Physics

HI, I wondered if anyone could help me please. I am being hit in my home by some kind of radio frequency/microwave radiation. Its been going on for over a year and i believe is the cause for various health issues i now have. I purchased a Acoustimeter AM-11 RF Meter and its picks up a reading of anything from 30 to over 100 microWatts per square meter every 10 minutes. (sometimes it can go even higher) The reading lasts for about 2 seconds but its happens every 10 minutes at the exact same time. Due to health issues i am unable to leave my house much so am under constant "attack" Can anyone tell me if this would be dangerous to my health and if it could be…

https://biomedscis.com/fulltext/the-effects-of-solar-activity-and-geomagnetic-disturbance-on-human-health.ID.000203.php ''m) Solar activity may contribute to the development of and be a trigger of the exacerbation of nervous and mental disorders, such schizophrenia, Alzheimer's disease, and multiple sclerosis [38].'' https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5805718/ https://blogs.biomedcentral.com/on-health/2019/09/19/geomagnetic-disturbances-and-cardiovascular-mortality-riskutm_sourcebmc_blogsutm_mediumreferralutm_contentnullutm_campaignblog_2019_on-health/ ''Our results may be explained through the direct impact of environmental electric and magn…

I believe heat is one of the greatest losses of kinetic energy. For instance, whenever energy is transferred some is lost in the form of heat. Take for instance when you fire a gun, when you pull the trigger it causes a hammer or pin to strike the primer which sets off the propellant. The propellant is the source of the gun's power. When the propellant is set off it burns and expands, releasing kinetic energy which forces the bullet out of the cartridge, down the barrel and out the muzzle. However, at the same time tremendous heat is produced which is why guns get hot when you fire them. Same thing with cars, a car works by the gasoline being ignited in the cylinder which…

Hello guys, I am attaching an exercise and the the given answer. I have two questions regarding the answer. There is one more force on the cylinder that creates an anticlockwise torque about its center of mass, and this is the component of its weight that is in the direction of the surface (pointing down the slope). Why didn't the exercise consider that force for the overall torque, as well? As per the answer: each side of the coil exerts a magnetic force Fm = NBil. But this is the equation regarding a magnetic force's magnitude on a wire only in case that the magnetic force and the wire are perpendicular to one another, which here is not th…

Before you say, "This goes in speculations!" I must tell you that this is not theoretical and is built upon well-known laws of physics such as the conservation of momentum (Mainly the conservation of momentum). So, now I will tell you what this is. Basically, it is a framework for finding the dynamics of fluids split into three laws and three equations. The first law states that the velocity of a particle (Like an atom or molecule) in a fluid is proportional to frictional forces and momentum. The second law states that a group is a group of particles that have the same properties of each other. A group is usually formed when particles of the same mass and properties are …

"Capacity to do work" says phisics. I thought definition was specification of "whatness" nature of the phenomenon. I think 'Capacity to do work' describes more abstract concept and seems an answer to a question "what's energy for?" Is energy an entity or a property?

Interesting video on how voltage passing through an electric wire is being compared to waves passing through water.. The whole thing is worth watching but at 10:25 is where the results of the experiment is really starting to show..

Since several of you have told me you can more easily read my arguments about entropy if I don't use Þorn ('Þ'/'þ') and Ðat ('Ð'/'ð'), I'll go back to using "th" in my physics arguments for now. As this is a physics forum, I've transfered the discussion about letter use to a thread in the Other Sciences forum (I've found no forum specifically for speechlore). Only in the following paragraph do I use Ðat and Þorn, but you can skip it if you wanna get to the intrysting part, aka the physics. Again, swansont locked my entropy þread, saying ðat my statement ðat I wield ðe English alphabet be a bad faiþ argument in his estimation. Well, his estimation is clearly wrong, so…

As I understand entropy and the Second Law of Thermodynamics, things stand as follows: A closed system has a set Mi of possible microstates between which it randomly changes. The set Mi of all possible microstates is partitioned into macrostates, resulting in a partition Ma of Mi. The members of Ma are pairwise disjoint subsets of Mi, and their union is Mi. The entropy S(ma) of a macrostate ma in Ma is the logarithm of the probability P(ma) of ma happening, which is in turn the sum Sum_{mi ∊ ma}p(mi) of the probabilities p(mi) of all microstates mi in ma. The entropy s_{Ma}(mi) of a microstate mi with respect to Ma is the probability of the macrostate in Ma to which …

Hi! I'm new to this forum and signed up to ask a few questions from my course. 1. Lambert's Cosine Law says that radiative flux over an infinitely small area is largest at the perpendicular normal angle. But when the same flux is at an angle, the flux is spread over a larger area and is then proportionally smaller. This can be described with the equation E [perpendicular] = E [perpendicular] * cos(zenith angle) Is this correct? Have I described it right? 2. I have read about Lambertian surfaces, or perfectly diffuse surfaces. Is Lambert's Cosine Law assuming the target of the irradiance is a perfectly diffuse surface? Or is it assuming t…

As a curious person, I like taking knowledge and shoving it into my brain as fast as possible. I also like quality knowledge. What are the most useful pdfs you have ever read? Can you share them with me? Thank you for your time reading this.

If photon is really massless then how it can take up energy ?

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I have already admitted I was wrong in generalizing for massive particles. In the wave-like behavior actually the momentum p appears, not the mass. De Broglie wavelength is actually defined by their momentum p which is different for them (λ = h/p) at same velocity. But for massive particles there is a relation between the momentum p and the mass m... May be I should rethink about what I have said. The point is that in general, waves are not associated to a mass but De Broglie law precisely combines both. Definitely I must rethink about... Better to say that the wave-like behavior also omits the concept of mass although it plays a role in the determinatio…

Two particles of opposite charge attract themselves. It is necessary energy to separate them apart. This is something that appear to not be considered in fundamental well known particles interactions like the free neutron beta decay and in the positron-electron pair creation. In the energies' balances are only considered the rest energies of the particles and not the energy between the two particles separated apart. I think this energy is not negligible at all, on the contrary, at subatomic scale the particles can be very close and the electric potential energy between them could be very high. I don't understand why this subject does not appear in any energy balance of ex…

Greetings. Those solar sails proposed for space probes collect the impact of photons to provide propulsion. I think. The photons stop moving when reach/hit the 'solar sail' or always bounce and keep going at the speed of light ? Is the collision to those sail surfaces the one that creates a force as reaction from their action ? How different is from a boat sail and wind ? The photons from the sun reaching earth provide some push ? How many photons hit the earth per unit of time; is there a tiny shift of the orbit due to reaction to photons ? -Explain as simplistic as possible, please-

Few questions based on the analogy with light/sound waves. I suppose most cannot be answered strictly, but at least give me your hunches. 1. Should I expect that gravitational waves may reflect when they hit some sort 'wall'? Can such wall exist? Can we have phase-change and non-phase-change reflections? Can you suggest a 'wall' (either active or passive) that causes phase-change or non-phase-change reflection of gravitational wave? 2. I suppose gravitational waves can interfere? Is this a linear or non-linear process? 3. Can we imagine a standing gravitational wave? Can we imagine resonant cavities for gravitational waves (possibly allowing …

I'm an installation artist who works with social interactive concepts which point at how we affect each other, even if we never directly encounter each other. I'm working on a new piece and I have some questions about heat. I am looking for a material which a person might lie on. If they were to lie still, the warmth of their body would be imprinted for a time onto this material, and if someone else were to touch the material, even, say, ten minutes after they left, the new person would be able to feel the warmth of the other's departed body with their hand. Perhaps sharply so. Were that new person to lay on this material, they would feel warm for a time, until the …

I hear the proportion of science graduates to jobs is not good. What do people think my prospects would be if I study BA physics or astrophysics wanting to be a research scientist? I wouldn't want a job designing aeroplanes for Boeing, I'd wanna be discovering planets! Besides a degree what sort of work experience would potential research institutions want? Would I need MA/PhD? Cheerz GIAN xx

Japan is dumping tritium to the sea. Is there some use that can be of benefit for mankind ? Can it be concentrated embedded in -say glass- or concrete, or something and kept safe; perhaps retrievable if the future needs it ?

In the macroscopic world we are made of hydrogen carbon oxygen etc. But in the microscopic world of sub atomic particles,matter and anti-matter can annihilate,producing electro-magnetic radiation.According to big bang theory we only exist because there was an excess of matter over anti-matter.If there had been an equal amount of matter and anti-matter the universe would not exist. So what are we made of,(something that can both exist or not exist)?

Before I get into this, I am sorry for saying I was 'lazy' a while back. I was very tired that day and I am not a lazy person. Anyways, imagine you have a two-dimensional line that is just for measuring energy. the more negative you go; the more potential energy is stored. The more positive you go; the more kinetic energy is let out. I was just wandering if there was a way to measure the speed of the KE and PE changing (kinetic and potential). I was thinking KE+PE t (over time) but it is up to you guys to decide whether it is right or not

On page 4 of Gravitation by MTW I read, Here seems to be a mistake. Although motion, or more generally, causality is local, there exists other physics, which is non-local. This 'jump' from motion to physics seems wrong. Was such a 'jump' Einstein's mistake?

Could this concept work? because microwave oven heats x time faster. https://physicsworld.com/a/national-ignition-facilitys-ignition-milestone-sparks-fresh-push-for-laser-fusion/ It is possible that masers could be used for nuclear fusion, but there are some challenges that would need to be overcome. Masers are similar to lasers, but they emit microwaves instead of light. Microwaves have longer wavelengths and lower frequencies than light, which means that they can penetrate deeper into matter. This could be an advantage for nuclear fusion, as it would allow the masers to heat the fuel more evenly. However, masers are also less powerful t…

Does anyone know whether there would be any interesting applications if we could somehow figure out how to selectively extend the range of the Strong Force on the matter occupying a desired area? I recently finished reading a sci-fi book where a hostile alien species attacks the solar system with a probe like this. It says that they extended the range of the Strong Force from the subatomic to the molecular range, resulting in the probe being effectively indestructible (essentially it had the strength of neutronium but without the enormous mass). But I have no clue whether there’s any realism at all in the idea, even assuming that such a means of manipulating the fundament…