Jump to content

studiot

Senior Members
  • Posts

    17639
  • Joined

  • Last visited

  • Days Won

    93

Everything posted by studiot

  1. That must depend upon why the humidity is as it is.
  2. Sorry I don't understand the question. Nor do I understand why the OP, who I see has been back several times since I posted, has not responded.
  3. I don't see how your post deserved a negative vote so I have reversed it. It was an unbiased factual report. Thank you for reporting the AI response, which seems to contain only generalities gleaned from advertising. I would trust it as far as a vehicle from a used car saleman.
  4. Thank you, I know how sound systems work. Until the advent of digitisation, all the recording systems I know of have been transverse to the direction of travel of the recording medium, from soot on glass plates through impressions in wax cylinders to linear tracks on long pieces of paper to spiral tracks on disks. What I am trying to understand is what your question is. Do I understand that you wish to analyse this track to determine playing speed ? If the track was a piece of music, a musician would be able to determine the number of beats per minute for the piece. So if you played and timed it at any old speed, correcting it to the beat would do it for you. I am not a musician so would not be able to tell you if Fourier analysis would do this for you instead, however I have done FA for engine analysis achieving the same purpose. Effectively you need a Rosetta length embedded in the sound track that you can calibrate. By the way I once read a very amusing science fiction short story about aliens who did this, not for sound but for a film strip they found in the ruins of an old dead civilisation. They worked out that running the film through a suitable projector they created, would produce a 'movie'. But they didn't know how fast to run the film. That was when the fun started.
  5. Sound waves are indeed longitudinal, but aren't the mechanical copies impressed on the medium transverse ?
  6. I don't like the use of the word coercion because it is stronger than forced. My question was Rhetorical. Do you seriously believe there is only one unique use of the term free will employed ? On the face of it your definition sounds good but it is incomplete. Intentions and beliefs ? All of them all of the time ? Is free will a general state or doe it apply sometimes and not others ? No I was not starting at the beginning, but do I not have a point (that you ignored) ?
  7. Wouldn't a counter example to this definition be someone at the beginning of a nuclear physics course saying I have free will to pass my exam ? She may be able to pass that exam at the end of the course, but at the beginning she can only wish.
  8. Would you not say the term isolated is better than free ? A free body has a special significance in mechanics, that is usually associats with many forces acting on that body. If we want to say 'free of all imposed forces' (which is what I think you mean) physicists would say isolated. Would you not agree that if we are going to propose a unversal rule, like your original hypothesis, we must be able to apply it universally ? Even to systems that although we know of no actual instance, we would expect conform to all known laws ? So consider either a universe with only one single body in it or alternatively one single body so far from any other body that it may be considered isolated ? Can you describe the motion of such a body ?
  9. Understanding "Free Will" ? If you are going to understand free will you need to start by realising that this is a compound statement with an inherent tension or partial contradiction. Furthermore if you are going to fully understand it you cannot pick and choose specific or particular definions alone. ~Fully automatically points to 'understanding' being a range rather than a single instance. We can then see that both free and will also have ranges of meaning rather than just one. Sometimes it is easier to define the negation or opposite of something and then say that the something is 'everything which is not the negation'. Working along these lines what is the opposite or negation of free will ? Do we negate one or both terms ? Opposites to free couls be 'forced', or 'constrained' , which are different. But 'will' implies a degree of forcing, therby opposing the idea of free. Constraints are weaker than forcing, to which there is no opposition. So we come to the idea that free will is anything within a set of constraints. Physics make considerable use of the idea of 'degrees of freedom'. On use of degrees of freedom is in making the distinction between a structure and a mechanism. Structures ( and indeed other systems) can also be what is known as overdetermined. Mechanisms are where a structure is underdetermined, so has one or more degrees of freedom, so is 'free' to take up a range of positions. Does the mechanism therefore possess 'free will ? Note for @Alkonoklazt Computer systems and programs also conform to this underdetermined/overdetermined/uniquely determined classification. Don't know why the @function is not working properly ?
  10. Which would be incorrect so you do, in fact disagree with Newton. A body will continue in its state rest of uniform motion, in its right line, unless acted on by a force. Which boils down to And a change to its state of motion is defined as an acceleration, whether from rest or any form of actual motion, rectiliear or otherwise. Note carefully the difference between what is needed to effect a change of motion and what will happen if no force is applied. An associated question If a force is applied to a body will it necessarily change its state of rest or motion ?
  11. To try something and find it doesn't work......................................That is adventurous. And if you then learn something like why it didn't work then it may have been worth it. To try the same thing again with the same result........................ is foolhardy. To try the same thing a third time.............................................. Now that is just plain stupid.
  12. Note that since T = 2π√(m/k). the period also depends upon the mass of the lamp.
  13. What do the laws of Thermodynamics have to say about this ? Say you have a cubic metre of water at 5oC and you pump it down 1km. 1) How long will it have to stay there bring it up to 30oC? 2) Once it is up to temperature you pump it back up again. How much energy will this take ? 3) Once it is back to the surface and (ignoting losses) at 30oC, how much heat can you extract from it ?
  14. studiot

    Colour

    Excellent, we need more women with an enquiring mind. But please try to respect the views of others as well as stating your own. And be prepared to modify your ideas as a result of discussions with others. The collection of the matters you have ranged over in this thread sound like a youngster trying to make sense of and reconcile different stories told to you by different teachers over a very wide range (religion, science, arts and so on). I don't know and I don't need to know if that's true and further I don't know if you are using a translator, though your English is pretty good. English is an excellent language because it allows two concepts for nouns and adjectives. English allows the 'abstract' and the 'concrete'. Colour is an abstract noun and I agree with you that 'colour is in the eye of the beholder.' So colour does exist as an abstract noun, as do individual colours. But you have some misconceptions about this as well. So two things arise from these statements. Firstly, colour is seen and used by other creatures than humans. More particularly, and amongs other creatures, bees, butterflies and estrelid finches see more colours than humans. This ability is called tetrachromacy. Many members have offered you information about how we know these things and of course you can look them up for yourself. If you look up the sensitivity of eyes to the three colour system I described, you will discover that the eye does not have the same sensitivity across the board. The eye sensitivity tails off in the red and blue regions and has a peak in the yellow/green in the middle. A botanist once described to me the connection between the enhanced yellow sensitivity and the fact that the first flowers of spring are nearly all yellow. There are fewer pollinators about at that time so it is important for the plants to best attract them. Secondly there is no way I can tell exactly what you see when you see a particular colour or if it is the same or different from what I see. Worse still, the question of what do you or I see when I view the same light source in either different circumstance or at a different time. Do I see the same colour ? There is an old joke about the American television system NTSC - 'never twice the same color.' So what have we learned about the subject of colour ? Well we have learned that colour is a very complicated subject and that what we is is subjective. Because of this subjectivity we require objective information and criteria, if we want to delve more deeply into the subject. Luckily modern science has developed many objective techniques and I have described a few. We have machines that can receive the incoming light and analyse it in an objective way so that we can compare one colour with another. We can then use these measurement for instance to set the colour guns in a cathode ray tube so that it is producing an identical colour (ie standardisation) to that of another cathode ray tube. And from you point of view you can extend to understanding of the subject of colour to include objectivity v subjectivity. Objectivity v subjectivity is incredibly important in science.
  15. studiot

    Colour

    One further consideration for those who think that 'colour' is determined by the frequency of some wave and nothing else. Since this has been placed in quantum physics, The frequencies of light produced by quantum processes is very tightly defined by the process. So the spectral lines are the same if you are on Earth or Sirius or Alpha Centauri. However because these places are moving at speed relative to each other each observer will observe the line produces by the others at a different frequency. This is known as the Galactic redshift. The patterns of these lines are used for astronomical calibrations, but the absolute frequencies cannot be so used, only their shifts are significant.
  16. studiot

    Colour

    Of course I gave you human references. References suitable to martians wouldn't be of much use would they ? Is a reference to time an attempt to deflect attention from yourself ? The answer is #9e978e Around the world, printers, artists, designers, textile companies and many more use the Pantone system of colour referencing. Some companies even have their own special Pantone colour and are very jealous of anyone else using it. The point is that if you are going to print, paint or otherwise put a design onto something such as a piece of paper, plastic, tea-shirts, packaging, company headed paper, you want the colour the be identical. That is the point of the Pantone system. https://www.pantone.com/color-systems/pantone-color-systems-explained So are you going to answer my questions or not ?
  17. studiot

    Colour

    First you say and Then you say and If we ignore the typo in your statement of the frequency of green light, how is this not directly contradicting yourself ? How is your (typo corrected) statement not a measurement ? You say you read what I offered so you should have found out that I can set my computer screen to show a colour wash of 16 colours, 256 colours, 64 thousand colours and so on. To do this I must have a measurement to instruct the computer circuitry to generate all these different colours. In fact you should have found out that the standard measurement provides 3 numbers which are not frequencies. This then enable me to generate the same colour on my screen as someone in Australia, if she gives me her 3 numbers. So please do not tell me you cannot measure colour. There are many other way to do this for other purposes. Final question for you to think about If I go out in the dark and illuminate my grass lawn with a strontium lamp, what colour will the grass appear to me ?
  18. Usually new work of any description extends existing knowledge, but remains compatible with where existing knowledge is known to work. The have been a very few cases where the new work has actually contradicted existing thinking, caloric would be an example, but such examples are very few indeed. And there has never been a case where the existing rules of mathematics has been breached in the way that you are trying to do here.
  19. studiot

    Colour

    Did you read the material I offered or am I wasting my time ? If you come to the PHYSICS section of a scientific discussion forum like this one and start rabbitting on like this you can't imagine how quickly you will loose credibility. I call the first quote trying to introduce religion by the back door and the second quote preaching religion.
  20. Like this and the rest of your summing up +1 Now here's a thought Philosophical determinism is a bit of a cop out isn't it ? After it it is a bit like the God-did-it brigade. Determinist. "Actions are determined !" Questioner " Can you show me how to determine any action ?" Determinist "No idea but I believe it can be done if all the information and all the rules are known" Questioner "So who knows all of this stuff ?" Determinist " God ?" Something else I have never been able to get a determinist to clarify. Is determinism A Priori or Posteriori or both or neither ?
  21. I thought we had agreed that all motion is relative to something other than the object itself. You did not object when I asked you for a definition of motion and rephrased your reply in a more useful form. You also replied that you disagreed with Newton's First Law. Do you know what Newton's First Law states ? The book on the table is not moving on or from the table, yet there are forces acting on it. If i add another small force by pushing gently with my finger the book still does not move from the table, why is this ?
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.