Classical Physics

Suppose you have a heavy flywheel rotating about a spindle in thr [latex]X[/latex] axis at a considerable rate of radians/sec. Now suppose you have another one on the same spindle -- same mass, same diameter, etc, but colocated and rotating in the opposite direction. What will happen if force is applied to rotate the spindle about the [latex]Z[/latex] axis? (I'm guessing lots of resistance, leading eventually to catastrophic heat transfer.)

I'll probably get slapped around for this, but I'm looking for moderately dumbed-down texts about magnetism. The sort of 'whats' and 'hows' I want to know include things like What [common] materials make the best electromagnets? (I.e., most powerful when energised. least retained magnetism when de-energised.) What are the best materials for an air-cored electromagnet closed at both ends (such as for an oscillating actuator)? If I use electromagnets along an air-core channel, what should the spacing be? The strength? What do the field rise and fall curves look like (so the next can be energised with minimal loss to the falling field of the previous on…

https://techxplore.com/news/2018-12-atomic-clock-exact-dark.html Scientists have invented a new clock that keeps time more precisely than any that have come before. The clock is so accurate that it won't gain or lose more than one second in 14 billion years—roughly the age of the cosmos. Its ticking rate is so stable that it varies by only 0.000000000000000032 percent over the course of a single day. That level of exactitude is not really necessary for those of us who rely on clocks to get us to a doctor's appointment on time, or to know when to meet up with friends. But keeping time is just the beginning. This new clock is so exact that it could be us…

Could you advice me some free of cost and good modeling software which allows to model solid state and atomic physics? For example model such things as CMOS capacitors made of different exotic materials including graphene, semiconductor devices similar to diodes, spintronic devices, ferroelectric capacitors and similar staff.

Hello, is it even possible that Einsteins definition of simultaneity is incorrect? Based on his paper I wrote down a number of reasons why I think the definition is plain wrong. (The paper I quoted from you can find clicking the link below). I. KINEMATICAL PART § 1. Definition of Simultaneity (p.3) -"We arrive at a much more practical determination along the following line of thought. If at the point A of space there is a clock, an observer at A can determine the time values of events in the immediate proximity of A by finding the positions of the hands which are simultaneous with these events. If there is at the point B of space another clock in all respec…

https://phys.org/news/2018-11-defy-19th-century-law-physics.html#jCp Researchers defy 19th Century law of Physics in 21st century boost for energy efficiency: November 21, 2018 by Anna Ford, University of Sussex: Research led by a University of Sussex scientist has turned a 156-year-old law of physics on its head in a development which could lead to more efficient recharging of batteries in cars and mobile phones. Dr. Jordi Prat-Camps, a research fellow at the University of Sussex, has for the first time demonstrated that the coupling between two magnetic elements can be made extremely asymmetrical. Working with colleagues from the Austrian Academy of …

Hello everyone! The Argentine submarine ARA San Juan last reported on November 15. On November 23, the Navy published that two hydrophone stations operated by the CTCBO, meant to detect nuclear explosions, heard a non-nuclear explosion near the possible position of the submarine, suggesting a total loss of the ship. My information isn't at the source, alas - data from Twitter, and so on. Signals, positions of the hydrophones, timescales https://twitter.com/SinaZerbo/status/933745155399708674/photo/1 do you understand too that the three blue-to-red histograms are strongly amplified, hence the scale does not apply? I suppose the blue histogram maybe fits th…

Hello, just a question. I searched the internet for an answer to how exactly a beam of light behaves when it’s source is moved perpendicular to the direction of its own propagation, in vacuum space. I didn’t find a clear explanation, only a few remarks. Perhaps the Ligo interferometers give details on this? Thanks.

If the Earth is in fact orbiting the Sun and hurtling around a super-massive black hole, then wouldn't centripetal force be at work thus creating a slightly more intense pull towards one side of the Earth and vice versa for the other side. I came up with an equation for this and it seems to make complete sense due to how the weight (not to be confused with mass) of an object seems to change depending on the proximity to its planet's equator. Centripetal Force divided by the rotational velocity of the object determines the difference in weight of objects on either side of the object if the object is moving. Could this be possible?

if someone were to create a perfect-ish hollow sphere that was about a foot wide and was super reflective on the inside and they put a light like an led bulb or something inside of it then closed it what would happen? my hypothesis is that there would be a lot of heat with the light bouncing around so much. what would happen if you increased the size or decreased the size of the sphere its self including the size of the hollow area inside? thanks for reading and thanks if you comment too!

How do I i find a wave source (location where its transmited from) if I have where the wave is transmitted to (the destination) and I have the right measuring equipment? Which measuring equipment is needed?

There is something very familiar, known from the first steps in the study of electricity. It is the capacitor of parallel plates. Nothing is mysterious in that capacitor. That does not diminish the relevance of a peculiar property. The force between the plates is independent of the separation of the plates. Separated by 1 millimeter, or separated by an astronomical distance, the force has the same value as long as the charges remain unchanged. Richard Feynman used to mention that property to the students, to encourage the attitude we call open-mindedness. In the parallel plate capacitor, the force vector has the direction of a line segment comprised between the plat…

If a particle presents as both a particle and a wave. Doesn't this mean that as a particle it has to be under constant acceleration? Would an expanding universe have anything to do with it? Note- I am not thinking that I am suddenly going to puff up like a balloon, but I am thinking that if the universe is expanding then I and everything in it must be constantly accelerating. Just wondering if the thought is correct? I also am seem to be thinking that acceleration generally presents as a curve thus a wave? The greater the curve the more gravity displayed, more interaction. Essentially, slowing down. Until there is equilibrium, no more exchange. The sma…

Is the gradient of the action equal to the amount of movement?

Hello everyone and everybody! Fibre lasers produce a high quality beam up to very few kW output and with excellent power efficiency. Nice to cut steel sheets for instance. But 2kW in D=100µm and er=2 make already 7MV/m, and the material's breakdown doesn't allow much more. To obtain more power from several fibres and keep the phase coherence among them, I propose to synchronize the phase by evanescent waves. With a cladding thinner than usual, fibres side-by-side share some light, and if done often enough while the laser light is produced, I hope the bundle emits coherent light. This shall be easier than a single oscillator driving independent lasers amplif…

In these 3 fields: 1. An electric field 2. Magnetic field 3. Gravitational field

Let us say you were on a bridge about 1km long and 150m wide made out of concrete and some kind of metal framework. If the bridge was suddenly about to break for whatever reason, structural problem maybe, and so if you were to simply tap on the bridge then it will all break apart and fall into a sea of water that it is under. You tap the bridge and so it breaks into many pieces and falls into the sea of water below it. My question is, is energy input from a simple tap equal to the amount of energy released from the breaking of the bridge? If so how so?

How can I keep condensation from forming on the inside of a sealed cup that goes from a hot truck to a fridge? I plan to use vacuum sealing, only having enough room for the product so there is less air in the cup and maybe using a gas, like nitrogen, to seal the cup. The cup is going to be 2.5 centimeters in diameter and 2.5 centimeters tall. The cup will hold a single-pill that that will have a moisture seal applied to it and there will only be enough room to hold the pill. My worry is the heat from the delivery truck and then being placed into a fridge-like atmosphere will create a water droplet, thereby ruining the pill\product. Will thicker walls (insulation being the…

In real life if a block slips (in contact always) on a wedge then which force is responsible to maintain the ratio i.e ay/ax = tan (theta). I mean to say that y direction has 'g' but what is in x direction? Theta= angle of inclination! I know if all the surfaces are frictionless and wedge is not fixed then the wedge and block both will slide so ax would be caused by a pseudo force but what about in real life where wedges don't slide?

What will be the normal force by the ground on the wedge?Am i doing correct please help and if not then what is wrong? Please guide.

A Piezo igniter causes a spark. Is it the spark that ignites the gas, or is it the heat generated by the spark? I remember being told a long time ago that if I were foolish enough to grab the wire when handed to me by my ex-work partner as he pushed the button, that what I would feel when he pushed the button would actually be skin cells exploding due to a rapid over abundance of heat. What annoyed me the most about him was that he was usually always right. That and the fact that he was always nonchalantly saying,here hold this while trying to hand me the wire. Was he right?

I try to find my mistake about that device: After a while the device is like that: My logic : the device without the spring conserved the sum of energy, so I add the spring and I watch what I recover and what I need, the sum must be at 0 too. But here I find a difference, I don't find my mistake.

Let us say you put the pendulum in position A (which requires energy), then you let it go and let it swing and swing until it suddenly stops. Would energy it took to put that pendulum in position A be equal to the amount of kinetic energy produced by the swing of the pendulum till it stops. Also what is the resonance of an oscillating pendulum.

Hi, I want to go to college to be a theoretical particle physicist, and I was wondering what degree(s) I would need for that. I looked around and was unaware about if I were to get a degree in particle physics and choose to be a theoretical one, or do I get a degree in theoretical physics and just assume that I research in particle physics(assuming all of these degrees exist). I’m only 14, but I wanted to go into life extra prepared.

What I've found online so far just completely boggles my brain right now. I've never been too good with math, but anyway I am trying to learn.