When describing an amount of space, we call it an "area" or "volume." When describing an amount of time, we call it a "duration." What would we call an amount of spacetime, and what would that imply? |
- When describing an amount of space, we call it an "area" or "volume." When describing an amount of time, we call it a "duration." What would we call an amount of spacetime, and what would that imply?
- Does Einstein's theory of relativity connect electric and magnetic fields?
- How were they able to train the brain to recover from paralysis using VR?
- How Much Information can the Observable Universe Contain?
- What is in the surface ice of Ganymede?
- How durable could a razor blade be made?
- If Earth had rings like Saturn would the night time be significantly brighter due to reflection from the Sun?
- Why does an egg become solid when heated up?
- How does temperature-dependent sex determination work? Wouldn't the embryos already contain XY/XX chromosomes?
- Is it a coincidence that the first four planets nearest to the sun are all much smaller then the four other planets?
- What are the differences between interstellar space and intergalactic space?
- How does one measure sudden deceleration, such as with a vehicle hitting a wall? At what precise point or event does the beginning of the deceleration period begin and when does it effectively end?
- Are there applications of action principles and Noether's theorem outside of fundamental physics?
- How does fluid loss affect cognitive ability?
- If friction is independent of area of contact, why do cars with wider tires have more traction?
- How is the Riemann Hypothesis related to prime number distribution?
- How is water pressure generated by a distribution company? How is pressure is increased to individual fixtures?
| Posted: 14 Aug 2016 01:20 AM PDT |
| Does Einstein's theory of relativity connect electric and magnetic fields? Posted: 14 Aug 2016 01:37 AM PDT |
| How were they able to train the brain to recover from paralysis using VR? Posted: 13 Aug 2016 07:43 AM PDT I was blown away by this article over on /r/virtualreality. It looks like a team from Duke were able to train subjects with paralysis using VR headsets each day to slowly allow them to recover some(?) movement/sensation. Even if it was a small amount it is stil really impressive, but what I don't understand is "how" this works? Does this only work for certain types of paralysis? (i.e. if the spinal cord is severed surely there is no chance of any repair without surgery/physical treatment?) If this works, could it be rolled out without the need for a treatment team? i.e. an app + headset would allow anyone who fits the criteria to benefit? (This is my first reddit post so be gentle) [link] [comments]  |
| How Much Information can the Observable Universe Contain? Posted: 14 Aug 2016 02:57 AM PDT If we interpret the observable universe as some kind of data-storage operating at the smallest scale possible, how much information could it theoretically be able to store, assuming that we have infinitely much energy at our disposal to express information? Edit: English [link] [comments]  |
| What is in the surface ice of Ganymede? Posted: 14 Aug 2016 04:33 AM PDT How does the ice react to the intense temperature changes? [link] [comments]  |
| How durable could a razor blade be made? Posted: 13 Aug 2016 01:45 PM PDT The web is rife with stories of how the metal (I presume it is steel) used for most commercial razor blades is designed with planned obsolescence in mind, with the intent of selling as many blades as possible to consumers. I have the following questions: 1 - is this "common wisdom" demonstrably true? 2 - If so, how durable could a common razor blade be made if one ditched the philosophy of planned obsolescence and aimed for maximum durability instead? What kind of metal would be best adapted to produce durable blades which remain sharp and effective as long as possible, and what would it's composition and properties be? [link] [comments]  |
| Posted: 13 Aug 2016 02:41 PM PDT I just read this post on /r/interestingasfuck and seeing the ring so bright over Washington made me question if the rings would light the Earth like the light from a full moon does. It probably depends on the distance the debris in the ring are from Earth, so assume the ratio of Saturn's rings from its surface are the same in this scenario. Would the Earth be lit significantly brighter by the reflected light at night? Or are the rings too close to the surface to catch the light of the Sun at night? Also bonus question, would there be a noticeable shadow on the surface from the rings? Or would the light be diffused enough over the distance so that no shadows are able to be defined? Thanks. [link] [comments]  |
| Why does an egg become solid when heated up? Posted: 14 Aug 2016 08:00 AM PDT If everything becomes a liquid then a gas when it gets heated enough then why does an egg become solid when cooked? No other food that comes in my mind does that. [link] [comments]  |
| Posted: 13 Aug 2016 03:14 PM PDT In some species, such as amniotic reptiles such as the alligator species, temperature plays a key role in determining the sex of the offspring. How does this phenomenon work? Surely the developing animals already have the genetic material needed to decide their sexes? [link] [comments]  |
| Posted: 13 Aug 2016 01:40 PM PDT |
| What are the differences between interstellar space and intergalactic space? Posted: 13 Aug 2016 04:25 PM PDT If dark energy is popping into existence in intergalactic space and causing the accelerating expansion of the universe, why doesn't this happen in interstellar space within galaxies? [link] [comments]  |
| Posted: 13 Aug 2016 07:10 AM PDT I saw another post about some race car having undergone about 200g of deceleration when it slowed from ~100mph to 0 in 2 seconds. It seems like the deceleration itself would even have some variation to it over time, as leading material crumpled and slowed the following material. [link] [comments]  |
| Are there applications of action principles and Noether's theorem outside of fundamental physics? Posted: 13 Aug 2016 09:42 AM PDT Has anyone run across the use of action principles and Noether's theorem as mathematical modeling tools outside of fundamental physics? Perhaps in areas like engineering, biology or even economics? [link] [comments]  |
| How does fluid loss affect cognitive ability? Posted: 13 Aug 2016 06:01 AM PDT Earlier, I saw this TIL in /r/formula1:
However I can't find a source that shows this 40% figure, and I only found a single study that talks about cognitive ability loss after dehydration. Anyone here knows more? [link] [comments]  |
| If friction is independent of area of contact, why do cars with wider tires have more traction? Posted: 13 Aug 2016 06:55 PM PDT |
| How is the Riemann Hypothesis related to prime number distribution? Posted: 12 Aug 2016 11:34 PM PDT Whenever I hear about the Riemann Hypothesis I hear it is related to prime number distribution. But how is it so? Thanks! P.S.: Numberphile fan here! [link] [comments]  |
| Posted: 13 Aug 2016 04:33 AM PDT Since the water to comes out in higher pressure when the faucet is loosened, this means there is an excess of water pressure that is being resisted by the individual valves. 1) What do companies do to increase pressure 2) If it relies on an elevated reservoir, why doesnt the pressure decrease when multiple valves are open 3) How is the pressure increased with individual fixtures like showers, bidets etc. [link] [comments]  |
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