How can a device on an aircraft or car be electrically grounded? |
- How can a device on an aircraft or car be electrically grounded?
- When you build a tolerance to alcohol, does your body get better at removing it, better at functioning with it, or just better at not feeling it?
- Would a helium balloon rise faster in air or water?
- Why is the error term in the Störmer-Verlet method O(Δt²) and not O(Δt³)?
- If mouthwash supposedly kills 99% of the bacteria then wouldn't this contribute to creating mouthwash resistant bacteria similar to how antibiotics use creates superbugs?
- How does critical mass in an atomic bomb work?
- Did humans and fish came from the same biological organism (like the saying "we all come from the sea") or is it possible that life developed independently in the oceans and on land?
- Magnets stick together one way and repel the other. If you had something that could clamp some big magnets together while they were trying to repel. Overtime is there any reaction?
- Are anti-photons a thing?
- Does what language you’re raised with change your behaviour?
- How will the James Web Space Telescope orbit AROUND L2 lagrange point?
- Is it possible for something to reach quadruple point? (Solid, liquid, gas, and plasma)
- Will a beam of sound moving perpendicular to gravity begin to rise, descend, or continue straight?
- Can someone explain what Bose-Einstein condensate is? How does it differ from other forms of matter in regards towards physical properties?
- Is it possible to use pacemaker cells for neural stimulation?
- Approximately how fast is Sol traveling relative to the center of the Milky Way galaxy?
- Does the Earth's orbit decay into the sun?
- What is the smallest physical size that a flame can be?
- How is age of our universe calculated if our solar system was born after the Big Bang? Thanks
- I have heard many times that we can't invent images of human faces so everyone we see in a dream is someone we've seen somewhere in real life. How do we know this?
- If Yellowstone decided to finally go supervolcano on us, how much forewarning, if any, would the planet give us? Would it be instantaneous, or would we have days/weeks/months to prepare? What would any such forewarning look like?
- What has changed in drug use over the past decades?
- What is the part of the brain, and how does it function, that allows us to process and repeat units of time (like in a beat)?
| How can a device on an aircraft or car be electrically grounded? Posted: 11 Mar 2019 10:38 PM PDT |
| Posted: 11 Mar 2019 07:30 PM PDT |
| Would a helium balloon rise faster in air or water? Posted: 11 Mar 2019 09:31 PM PDT The buoyant force in water would be greater but so would the drag. Anyone know the answer??? [link] [comments]  |
| Why is the error term in the Störmer-Verlet method O(Δt²) and not O(Δt³)? Posted: 12 Mar 2019 06:56 AM PDT If positions at t + Δt are: r(t+Δt) = r(t) + v(t) + ½a(t)Δt² + ⅙b(t)Δt³ + O(Δt⁴) and for t - Δt the positions are given by: r(t-Δt) = r(t) - v(t) + ½a(t)Δt² - ⅙b(t)Δt³ + O(Δt⁴) And the subtraction of both equations results in r(t+Δt) - r(t-Δt) = 2v(t) + ⅓b(t)Δt³ + O(Δt⁴) Which is the same as r(t+Δt) - r(t-Δt) = 2v(t) + O(Δt³) Why is the velocity given by v(t) = [r(t+Δt) - r(t-Δt)] / 2Δt + O(Δt²) And not v(t) = [r(t+Δt) - r(t-Δt)] / 2Δt + O(Δt³) Thanks [link] [comments]  |
| Posted: 12 Mar 2019 04:58 AM PDT And does this cause any long term concerns when it comes to using mouthwash? [link] [comments]  |
| How does critical mass in an atomic bomb work? Posted: 12 Mar 2019 06:41 AM PDT If all the atoms in a small block of Uranium are Uranium-235, what does it matter how much is in there for a chain reaction to occur? [link] [comments]  |
| Posted: 11 Mar 2019 09:06 PM PDT P.s.- sorry if I messed up some of the "terms" I'm no expert. 🙈 [link] [comments]  |
| Posted: 12 Mar 2019 04:25 AM PDT |
| Posted: 11 Mar 2019 10:26 PM PDT If so could you have a flash light that emits darkness? [link] [comments]  |
| Does what language you’re raised with change your behaviour? Posted: 12 Mar 2019 04:46 AM PDT If you were raised with English, would you have a higher chance of being more aggressive, timid or anything like that? Does a language that could have more words with more aggressive connotations lead to someone with that ingrained in their personality, and if they were to learn a second language, could it bleed into that? I'm not sure if I've worded my question properly because the though just appeared in my mind. [link] [comments]  |
| How will the James Web Space Telescope orbit AROUND L2 lagrange point? Posted: 11 Mar 2019 08:15 PM PDT I've been reading up on the James Web Space Telescope and how it will orbit around the L2 point. I'm familiar with lagrange points and the balance of gravity which allows objects to be stable or meta-stable to have the same orbital speed around the sun as the Earth does while being in a different orbit "elevation", but how will the telescope orbit around the L2 point when there's not actually any attractor there? As I understand it, the L1, L2, and L3 points are the meta-stable ones, akin to a bowling ball being able to sit on top of a very small plateau on top of a peak. Move too far from the L plateau, and the ball will roll down the mountain into the nearest gravity well. The JWST orbiting around the L2 at a distance seems to me like it would be circling the mountain at a constant elevation contour line below the level of the plateau, without ever rolling down hill. In contrast, the L4 and L5 points, being stable points, would be more like a saddle bowl on the side of the mountain with a small lake in it. The bowling ball could orbit around those lakes in the bowl with centripetal force keeping them at a stable elevation, ignoring friction. Is it the same phenomenon with the L2 point? Is it actually a lake at the top of the mountain with its own little bowl? I suppose that would look more like a volcanic crater, but I digress. In such a case the ball would be rolling around the rim of the crater, but would not have to stay in the center of a small plateau. But being that case, how would the L2 be meta-stable and any different from the stable L4 and L5? Can anyone explain or point me to a good source? I've not been able to find anything Googling, but having the right term for the phenomenon might help. Thanks! [link] [comments]  |
| Is it possible for something to reach quadruple point? (Solid, liquid, gas, and plasma) Posted: 11 Mar 2019 10:14 PM PDT I seen a video where a liquid was simultaneously changing to solid and gas (called triple point) and made me curious to know if it's possible for it to be plasma also. [link] [comments]  |
| Will a beam of sound moving perpendicular to gravity begin to rise, descend, or continue straight? Posted: 12 Mar 2019 05:40 AM PDT |
| Posted: 12 Mar 2019 08:14 AM PDT I have attempted to research this subject online, but most resources are very vague. Thanks for the help! [link] [comments]  |
| Is it possible to use pacemaker cells for neural stimulation? Posted: 12 Mar 2019 07:49 AM PDT I mean maybe pacemaker cells would have to be altered to do the same therapeutic work neural stimulation devices do. But pacemaker cells implanted properly I'd imagine would have less complications and not need battery changes. I'm just wondering if theoretically pacemaker cells could have medical value after alteration to stimulate that brain and spine for example. Thanks [link] [comments]  |
| Approximately how fast is Sol traveling relative to the center of the Milky Way galaxy? Posted: 11 Mar 2019 04:50 PM PDT |
| Does the Earth's orbit decay into the sun? Posted: 11 Mar 2019 11:36 PM PDT I want to know if the earth would eventually fall into the sun assuming the sun doesn't go super nova on us. Does the earth's orbit decay like satellites and if so by how much and how (if) it affects us. [link] [comments]  |
| What is the smallest physical size that a flame can be? Posted: 12 Mar 2019 05:52 AM PDT |
| How is age of our universe calculated if our solar system was born after the Big Bang? Thanks Posted: 11 Mar 2019 10:07 PM PDT How is the age of our universe calculated if our solar system was born after the Big Bang? [link] [comments]  |
| Posted: 12 Mar 2019 05:21 AM PDT |
| Posted: 11 Mar 2019 10:06 AM PDT |
| What has changed in drug use over the past decades? Posted: 12 Mar 2019 01:05 AM PDT As someone who hasn't lived in the 70s and 80s, I often see it portrayed as being an age of parties and drugs. Is anything known about changes that happened in the drug scene over the past decades (mainly interested in the european scene)? Did drug use increase or decrease? Did drug use stay recreational or did it become more self-medicational? Did the variety used increase or did a lot of kinds of drugs disappear from the streets? [link] [comments]  |
| Posted: 11 Mar 2019 10:39 PM PDT Basically the title. I (and everyone else) can move my hand back and forth, and repeat that motion forever, with the same unit of time elapsing between each movement. That was a really wierd way of describing the motion of a conductor, with the time elapsing between the two peaks of the swing of their arm being the same. The same can be done by vocalizing, or merely in my head. At first I assumed it had something to do with counting (and it still might idk), but I don't have to assign any unit value (like a second) to it. I can arbitrarily choose a length of time, without even knowing what it would be in seconds, yet I can swing my hand to that exact unit of time over and over again. I can do it for any length, and can alternate it (1 second then 3 seconds then 1 second continuing). Again this can also be spoken or merely thought. What is the part of the brain that allows me to determine a period of time, recognize it as such, and maintain a repeating pattern where I am aware when each period of that time elapses? I first assumed it had something to do with like a base time, but I can choose or be shown any length of time and can repeat it in my head rhythmically. Where in the brain is this process? How does it work - is there a neuron that holds and releases charge to that period of time, like a circuitboard? How can I identify a unit of time, memorize it, and consistently recognize when it elapses? How does that function? [link] [comments]  |
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