Is the uncertainty principle basically because at that level, to measure the system you have to interfere with the system somehow? |
- Is the uncertainty principle basically because at that level, to measure the system you have to interfere with the system somehow?
- Is the physiological process of falling asleep due to boredom the same as falling asleep due to tiredness?
- Does the abundance of plants that have embryonic leaves mean that plants (dicotyledons especially) have inherited this trait from a common ancestor? or is this likely convergent evolution?
- Any update on theories on how will universe end?
- Is every star part of a galaxy?
- Since vacuum cleaners operate by creating a pressure differential between the atmospheric pressure and the internal pressure. Does that mean vacuum cleaners operate less efficiently at higher altitudes?
- Why does fuel not burn below or above a certain fuel-air ratio? If you keep reducing the ratio of fuel to air, at a certain point it will no longer combust. The same thing happens if you increase the fuel too much without adding any more air - it will eventually stop combusting. WHY?
- Why does diesel fuel use compression ignition and why do diesel engines have such low RPMs?
- Is there any science behind Psychometrics for filtering job candidates?
- How is a (returning) flu season impacting a Delta coronavirus wave in a given country?
- On USGS DYFI maps, how plausible is it that people are feeling M4.3 earthquakes almost a thousand miles away?
- why did we need 5 petabytes of data to take an image of a black hole?
- What's under Antarctica? is there water under it? on top of that the if the ice melts will it relase preserved ancient species?
- If wee breathe steamy air, do those water accumulate in lung?
- Guilin Karst is a famous example of limestone mountains. Do limestone mountains occur elsewhere in the world? If not, why not?
| Posted: 19 Sep 2021 04:13 AM PDT Basically my question boils down to the fact that to me at least it seems to intuitively make sense that the quantum scale makes measurement hard but I don't see many people talk about it like this and I'm wondering if I've managed to get the wrong end of the stick. Like if I want to measure a javelin in flight I can use video. There are a crap ton of photons bouncing off it all the time that allow me to see where it is, I record these over multiple frames and bam I've got both where it is and where it is going, easy. Now if we try that same thing again where I'm trying to measure a photon in flight, well now if I was in a well lit stadium like for the javelin, it would seem to me at least to be a bit like trying to measure a snooker ball with another snooker ball with billions of other snooker balls flying around. Suddenly when you think about it like that then the idea that if I carefully created a lattice of photons with a corresponding detector then if one of the corresponding detectors didn't end up receiving its photon we could say hey I know it was there but seeing as I've blasted it with another photon, I have no clue where it is now. Given this complexity (if I've even got it half right) it seems to me at least like most explanations of quantum experiments at least at the undergrad level don't really talk about the mechanics of measurement or observation and so it all sounds a lot more spooky and without those bits of info it's harder for people to reason about. Like the uncertainty principle sounds crazy until you start thinking that the only way to measure is to collide. Now I realise that even the term collide is potentially a massive over simplification of the interaction of forces at the particle level but I hope it conveys what I see as the problem. So yeah I had what felt like a flash of insight into what all the the uncertainty principle was explaining but then it seems weird that we just talk about experiments in simplified terms like observation, wave function collapse and kind of avoid talking about what they even mean by that and how they accomplish that. I mean I get that the maths behind quantum mechanics explains what we observe but I mean more about the experimental methods we use to confirm the maths and how we observe the quantum level from a macro level. So the crux of the question is twofold:
Thanks! [link] [comments]  |
| Posted: 18 Sep 2021 08:29 AM PDT |
| Posted: 18 Sep 2021 08:42 AM PDT |
| Any update on theories on how will universe end? Posted: 19 Sep 2021 01:52 AM PDT In an "askreddit" thread on what will happen after death, someone did post an insightful quote on how our atoms will be here forever, and this leads me to reflect on the few theories I did read here and around the internet on the end of the Universe, mostly about the so called "heat death". When looking around in this sub, I did realize that the few threads on the matter are few years old, and I was wondering if more recent studies did change our perspective, or maybe made more solid one of the few theories. Thanks for any reply. [link] [comments]  |
| Is every star part of a galaxy? Posted: 18 Sep 2021 03:47 PM PDT |
| Posted: 18 Sep 2021 11:47 AM PDT |
| Posted: 18 Sep 2021 11:52 PM PDT for example, for hydrogen gas, it's wikipedia states that it combusts with air when it's between 4% H2 in air, and 75% H2 in air. Higher or lower, and it no longer burns. I don't understand why there wouldn't' at least be incomplete/partial combustion. [link] [comments]  |
| Why does diesel fuel use compression ignition and why do diesel engines have such low RPMs? Posted: 18 Sep 2021 11:47 AM PDT I should clarify that I am aware of how engines work in general (intake, compression, ignition, exhaust etc). I don't need an explanation as to how an engine actually fires. I want to know what the properties of diesel are that allow it to use compression ignition instead of spark ignition. Why do the engines have such low RPMs? What is it about diesel that allows for it to create so much torque at such low speeds? [link] [comments]  |
| Is there any science behind Psychometrics for filtering job candidates? Posted: 18 Sep 2021 06:03 AM PDT Psychometrics are the new biggest craze in the hiring process nowadays. They claim they can understand how you fit into the work culture and organization by assessing your "leadership", "emotional intelligence", "communication", "problem solving", and etc all through mini games. Is there any actual data or substantive research supporting these claims? [link] [comments]  |
| How is a (returning) flu season impacting a Delta coronavirus wave in a given country? Posted: 18 Sep 2021 12:54 PM PDT What are the implications if it comes sooner than the wave? What if during the wave? [link] [comments]  |
| Posted: 18 Sep 2021 06:54 AM PDT Often times I'll be looking at an earthquake report and reading the Did You Feel It responses. For the M4.3 earthquake in LA last night, some people report feeling it in Santa Rosa, or even in Salt Lake City, which are all 400-600* miles away. Is this plausible scientifically? [link] [comments]  |
| why did we need 5 petabytes of data to take an image of a black hole? Posted: 17 Sep 2021 10:27 PM PDT |
| Posted: 17 Sep 2021 07:32 PM PDT |
| If wee breathe steamy air, do those water accumulate in lung? Posted: 18 Sep 2021 01:35 AM PDT |
| Posted: 17 Sep 2021 08:17 PM PDT Google says that limestone occurs under marine water, but I've never heard of limestone mountains anywhere else? Am I misunderstanding? [link] [comments]  |
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