Physics
The world of forces, particles and high-powered experiments.
Subforums
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Vector forces, gravity, acceleration, and other facets of mechanics.
- 3.6k posts
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For discussion of problems relating to special and general relativity.
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Quantum physics and related topics.
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Atomic structure, nuclear physics, etc.
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Topics related to observation of space and any related phenomena.
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3589 topics in this forum
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Opinions or personal theories on this? Legitimacy, Facts, Personal ideas? Just enjoy view points and personal ideas and facts just eager to learn.
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Reputation Points
- 2 replies
- 1.2k views
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what the theory of everything should contain? should that theory explain matter,time,space,...or just unify the quantum mechanics and relativity theory. what are parameters of that that theory?
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Reputation Points
- 3 replies
- 1.1k views
- 1 follower
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So I'm new to this but I'm curious as to times correlation to Quantum Computers, if qubits ect. Can be both ect. Wouldn't quantum computers defy time and be the key to predict the future to an extent through algorithms and Ai ? In other words with the vast knowledge that AI has gathered including Facebooks algorithms and data of social trends and human predictability in groups such as in psychology like a flock of birds, couldn't quantum computing and Ai with an outside influence such as propaganda steer human events or history? Like I said I'm 22 not so smart but if you understand what I'm asking and can give me your best explanation and answer I would be greatful. …
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Reputation Points
- 4 replies
- 1.2k views
- 1 follower
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I ask this as a teacher, not a student... if you have three sets of parallel plates... one of +2a and +a electric potentials, one of of +a and -a electric potentials, and another of +a and 0 which has the higher potential energy? I assume it's +a and -a as it relates to potential difference, I just want to make sure.
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Reputation Points
- 1 reply
- 866 views
- 1 follower
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When you want, you can say electromagnetic waves are the fifth aggregat state. It must possible that you can compress it or think anyone other? The solution is ready for it. When you have a hollow ball that reflects waves to hundred percent, then must be the waves thicker and thicker or not? Naturally you must send more and more waves in it. At an example you put the ball on a libra and maessure the weight.
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Reputation Points
- 8 replies
- 1.3k views
- 1 follower
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This is school related, but I ask it as a teacher, not a student. https://wikimedia.org/api/rest_v1/media/math/render/svg/8c6ee5510ba3c7d6664775c0e76b53e72468303a The above is considered the standard form of the Universal Law Of Gravitation. However, if someone gave the following... https://wikimedia.org/api/rest_v1/media/math/render/svg/ebf0689fbd05781a129e2df24ef5bd8b7edf2f93 ...except without the function notation or r-hat notation, would this count as merely derived from the Universal Law of Gravitation, or as a form of it in and of itself?
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- 1 reply
- 917 views
- 1 follower
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Can it be that the radiation pressure is similar with sound barrier? How can you calculate it? My main question is, when we let out the thing with the mass away, is it the radiation pressure that stops you? When this is correct, the solution can be that you made an engine that redirect the radiation over the spaceship. I have an idea for it. Or what is when you made an engine that redirects the air pressure? I think it cant be the mass... Does it stop when the pressure is at its maximum?
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- 811 views
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Reputation Points
- 1 reply
- 1.1k views
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I have learned that a vacuum is a space without matter. In this room, the cathode ray moves forward without distraction. Does the beam really move completely forward, or is the beam still distracted by something else (for example, gravity)? Thanks for your answers
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Reputation Points
- 12 replies
- 1.7k views
- 2 followers
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Hi, Is it possible to increase the density of a solid? Such as metal
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Reputation Points
- 8 replies
- 1.5k views
- 2 followers
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I read that one can distract alpha particles and beta particles, but no gamma rays. I also know that gamma rays are electromagnetic waves (not alpha and beta rays). I do not yet understand why gamma rays can be distracted. Is it because you cannot divert electromagnetic radiation, or is there a different reason? Thanks for your answers
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Reputation Points
- 3 replies
- 1k views
- 1 follower
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I look at the different ranges that have alpha radiation, beta radiation and gamma radiation in the air. Alpha radiation has the smallest distance, gamma radiation the longest. Unfortunately, I do not know why. Can someone explain the different ranges? Thanks for your answers
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- 8 replies
- 1.4k views
- 3 followers
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Why isn't microwaving the perfect way to cook? What is the down side?
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- 38 replies
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- 3 followers
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So according to this video, flying perpendicular to a magnetic field, including a constant magnetic field at constant velocity, induces emf. Assuming it's right... 1. Would the resulting electric field (in volts per metre) be concentrated in the wingtips, concentrated at the center, or constant from the left tip to the right tip? 2. Would the airplane essentially be functioning as a capacitor as a result? If an airplane were flying through a stronger magnetic field (let's say several teslas) would this in turn cause it to form lightning with surrounding clouds? If it were between two clouds, would it attract electrons in one, repel them in another,…
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Reputation Points
- 1 reply
- 3.7k views
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If the gravity is not force but curvature in space fabric what about the things that are attracted by the massive body just beneath its contact with the depression or well formed by the massive body . How to explain that .
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Reputation Points
- 15 replies
- 1.9k views
- 3 followers
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As solar radiation crosses a single glass window, its warming of the room is kept as the heat has 'difficulty' in exiting again trough the glass towards the exterior. In a dual pane window, after passing the external glass, there is little sun radiation to further cross the internal glass pane, warming the window. Does it mean that a room with two glass pane window will allow less solar penetration to warm a room than a single glass window ? (but will insulate better against internally generated heating system losses ? )
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Reputation Points
- 4 replies
- 1.5k views
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My parents order gas for the duration of the cooking days, but then now I got interested in blow torch cuisine, so I'm like, why do we use gas fuel instead of blow torch which uses a liquid fuel? Btw which one is safer, I am afraid it might blow up on my face
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Reputation Points
- 2 replies
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- 1 follower
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How can black hole lose mass by radiating virtual particles of mass equal to the particle it sucks into it as emission and addition of particle is balanced how it loses mass then ?
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- 2 replies
- 1.1k views
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Hi Everyone Lets say we have a an extremely fine powder which is a water-soluble crystalline solid at room temperature. Lets say we also have an oil which is less dense than the powder in its non-powdered form. If the powder is mixed into the oil, am I correct in thinking that it will be much harder for a particle of the powder to fall through the oil than it would be for a feather to fall through the air? Will the settling of the powder at the bottom of the container be so slow as to be almost imperceptible? Thank you very much. Kind regards Tim
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- 2.1k views
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I've been surprised that this report in the local Australian popular press has not tipped interest. calin https://www.abc.net.au/news/2018-11-15/china-attempts-to-create-an-artificial-sun/10495536 My understanding was that once temperature were achieved of something like 60million K that the system would be self sustaining. Here they claim more than that but that it was maintained shortly. What am I missing? Why aren't physicists talking?
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Reputation Points
- 6 replies
- 1.4k views
- 1 follower
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Ok..so I'm in physics and having an argument with my teacher about inertia. He says that in a game of tug-of-war that it has nothing to do with the force, because newtons laws says that its equal no matter what..that part i get and agree with..well there's no agreeing it's correct..anyways so he says the only way to win is to have more friction than that of the other side..this is the part where the arguement comes in. Ok..does inertia affect this, or is it really just ALL friction. I agree with him, but I do think that inertia has something to do with it. -Matt
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- 7 replies
- 16.1k views
- 1 follower
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I am trying to understand if heat transfer from an electric or water underfloor heating system through silicone flooring can be done efficiently, given it's heat resistant properties? There will likely have to be the usual insulation layer(s) between the heating system and the silicone surface, and I don't expect the silicone (think cooking utensils) to be more than 300mm thick. Thanks in advance !
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- 8 replies
- 1.7k views
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Remote delivery drones with some improvements. First of all a remote camera so you can see where it is flying toward, and if someone took your package. Secondly, you can fly it manually, or auto destination. Third, it needs to be big, like airplane big. Four, a good source of battery life.
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- 865 views
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I have some problems understanding the following scenario: Suppose there is a source that emits a single high-energy photon. Suppose that this source is monochromatic and can only emit photons of single energy level, E=hf. The photon travels some time through space and is then detected at some detector (suppose, for example, detectors are all around, and the photon will surely be detected). My question is what if the detector (all of them) is receding farther away from the source at some constant speed? My understanding is that, due to Doppler shift, the detector should detect a photon of longer wavelength - of lower energy. What happened with the rest of t…
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Reputation Points
- 6 replies
- 1.5k views
- 1 follower
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Does a large gas plant fire threaten nearby towns due to atmospheric oxygen depletion
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Reputation Points
- 3 replies
- 884 views
- 1 follower
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