Why does a hair come back if I pull it out by the root? What's causing my body to say, "Oh, I remember there used to be a hair there, better regrow one." |
- Why does a hair come back if I pull it out by the root? What's causing my body to say, "Oh, I remember there used to be a hair there, better regrow one."
- How can gravity be both a curvature in space time and a boson-carried force?
- The phrase 'dimensions' is used in science fiction all the time as another plane of existence; what does theoretical physics say about dimensions and whether they exist or in what terms the word 'dimension' is used for in science?
- How was avogadro's number initially calculated? How is it calculated now?
- What's happening when people get in a "zone" and suddenly become more productive or successful at repeated tasks? Like when a basketball player starts making a bunch of shots in a row. Is this a skill that can be learned?
- Are eyelid muscles flexing when they are open or when they are closed?
- Is it possible to describe knots using mathematical functions?
- [Physics] How is temperature measured or defined in a vacuum?
- If water from a lake continuously flows into a river and then flows into the sea, why doesn't the lake get out of water?
- In a typical substance (lead for instance), how far apart are atoms relative to their size?
- What would a helium-filled balloon do in space?
- Is it possible for sea water to empty into the undersea oil wells that we are draining?
- Why do antibiotics cause rapid growth in animals?
- What actually are the 'impurities' that allow flux tubes to penetrate superconductors, achieving Flux Pinning?
- Zika virus has been known about for 70 years, why is it only now a big issues? Has it always caused microcephaly, or is this new?
- [Physics]How is there a kinetic energy difference of accelerated objects of different mass?
- Why are the Navier-Stokes equations called "the Navier-Stokes equations" instead of just "conservation equations"?
- Wet lab glassware terminology help. What is it?
- How can this drink have 8 grams of carbs, but also 0 calories?
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| How can gravity be both a curvature in space time and a boson-carried force? Posted: |
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| How was avogadro's number initially calculated? How is it calculated now? Posted: |
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| Are eyelid muscles flexing when they are open or when they are closed? Posted: During the day my eyelids are constantly opened, but at night they're constantly closed. Are the muscles controlling the eye lids constantly flexing all day to stay open or are are they constantly flexing all night to stay closed? [link] [comments]  |
| Is it possible to describe knots using mathematical functions? Posted: |
| [Physics] How is temperature measured or defined in a vacuum? Posted: Temperature is the average kinetic energy of atoms vibrating and whatnot so what is the temperature in a vacuum where there is no matter? Along this same line, would something cool in a vacuum if there is no matter to "absorb" its thermal energy? [link] [comments]  |
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| In a typical substance (lead for instance), how far apart are atoms relative to their size? Posted: |
| What would a helium-filled balloon do in space? Posted: I can't wrap my head around what would happen, because in space there is no "up" for a helium balloon to go to, so what would happen? [link] [comments]  |
| Is it possible for sea water to empty into the undersea oil wells that we are draining? Posted: I was on /r/mapporn and I read this comment talking of how if all the ice melted, and the sea level increased, the seawater could be diverted into the soon-to-be empty oil wells. If it was possible, how much sea level would it be able to lower? [link] [comments]  |
| Why do antibiotics cause rapid growth in animals? Posted: I read recently that antibiotics are given to farm animals to make them grow bigger, faster. Some people didn't believe me, so I looked it up again and confirmed it. What's happening in these situations? [link] [comments]  |
| Posted: I was curious about the process of Flux Pinning, and found that thin flux tubes from a magnetic field actually penetrate the superconductor itself, locking it in place, almost. However, I couldn't find any information on how or what these impurities are or come to be. Are they just small holes? I'm not sure if this is too mundane a question to answer, but I find the whole subject of Flux Pinning fascinating. I'm a Physics (British definition of) college student, so I'm essentially a layman, haha. Thanks a lot. [link] [comments]  |
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| [Physics]How is there a kinetic energy difference of accelerated objects of different mass? Posted: Let's say I push a trolley that weighs 1 kg with a force of 10 N for one second. According to F=m*a the trolley will accelerate to a speed of 10 m/s. Let's say I do the exact same but with a trolley that weighs 10 kg, it will accelerate to a speed of 1 m/s. The kinetic energy of the two trolleys are E = ( 1 / 2 ) * ( 1 ) * ( 102 ) = 50 J and E = ( 1 / 2 ) * ( 10 ) * ( 12 ) = 5J. If the applied force is the same, where does the 45J difference go? Does it take more energy to apply the same amount of force to a lighter object? That's the only thing I can think of but it doesn't seem right. EDIT: Formatting. [link] [comments]  |
| Posted: I've been taking a CFD course and learning about the Navier-Stokes equations and something that I don't understand is this: why are the NS equations called the NS equations? Because every time the professor or a book or a paper introduces the NS equations, they always make it a point to point out that one equation represents the conservation of momentum, another represents the conservation of mass, and the final one represents the conservation of energy (which for my purposes has always been neglected). If the NS equations are simply the conservation of mass and momentum, then why don't we call them simply the conservation of mass and momentum, or even more simply Newton's laws? [link] [comments]  |
| Wet lab glassware terminology help. What is it? Posted: Hi. I have found some glassware from a decommissioned laboratory and I'm curious what it is and a possible use for it. Please tell me at least what it's called so I can google the information. Thank you. [link] [comments]  |
| How can this drink have 8 grams of carbs, but also 0 calories? Posted: What kind of carbohydrate can't be turned into energy? [link] [comments]  |
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