What’s that lump in your throat you get when you’re about to cry? |
- What’s that lump in your throat you get when you’re about to cry?
- Is there an example of a mathematical problem that is easy to understand, easy to believe in it's truth, yet impossible to prove through our current mathematical axioms?
- How do optometrists get prescription for babies?
- Why doesn't the west coast get any hurricanes or tropical storms?
- Just watched the Sixty Symbols video on LHC and that it has discovered one particle; Is there any major physics theories that it has categorically disproved?
- Why can other animals eat raw meat but humans can't?
- How do CPU instructions work at the hardware/electrical level?
- If I were to magically appear several hundred km above the planet with no orbital velocity, do I experience “weightlessness” or not?
- How has Jupiter's storm lasted for so long?
- Why do black holes have such strong gravitational fields ?
- If you were to wear a completely super hydrophobic body suit, and jump into a pool, would you repel all liquid and just go crashing down to the bottom?
- Why haven’t we found any preserved dinosaur bodies in oxygen-depleted environments similar to bog bodies? (Or have we?)
- If energy is never lost, how does the earth get rid of excess energy from the sun?
- A geologist was quoted by the BBC as saying "most of the major animal lineages were established in a singular event in the history of life, the Cambrian explosion". How true is this? Was the Cambrian explosion really an event? And did the lineages of all modern animals begin in the Cambrian?
- If a black hole sucks something in, Where does it go?
- How do lymphatics gain protein from blood?
- How do stickers "really work?"
- If you have a hypothetical quad-copter that has a 24 hour battery life, is unaffected by the elements and had a clear path. Would it be possible for it to make a full rotation of the Earth while hovering in one place?
- How do societies/cultures 'lose knowledge'?
- What are the bumps on a humpback whale for?
- Is there a photoelectric effect that applies to quarks or other small particles? (instead of electrons)
- How is the change in magnetic field due to spatial variation different from from motional emf?
| What’s that lump in your throat you get when you’re about to cry? Posted: 24 Mar 2019 12:02 PM PDT |
| Posted: 25 Mar 2019 05:56 AM PDT I'm looking for a math problem (any field / branch) that any high school student would be able to conceptualize and that, if told it was true, could see clearly that it is -- yet it has not been able to be proven by our current mathematical knowledge? [link] [comments]  |
| How do optometrists get prescription for babies? Posted: 24 Mar 2019 12:00 PM PDT Just saw the cutest post on r/wholesomegifs of a baby getting glasses and being able to see clearly for the first time. I see these posts often but I always wonder how they get the eyeglass prescription right for babies? Normally eye doctors ask you the "is 1 or 2 better" question 15 times but babies can't answer that answer that so how do optometrists get around that? Is there a method they use that gets the correct prescription or is there a way to tell if the baby is near or far sighted and they just go from there? [link] [comments]  |
| Why doesn't the west coast get any hurricanes or tropical storms? Posted: 24 Mar 2019 05:03 PM PDT I've been living on the west coast for 18 years and had never had a problem with hurricane, but every fall the east coast always gets a storm. [link] [comments]  |
| Posted: 24 Mar 2019 08:00 AM PDT |
| Why can other animals eat raw meat but humans can't? Posted: 24 Mar 2019 06:38 PM PDT |
| How do CPU instructions work at the hardware/electrical level? Posted: 25 Mar 2019 07:44 AM PDT Hi, /r/AskScience. Longtime reader, first time poster. I actually have a degree (well, a minor) in CS, but lately I've been getting very interested in the actual physics/electrical engineering involved in computers, particularly the CPU. As all things in CS are conducted at various levels of abstraction, I guess I never really thought much beyond high-level code -> machine code -> CPU instruction set -> logic gates -> back to memory, but now I'm having a hard time wrapping my head around just how this all works, electrically speaking. My question: how do the electrical signals that physically make up computer code/instructions actually come into being? In CS, we'd imagine executing our code and it would instantly appear in the memory stack, but that's leaving a lot of steps out, I feel. If anyone could help me better understand this phenomena at an electrical engineering level, I'd be very grateful. I guess I'm ultimately getting thrown for a loop (no pun intended) by the fact that there are no moving parts inside the CPU or RAM; I'm not actually changing anything other than the position of some electrons by "coding," and I'm not all too clear on how this process actually physically takes place. Thanks in advance. [link] [comments]  |
| Posted: 24 Mar 2019 11:25 PM PDT I've seen multiple posts explaining that "weightlessness"'in space is a misconception, and that when we see astronauts in orbit, the apparent weightlessness comes from them being in freecall at 17,000 mph around the planet. Similar, there have been posts that say that the weightlessness that will be experienced by Blue Origin passengers is simply a side effect of being accelerated straight up and then the acceleration ceasing as the capsule enters a coast phase before accelerating back to earth. So my question is : if I was able to instantly appear 100km above the planet's surface with zero orbital velocity, would I experience normal 9.8 m/s/s towards earth and start falling? What if I appeared 200km high? 500km high? 1000km high? Did the Apollo astronauts heading to the moon in a coast phase (no acceleration) experience weightlessness or not? [link] [comments]  |
| How has Jupiter's storm lasted for so long? Posted: 24 Mar 2019 05:02 PM PDT |
| Why do black holes have such strong gravitational fields ? Posted: 25 Mar 2019 12:29 AM PDT They are formed from a collapsed star core right? I always thought gravitational fields depended on mass not density, why doesn't this work for black holes? [link] [comments]  |
| Posted: 24 Mar 2019 10:35 PM PDT Always wondered this after watching videos of liquids bouncing off shoes and surfaces that were covered in those crazy waterproofing sprays. [link] [comments]  |
| Posted: 24 Mar 2019 10:14 AM PDT |
| If energy is never lost, how does the earth get rid of excess energy from the sun? Posted: 24 Mar 2019 08:42 PM PDT Why hasn't the earth gotten so hot that life ceases to exist? What protects the earth from absorbing all energy it gets from the sun and holding on to it? [link] [comments]  |
| Posted: 24 Mar 2019 08:58 AM PDT |
| If a black hole sucks something in, Where does it go? Posted: 24 Mar 2019 03:12 PM PDT |
| How do lymphatics gain protein from blood? Posted: 24 Mar 2019 04:40 PM PDT From what I understand proteins are too large to pass through the walls of capillaries. When tissue fluid enters the lymph vessel it does not contain protein. Where and how does it get into a lymph? [link] [comments]  |
| How do stickers "really work?" Posted: 24 Mar 2019 03:31 PM PDT I'm wondering at a microscopic and molecular level. Do the glue molecules get locked in with whatever molecules make up the surface it comes into contact with, do they form bonds, share electrons, that sort of thing? [link] [comments]  |
| Posted: 24 Mar 2019 09:39 PM PDT |
| How do societies/cultures 'lose knowledge'? Posted: 24 Mar 2019 04:03 PM PDT The Greek and the Romans (and I'm sure other cultures too) seem to have had an amazing level of knowledge and wisdom in a wide variety of fields. They created things like the Baghdad Battery, the Antikythera Mechanism, special cements which helped create Aquaeducts that are still around millenia later. Also knowledge about astronomy, the human body and many other things I forgot about (pun bad, but intended). Many things took centuries to be re-discovered. How does this happen and what else might we have collectively forgotten over time? [link] [comments]  |
| What are the bumps on a humpback whale for? Posted: 24 Mar 2019 09:07 AM PDT I've done a little research and have found out they are called turbicles. They are seemingly for hydrodynamic performance, however, It seems to me that they would be bad for streamlining . [link] [comments]  |
| Posted: 24 Mar 2019 08:54 AM PDT In school we study the absorption of photons by electrons and leaving the atom but could other smaller particles absorb photons like neutrinos and quarks? [link] [comments]  |
| How is the change in magnetic field due to spatial variation different from from motional emf? Posted: 24 Mar 2019 12:34 PM PDT Consider the case where a wire is moving in a magnetic field, the source of the magnetic field can either be the loop itself(rail) or an externally applied one (magnet). If the conductor where to move, the induced emf would simply be the change in flux, which simplifies to ε = -vBL for motional emf where the charges experience a magnetic force on them. However, if the loop was stationary. And the magnetic field source were to move causing two effects:
If both effects were occurring this equation can represent it. How is the second term, only exclusive to the change in magnetic field and not considered to be similar to motional emf? [link] [comments]  |
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