How does your phone gauge the WiFi strength? |
- How does your phone gauge the WiFi strength?
- What aspects of a speaker determine it's max volume?
- Are the protons and neutrons in a specific isotope always arranged in the same/similar way?
- Why, when you brush your teeth right before going to bed, do you need to brush them again when you wake up in the morning? It feels as though you have drank two glasses of coca cola in your sleep.
- When ancient language or code was deciphered, how did they know that it is correct?
- Why was the Wheeler-Feynman absorber theory abandoned?
- Does the normal force between two objects affects the heat transfer between them?
- When you are pre-heating an oven, does the internal temperature rise at a fixed rate, or exponentially?
- Does wiping off your sweat prevent the body from cooling down?
- Is it possible to accurately predict the magnitude of an earthquake by measuring the waves in backyard pools?
- Is the Rutherford Scattering Experiment an example of Quantum Tunneling?
- How much oil is there?
- How come we never sneeze while sleeping?
- How do mosquitos know when to stop drinking blood so that they don't pop themselves?
- Was the Chicxulub meteor a random stray, or was it from our local system?
- How do we know which wavelengths are the eyes of other animals sensitive to?
- If sand is basically tiny pieces of rocks, why is it that melting rocks doesn't create glass but melting sand does?
| How does your phone gauge the WiFi strength? Posted: 09 Jul 2019 03:18 AM PDT What's the reference against which it compares the WiFi signal? And what does it actually measure? [link] [comments]  |
| What aspects of a speaker determine it's max volume? Posted: 09 Jul 2019 04:28 AM PDT |
| Are the protons and neutrons in a specific isotope always arranged in the same/similar way? Posted: 09 Jul 2019 05:42 AM PDT My understanding is that neutrons help glue the protons together via the residual strong force, while also helping to spread the protons out to reduce coulomb repulsion by physically separating them. This makes a bit of sense, but from this interpretation then, it would seem to me that its not just the number of protons/neutrons in the nucleus that matter, but also (to an extent) the physical placement of the neutrons and protons with respect to one another. It would seem that an atom with ALL of its protons clumped together in a ball that is wrapped in a shell of neutrons wouldn't be stable, despite having the correct number of protons/neutrons. I know this is a rather extreme example, but the reason for giving it is that it makes me believe that just having the right number of protons and neutrons isn't enough. And it also raises a bunch of other questions for me such as: - How many stable configurations are there for a given atom? - Are protons/neutrons organized "rigidly" into a nearly spherical nucleus? Or can the shape of the nucleus change/deform (either with time, or maybe just being statically asymmetrical)? - If the distribution of protons/neutrons is even slightly asymmetrical, wouldn't this give the nucleus some kind of dipole moment? - Is the arrangement of the protons/neutrons always the same/similar for a given isotope? - For extremely heavy elements that are already unstable to begin with, does variations in the distribution of protons/neutrons help to increase or decrease stability from atom to atom? - Do protons and neutrons move around while in the nucleus, or are they more or less fixed in place? Am I barking up the complete wrong tree here, and trying to push my classical views on a quantum system in a way that doesn't work? Any kind of info would be greatly appreciated! [link] [comments]  |
| Posted: 09 Jul 2019 02:08 AM PDT |
| When ancient language or code was deciphered, how did they know that it is correct? Posted: 08 Jul 2019 05:42 PM PDT |
| Why was the Wheeler-Feynman absorber theory abandoned? Posted: 09 Jul 2019 08:16 AM PDT I'm starting to learn the basics of quantum mechanics with the goal to learn quantum field theory. As I understand, the concept of spin is fundamental to quantum theories, so I want to understand how people came to its discovery and how the formalism was derived and defined. Being sceptical I also try to understand the history of the field concept. At first the field was just a background on which particles (as the atoms of matter/energy) acted, but only the particles were "real" (basically as the test subject of the field); so the field was an abstract concept, in the same way as "spin" is an abstract concept. At which point was it decided that "the field(s)" is a real physical entity? I understand that whatever error makes the formulation of a unified theory an impossible task, was made in the 1920s/1930s. It could be a simple thing like a translation error from German to English and back, it could be a logical/mathematical error in the definitions of the concepts. It could be the guilt of Dirac who ignored the discussions which led to the Copenhagen interpretation and just kept on working on a fundamentally wrong theory, but one which works almost perfectly. And there's no out currently because everything works too well, nobody wants to give up the field. It reminds me of the switch from Geocentrism to Heliocentrism: Heliocentrism as a theory was worse back then, it took some time to iron out the problems. It seems that Wheeler/Feynman didn't buy the foundations of the then current physics and tried to base a theory on the "action at a distance"; but it seems that it was abandoned, seeing the success of GR and QM. [link] [comments]  |
| Does the normal force between two objects affects the heat transfer between them? Posted: 08 Jul 2019 10:16 PM PDT It sometimes feels hotter when you press hard against something hot than when you lightly touch it. It got me thinking about whether the amount of normal force between two objects affects the rate of heat transfer between them. Assume object A is at 0 degrees Celsius and laid down on a 100 degrees hot floor. Object B is identical to A in shape and initial temperature but has twice the mass, and laid down on the same floor. Will B heat up faster than A? [link] [comments]  |
| Posted: 08 Jul 2019 10:38 PM PDT |
| Does wiping off your sweat prevent the body from cooling down? Posted: 08 Jul 2019 04:45 PM PDT Does the cooling effect come from the sweat absorbing the heat on its way out or should you leave it and not wipe it to lower your temperature more efficiently? [link] [comments]  |
| Posted: 08 Jul 2019 06:02 PM PDT |
| Is the Rutherford Scattering Experiment an example of Quantum Tunneling? Posted: 08 Jul 2019 04:43 PM PDT During the Rutherford Scattering Experiment particles went through a thin sheet of gold but some also reflected back. Is Quantum Tunneling one of the reasons for this? [link] [comments]  |
| Posted: 08 Jul 2019 03:48 PM PDT How long untill our usage of oil depletes its reserves? [link] [comments]  |
| How come we never sneeze while sleeping? Posted: 08 Jul 2019 12:01 PM PDT |
| How do mosquitos know when to stop drinking blood so that they don't pop themselves? Posted: 08 Jul 2019 04:21 PM PDT |
| Was the Chicxulub meteor a random stray, or was it from our local system? Posted: 08 Jul 2019 01:00 PM PDT Is it possible to tell the origin of the stellar body that caused the Chicxulub impact crater? Every recent bit of info available on Chicxulub suggests it could have caused the mass extinction of the dinosaurs (KT boundary etc.) I'm curious about how long it may have orbited Earth, if it had any super rare elements or minerals not found in the solar system, etc. [link] [comments]  |
| How do we know which wavelengths are the eyes of other animals sensitive to? Posted: 08 Jul 2019 03:18 PM PDT For example, how did we find out that kestrels are ultraviolet sensitive? [link] [comments]  |
| Posted: 08 Jul 2019 11:17 AM PDT |
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