Classical Physics

Standard bicycle ball bearings offer very little resistance. Magnetic bearings create a small amount of resistance to movement. The idea of magnetically levitated bearings has been done before in military aircraft for the propulsion system in the late sixties on a prototype F-14. They also rotationally powered the levitated impeller in the pump with a 400-hertz inverter. When in trials against other planes, the pilots turned off the fuel-powered generator and ran on batteries, and the other planes had no firing solution without a heat signature. Having a plane in the air, they had no firing solution for infuriated some, and the plane was shelved. Today this would not be a…

Hello, dear music lovers! I often read that a broader bore gives wind instruments a mellower sound. This comparison holds for the bugle and tuba versus trumpet and trombone, but I claim it should not be extended to woodwinds, especially not to double reed instruments. Make your opinion with two bassoons, both playing very well Saint-Saëns' sonata French system Heckel system More artists have played the sonata, and in every case the Heckel bassoon is prompt to become tinny. The instruments diverged in the 19th century. The French bassoon continued to evolve, but less so than the Heckel system, which was a more radical development from the older instruments. The …

Could we tell there exist principal difference between simple coronating electrode which employs corona discharge to create unipolar charge supply and a high beam current electron gun which employs either high field or thermionic emission to do the same with exception that beam in el. gun is collimated? Could we tell that an electron gun is capable to create principally larger amount of electrons than coronating electrode?

Hello! I'm new to this forum and I have a question concerning an interesting thing that we have seen in our kitchen at home. We were renovating some things and decided to move the microwave for a moment. That is when we discovered that there was an actual hole in the wall, slightly bigger then my palm and half a fingernail deep, at the side od the wall where the oven was sitting for many years. So it was in the corner, the ventilator from the oven was facing the counter, and when in use, both the ventilator as well as the oven did not give away much heat. And we did not use the oven that much. A few times per day for 30 seconds to maybe a minute or two. So I d…

Practice shows that circular movements always give a more powerful blow. For example, a mangual(the type weapons such as a load on a chain, this word seems absent in eng? How it correctly?) beats more powerful than a hammer. In martial arts, circular strikes are always more powerful than straight ones. There is a feeling that the centrifugal force gives additional energy to the impulse

I am looking to fully grasp the concept of what "free energy" means in terms of thermodynamic systems. I understand why free energy is the amount of work that any system can perform, which represents an amount energy itself. But I dont understand the stipulation of "at a constant temperature". And what this mean for equilibrium vs non equilibrium thermodynamics. I was hoping for a real world example of a system using equilibrium thermodynamic and non equilibrium thermodynamics. I understand that if you put a sealed plastic bag, full of water at 80 degrees, into a tank of water at 60 degrees, that thermodynamic equilibrium will cause the heat energy from the…

Is gravity acceleration (g) per unit mass (kg)?. It must be. Gravity = mass (m) x g. This then means that gravity is purely acceleration and all objects fall at the same rate in vacuum regardless of their weights. Gravity = m x g, i.e. Kg x g /Kg = g.

In another post, asking about free energy, someone mentioned Helmholtz, and I looked into Helmholtz and I discovered the Helmholtz machines, developed from his ideas that the brain is a "statistical inference engine". Does Helmholtz imply that a "statistical inference engine" can create models from observed functions and their noted effects without really knowing anything about the nature of the "process" being observed? Does the Helmholtz machine prove him right? Is he right? Thank you.

Let say we have a hollow dielectric tube in which a cloud of unipolar charge (electrons) is moved by flowing gases from emitting cathode to anode. Then this charge returns from anode to cathode through an external circuit and a load. Could you help me to calculate at least very approximately what maximal space charge density in the tube and subsequently current density at the load could be achieved, if the gases move charge in the tube with the sonic speed, approximately? And what power density at the loaf (per kg) could we expect from such device very approximately?

whenever i discharge my leyden jar with thumb (external plate) and index (internal plate), the discharge happens in index (internal plate). Whenever i discharge with pinkie (external plate) and tablet of activated carbon held between index and thumb (internal plate) it discharges in pinkie (external plate). well how to make it discharge in internal plate while i hold the tablet.

Perhaps the Earth needs an Atmosphere warming event cycle. Prior to Man Made Global Warming perhaps the Earths Natural Processes achieved the Cooling and Warming Cycles on its own. Perhaps a reduction in Volcanic Activity presently. Has created a Man Made need to help the Earth in its next warming and cooling cycle. These are all questions every young scientist must ask themselves. Throw out all previous explanations and truly work out these possiblities.

Does anybody know what is the best material for GaN substrate? I know that there is a problem with GaN epitaxy (I’m interested in MOVPE) which is the absence of its own substrate. Thanks in advance.

Let us imagine we have a huge classical body moving in a vacuum and we want to measure its position and velocity. Is it better to bombard this body with electrons or photons? My uneducated guess from a layman: With electrons because they can convoy more information than photons. Both electrons and photons can be observed at specific places at the sensor (or bubble chamber or whatever), but electrons will change their velocity as a result of the collision. So you have 3d data: change of x velocity, change of y velocity, change of z velocity. But photons only change their frequency as a result of the collision. So you have only 1d data! Am I right?

Dear community! I've recently come across following intriguing thought experiment: Imagine a jar filled with water where infinitesimally small particles of iron dust are dissolved. The average particle diameter is small enough that they do not descend, therefore they are randomly distributed in the jar (high entropy). Now you take a magnet and hold it next to the jar - after some time has passed, the density of iron particles on the magnet side of the jar will be significantly higher than the density at the opposite side. Considering entropy, such a behavior should only be possible if the total amount of entropy increases or at least stays the same. However, this dem…

I designed a magnetic propeller, which is in https://vixra.org/abs/2102.0146 It does not use fuel and rocket. It generate propellant force by magnetic force (Lorenz force). It will send people to Mars and even further.

Hello, I’m about to embark on a campervan conversion, I need to carry a considerable amount of fresh water to supply taps and shower, I’m intending to use 6x 25l water drums, from these 6 drums I’m hoping to be able to connect them up in unison so 6 hoses running to the bottom of each drum and then joining to one feed pipe to a pump, I imagine that the force of gravity will mean that all 6 drums will empty evenly, if I’m wrong on this please correct me? This however is not my question or at least not the question I’ve really come here to ask. So what I’m really wanting to know is whilst it would be feasible to remove each drum to refill I wondered if it would be …

First off let me preface this by saying I have limited education and if my idea is wrong / already been tried I'd love to know. This is purely an idea (very basic one) no working out has been done. Recently ive been thinking about how we could measure the 1 way speed of light. I thought about the idea of not measureing the time light takes to travel a certain distance, but the time it takes to travel a distance comparative to another entity moving a similar speed. For instance an ion / proton from the LHC. Not measureing the time from 1 gate to another instead measureing the time between light and another entity. I would appreciate comments on whether this…

Consider a space ship in near/far Earth orbit. Suddenly accelerates to thousands of mile an hour instantly. Would the astronauts be slammed to the rear of the vehicle or would the fact that they were only subject to micro gravity (mass but little/no gravity to act upon the mass) they would not be so effected? In short, in the absence of gravity (I understand that there is "microgravity" in Earth orbit) is law of inertia (bodies at rest remain at rest), in effect? Please explain it to me like I was a six-year old.

Dear forum, So I was curious about methods through which to simulate gravitational interactions and while I know there are numerous methods through which to numerically deal with multiple individual bodies I decided to find one to deal with general mass distributions. The model in question having ignore their interactions through non-gravitational forces or add in any accumulation of mass (formation of planetesimals) but still account for the change in the density distribution as well as the distribution of velocities. Firstly the primary equation in question that would be used is gauss law of gravitation to calculate the current gravitational potential distri…

Do I have it right that charges move from the area of higher potential to the lower potential. Would this be the reason why charges move away from the source towards the load? Is the source really the highest potential in an electrical system? Or is it both the highest and also the lowest potential? Charges regardless what we consider to be either positive or negative doesn't change what is happening in terms of their movement. Then we have the dynamics of not just the movement of charges but the movement of energy itself as it propagates. Energy propagates in a different vector. Energy does not seem to care about the direction of charges but seem to only…

I don't know if this is a foolish question or a decent one, I don't know if there is any official subjective answer to this, this query is popping in my mind and lately I can't stop myself from thinking what the scientific or 'physical' cause might be.... Please don't mind if it is a question of a darn fool cause I am only a high schooler from India. XD Suppose a strong man of mass M is pushing a wagon with a force F ,which contains load of same mass M. His force overcomes the static friction and acceleration is caused in the system of the load and a wagon and it moves. But consider a case, where the man of mass M is standing in the wagon(in…

Hi. Another video 😉 but short and no need to see it all; just time stamp 0:30 shows the spheres shaking. How is the spark producing forces ? I could imagine if they where suspended, the motion would show greater. ----> https://www.youtube.com/watch?v=s8704VbBKbw

Hi, good day to all. Two identical houses (materials, height, shape) are next to each other but only one has a lightning rod installed. Other houses in the immediate neighborhood have no lightning rods. A block north, and a block south, and a block east and at a block west there is houses with lightning rods installed. An electric storm is more probable to strike the lightning rod on the house that has one or the roof on the identical next to it ? In other words, a lightning rod attracts and conducts electrical strikes to ground or forms a zone that prevents the lightning from striking ?

How (or why) does an electron negate all the force of a proton? Explanation (reason) of question: 1> All forces act uniformly in all directions. Explanation of 1(above): a) If you lit a light source (like torch or light bulb) you can see it from every direction. Which means light travels in all directions (3D) uniformly. b) Similarly (to 'a') a mass (of an object) will interact with all other masses (objects) in all directions. c) Similarly (to a and b) an electron moves around a proton (nucleus) in 3D space i.e. in all directions. Conforming to '1' that all forces interact with objects uniformly in all directions. Q>>> So…

I have tried to go through a proof for this which is used in physic texts: $$\nabla \cdot \vec{A}=\frac{\mu _0}{4\pi}\nabla \cdot \int \frac{ J(r')}{|r-r'|} dV'$$ again we use $$ \nabla \cdot \frac{ 1}{|r-r'|}=-\nabla' \cdot \frac{ 1}{|r-r'|}$$ If you go through the equations you would obtain that you could write: $$\nabla \cdot \vec{A}=-\frac{\mu _0}{4\pi} \int J(r') \cdot \nabla' \frac{ 1}{|r-r'|} dV'$$ Then they look at the integration as from integration by parts $$\int_{-\infty}^\infty g \frac{\partial f}{\partial x} dx = [gf]_{-\infty}^\infty - \int_{-\infty}^\infty f \frac{\…