which the waves must cross over to create the interference pattern. Also, I came across interference patterns that arose from electron diffraction by graphite and I was wondering how electron diffraction connects to interference. Thanks to anyone who takes the time to help me on this! [link] [comments]  |
| Is the fact that the LHC hasn't discovered supersymmetric particles evidence against string theory? Posted: 20 Nov 2019 09:01 AM PST AFAIK, all current versions of string theory predict the existence of supersymmetric particles, and the LHC doesn't seem to have found any. I remember watching a TED talk from before the LHC was turned on, in which Brian Greene seemed very excited at the possibility that it could detect supersymmetric particles. Does this indicate that string theory is probably wrong? Do string theorists have an explanation for why the LHC wouldn't find any supersymmetric particles? [link] [comments]  |
| Posted: 20 Nov 2019 08:55 AM PST On a molecular level, what is "memory"? Mechanically speaking? Is it an arrangment of molecules? A particular sequence of synaptic transmission? How is the data stored within neurons? Speaking mostly about biological lifetime/cognitive memory rather than DNA codes. [link] [comments]  |
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