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Physics

The world of forces, particles and high-powered experiments.

  1. Started by jeff Mitchel,

    I would like to define time as the "speed of one entity in relationship to the speed of another entity" i.e. It takes her 1 hour to walk around the block. (her speed in relation to the speed of the clock.) Where problems arise is when we use the word "time" in the abstract: "The time it takes for the earth to go around the sun is one year." The above statement has nothing to do with time but is the definition of a year, i.e. When the earth goes around the sun we call it a year. Yes, yes, Quarks Rule!!

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  2. CREATION OF ENERGY Experiment Consider a ball of density 1100kgm-3 and mass 1kg. Consider a tank with water of height 10m. Place the ball in the tank so that it sinks to the bottom of the water. While at the bottom of the water the ball is made to displace an additional volume bringing down its density to 900kgm-3 thus it starts rising to the water surface. Its previous volume was (1/1100)m3 and its new volume is (1/900)m3 The volume added is the new volume minus the old volume (1/900) − (1/1100) = 0.000202m3 The energy needed to work against the water pressure and create this new volume is equal to pressure multiplied by volume 𝐸= 𝑃𝑉 &#…

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  3. Optical photon is produced e.g. during deexcitation of atom, carrying energy, momentum and angular momentum difference. So how is this energy distributed in space - what is the shape and size of single photon? Looking for literature, I have found started by Geoffrey Hunter, here is one of articles: "Einstein’s Photon Concept Quantified by the Bohr Model of the Photon" https://arxiv.org/pdf/quant-ph/0506231.pdf Most importantly, he claims that such single optical photon has shape similar to elongated ellipsoid of length being wavelength λ, and diameter λ/π (?), providing reasonably looking arguments: Is it the proper answer? Are there other reasona…

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  4. on these forums. Books that have been recently denounced: ISBN 0-316-15579-9 The Cosmic Landscape ©2006 Leonard Susskind First Edition: December 2005 Little, Brown, and Co. New York USA May I please have an explanation why this book is not acceptable as a reference on this forum, since it is a legitimate publication by a famous physicist? Thanks in advance. Please be aware I will be informing Dr. Susskind of your response. You should be aware that he has responded vigorously in the past to accusations against him similar to yours. Good luck. While we wait, I will append a list of books you appear uncertain about: Albert Einstein, Relativity…

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  5. Started by alan2here,

    This is a quote of somone on another forums explaning to the other forum members what I ment when I was trying to discribe an anomile I encountered while playing with magnets The orriganal post is here http://www.steorn.net/forum/comments.php?DiscussionID=17702&page=1#Comment_260721 Please can I have some feedback

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  6. Started by pmb,

    That have zero mass in what sense? Your use of the term "mass" is contrary. When you choose to say that light has zero mass then you have chosen to use the term "mass" to mean "proper mass". The proper mass of a particle does not change its value with c. Therefore the assertion that Einstein showed that a massive particle can't travel at c because its mass would become infinite is then am invalid statement.

  7. Started by SkepticLance,

    Interesting article in New Scientist (Australian printed edition 5 April page 36) by Prof. Michio Kaku - theoretical physics at City University of New York - and author of "Physics of the Impossible." He discusses what scientific and technological developments might occur in the future - which will happen soon, or later, and which are plain impossible. He points out that the history of science is full of luminaries that make lousy predictions. Examples are Lord Kelvin denying that heavier than air flight is possible, claiming that X-rays are a hoax, and that radio has no future. Ernest Rutherford denying that the A bomb will ever be possible. Prof. Kaku s…

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  8. Started by gre,

    Is it possible the Lorentz force regulates a the ground state in hydrogen.. If no, why not? Using the Bohr magneton it seems some atoms actually have pretty strong magnetic fields, which could have enough force to be a "ground state" energy source/regulator.

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  9. I was was just wondering about what would happen if a signal was being transmitted toward us from a transmitter moving at 0.5C. Could the final velocity of the signal be 1.5C. Einstein did state that no matter how fast you are moving, if you turn a lamp on the light will still MOVE AWAY from you at 3E08 m/s so if the transmitter was moving at 0.5C then the signal being transmitting would move away from it at 1.0C giving the signal a resultant velocity of 1.5C relative to your velocity. If this were to happen then the wavelength will be two thirds its original making its frequency 1.5 times the original, kind of like how the sound waves coming from an emergency veh…

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  10. i am interested in determining how strong the weak force is compared to the bigbang because i hypothesize that the weakforce is caused by an explosion. so where is the best place to get accurate data ill need about both of these occurances. and im curious if anybodies ever theorized the weakforce is an explosion. look forward to talking about this with you all.

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  11. Started by Daniel Foreman,

    There is a lot of talk about higher dimensions, and this is a very misunderstood concept in science fiction. Too often I hear dimensions and alternative universes lumped into the same thing. They are not the same thing at all! Dimensions are in fact the most mundane and boring thing in the universe. Dimensions are simply the space in which we live. Our up, and down, left and right, forward and backward. So next time you hear about someone slipping into a set of parallel dimensions and discovering a whole new world. Just giggle and shake your heads at them, because they are quoting one of Science fictions biggest crimes towards public misunderstanding. I in no way beli…

  12. Started by Bmpbmp1975,

    Does anyone have any current updates on Betelgeuse? i notice different articles say different things some say dimming stopped, some say still going and some say it seems to be a little brighter? https://www.forbes.com/sites/brucedorminey/2020/02/17/betelgeuse-has-finally-stopped-dimming-says-astronomer/#397113b67945 The star has been nearly steady in brightness now over the last 10 days,” said Guinan. We could be at minimum brightness now and very soon the star will slowly brighten if it follows its normal 420 to 430 period of pulsation, says Guinan. Or when the star periodically changes its brightness, he says. These periodicities are seen in ob…

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  13. Started by ChrisDK,

    Hi everyone, I am new here, but I have a question I have been thinking about a lot. The force of gravity is one of the fundemental forces in nature. But my main question is, what actually generates the force itself? Now I know of course that gravity is proportional to the mass of an object, but that must mean that every atom on it's own, generates a very tiny amount of gravitational force - right? So is it the nucleus, electrons, quarks, the charge of the atom or something entirely different that actually generates the force? All the research I have been able to find about gravity, never really covers the subject of the force itself, but rather more it's eff…

  14. Started by Pete,

    I've been curious about this lately so I wanted to ask a question for the folks here. Who among you consider themselves to be open-minded physicists? For those who consider themselves to be open-minded can you think of a concrete example? Please explain what it means to you for a physicists to be open minded? Thank you all in advance. Pete

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  15. Started by Relative,

    In a reference frame of an object been rotated from a central point on a bar in a circular motion, is the torque directed along the bar centrifugally with no centripetal force acting on the bar?

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  16. Quantum physics is becoming really popular on TV and other media, mainly b/c it has the potential to offer so much, but in reality provides so little. yea it sounds cool to talk about wormholes and quarks and leptons, but at the end of the day, what does this get us? I really think quantum physics got started by a bunch of geniuses who got bored and started breaking down matter to unnecessary levels. Sure, I can tediously calculate all the electrons on my computer screen, or explain why benzene is a stable ring due to its orbitals. But at the end of the day, these don't really save or help anyone or anything. Yes, I'm aware of the things physics has given us such …

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  17. Started by Sha31,

    http://en.wikipedia.org/wiki/Magnetic_charge - "monopole detection is an open problem in experimental physics" - "magnetic monopole particle has never been conclusively observed" - "has never been evidence for the existence of magnetic monopoles" How come magnetic monopoles supposedly do not exist, and why would it be hard to find evidence and conclusively observe magnetic monopole fields if all we need is a battery, wire, permanent magnet and know about Ampere's law? http://en.wikipedia.org/wiki/Ampere%27s_law So, obviously magnetic field of a moving charge has only one pole, right? Magnetic dipoles look like this: http://…

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  18. Started by michel123456,

    Can someone provide a link to an accurate description of the double slit experiment. i mean, not the result, but all the details. More specifically, I'd like to know the following 1. what is the material of the shield (the blocking screen) that have the 2 slits 2. whether this shield absorbs perfectly the photons that hit or whether the photons are reflected back in the room. 3. the thickness of this shield 4. the wavelength of the emitted light. For example I have read that the original experiment by Young was made with sunligth (I suppose with visible light). Visible light has a wavelength between 380nm and 780 nm. So if the shield in which the slits are o…

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  19. Started by aViolentBee,

    Can anyone tell me the velocity of a neutrino please? I couldn't find it anywhere...

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  20. CPT symmetry (charge, parity, time) is at heart of modern physics: However, it seems treated seriously only in scale of Feynman diagrams with a few particles - is it still valid for macroscopic physics? Feynman diagrams of Avogadro's scale numbers of particles? In other words, if preparing CPT(initial conditions), should they lead to CPT(their evolution) ... including time reversed causality direction? While it seems technically challenging to prepare CPT(initial conditions), in theory general relativity allows to prepare T(initial conditions) - by hypothetical Klein-bottle-like wormholes ( https://en.wikipedia.org/wiki/Non-orientable_wormhole ) e…

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  21. Started by Primarygun,

    What is the resistance of a capacitor? From the data of experiement, I was convinced that the resistance tends to zero. Is this the truth? There's a part of empty space between two parallel plates. Isn't the resistance very large as it seems it's hard for electrons to pass through these spaces. How do you reconcile the two facts?

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  22. Started by Mitch Bass,

    Light has been measured to move at about 186,000 miles a second. In Einstein's special theory of relativity he explained what would happen if that ultimate speed limit was approached. His theory was proven correct when it was determined that there was an absolute differential between the time registered on atomic clocks on Earth versus the atomic clocks on vehicles orbiting our planet. My question is, does anyone have a theory as to why light maxes out at about 186.000 miles a second. I mean why specifically that speed? I am a part of a think tank that is of just recent trying to answer this very question. Our team is working on the idea that this speed limit has somethin…

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  23. Started by Chriss,

    I was wondering after reading a Dean Keith Simonton article about geniuses http://izt.ciens.ucv.ve/ecologia/Archivos/ECO_POB%202013/ECOPO1_2013/Simonton%202013.pdf if Nobel Prize is to blame because science it became a trend, fancy. And people who can have ideas are rejected. What you think ?

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  24. Started by Yaniv,

    Classical physics predicts weight (W) should NOT change at increasing temperature (T) in vacuum. Relativistic physics predicts W should INCREASE at increasing T in vacuum. My theory predicts W should DECREASE at increasing T in vacuum and can be found here yaniv-stern.webnode.com. W reduction at increasing T in vacuum disproves conservation of mass and most of the rest of #physics. Over the past ten years I contacted thousands of scientists to weigh a heated metal in vacuum and publish the results. I did Not get the results of the experiment. #ResultsRequired

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  25. The second law of thermodynamics expresses that things tends to go from order to disorder as time progresses. Yet, the evolutionist says that this law must be violated billions of time. On this discussion topic I would like to know (and would like to discuss) 1) What is the reason for disorder (or increase in entropy) according to second law of thermodynamics? 2) How can we apply this second law of thermodynamics to the evolution and cyclic universes? 3) What is the reason for not converting, potential energy into 100% kinetic energy in internal combustion engine?

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