Classical Physics

This is a view of an electric arc using an apparatus of William Gurstelle. Can an electric arc jump a vacuum gap?

Im curious if electric fields interact with each other. I'm not referring to interraction between particles with electric charges. Thanks.

Will or could someone steal it and take 100% credit? I joined these forums for help because I want to discover something. I think I did, and if someone else tried it then there are more aspects to make this possibly work... Where do I go to make sure I get the credit? its a theory keep this in mind.. I would be more than happy to share my "theory" but I want to have the chance of testing it first.

so, in theory, if u have motor strong enough to reach that kind of speed, if you have road long enough, will he reach it or will he just lose control and crash/go airborne? Plz i need detailed answer from someone who knows what he/she is talking about... Thanks

Hi guys, I'm relatively new to physics, so please bear with me. Let's image we have a cylinder like this, filled with 8760 mm3 of liquid, with a nozzle on one end and a plunger on the other. An explosive charge goes off behind the plunger, releasing 45 joules of energy, and pushing the liquid out of the nozzle. I want to calculate 1. how far will the liquid go, before dispersing into mist? 2. what is the optimal shape and size of the nozzle, to make the liquid go as far as possible? Where do you think should I start? Thanks!

Hey everyone, I have some questions about a mechanism with permanent magnets. The first attachment (magnet1.png) is an engineering drawing of a design of one of the magnets needed for the mechanism. The cross section at top has a gap where a magnetic field is presented to open space, rather like a horseshoe magnet. This shape is extruded around a full circle into a doughnut form, shown in the bottom plan view. The field present in the gap is intended to be radial, centred at he doughnut centre, but only present in the gap - this is illustrated in the second attachment. The second picture (magnet2.png) is a functional diagram of the whole mechanism. The red and blu…

An object stays in uniform motion until acted upon by a non-zero net force... Ok... But there tends to be an object like air that will cause oxidation and a material to dissipate/rust over time, right? So, is that more in the realm of quantum physics or what?

Why doesn't the frequency of light change after it is perfectly refracted? Is it because of the conservation of energy?

...Consider a planet which moves from A to B in a small time dT...under polar co- ordinate system let the radius vector be r vector from the origin o. that is OA = Ob = rvector angle AOX = y angle BOX = y+dy therefore change in angle is dy now let the planet move from A to B in small time dT....let it cover a distance dSvector ...here dA ( the area covered by the planet in time dT) = 1/2 rvector x dSvector dividing by dT .... dA/dT = 1/2 rvector x dS/dT ..... dA/dT =1/2 rvector x vvector multiplying and dividing by 'm'.. the mass of the planet .... dA/dT = 1/2m (r x mv) .... dA/dT = 1/2m (r x p)............. 1 differentiating 1…

I haven't thought about aerodynamics since secondary school and it rather baffled me back then. Is this something I could simply think of in terms of an integration of the angular momentum of point particles, conservation of angular momentum, and surface friction? Are there more detailed equations that can be used that do not try to explain by sacrificing detail? I don't see why I can't do as I mentioned in my points and I can model this sort of behaviour fairly accurately on a computer without mashing my brain cells.

So in a vacuum, it is or its not constant? I see that this topic is debatable and were not really sure yet if light moves at a constant rate in a vacuum or not. Can anyone give me any information, books, links, etc on the subject?

I didn't want to do this ( I prefer to do my own research) but desperate times call for desperate measures. I just started my freshman year in high school and since I plan to take AP physics my senior year I should tie that into my epic senior year science fair project, and I have the perfect idea. I plan to build a particle accelerator capable of colliding sub-atomic particles to produce heavy elements OR producing low power neutron beams. Anyway I plan to use electromagnetism to rip asunder a hydrogen atom into free protons and free electrons as protons have a positive charge and vice versa. Unfortunately I ran into a speed bump in research. Here's my question. How …

The diameter of a tennis ball is 2.63 in. The size of a particular room is 43 ft X 10.5 ft X 30 ft. How many tennis balls can fit in this room?

Hello guys Im new to this forum I want to make a planetarium with a current video projector when I use my projector below the dome I get a flat picture I want to cover spherical whole the dome like other planetariums how can I build a fisheye lens to do this job easily because i need a accessory to expand the field of view of my projector ? do you think I can do this job with convex mirror ??

Dears, I am investigating a way to make an engine that can run continuously. I do not declare that it is a perpetual motion. However, my result until now is so positive. 1. Tools and facilities: - The main component of this model is a wooden toy with dragonfly shape. Its head is a rectangle which is curved upward, with long tail - A sharp pillar with a steel marble stick at the head 2. Model - The tail of dragonfly shaped specimen is put with a small weight to make sure this specimen settles down toward the tail. - Then, touch the sharp peak of the rectangle head of the specimen very slightly into the marble so that it does not drop down - The balance status of …

Hey, this is myfirst post. Im simon from sydney australia. i have a question that is running around my kitesurfing forum about how the ambient temperature effects the power behind the wind. So 30knots of wind at 2 degrees Celsius compared to 30knots at 25 degrees Celsius. most of the people on their understand the density changes due to the temp, therein lies our main question...does a cold wind have more power at the same wind speed. our kites average from 6sq meters to 19sq meters. would there be any noticeable difference? thanks in advance for any light shed. please when replying remember we are notthe brightest bunch, lol. So keep the answers …

My understanding so far. Electrons can respond to any EM wave regardless of wavelength. Ideal conductors have completely free electrons, and thus there electrons can respond to any EM wave. Now if I grate a plate of metal (which is assumed to be an ideal conductor) with holes larger than the wavelength of an incoming EM wave, how can the wave "escape"? Surely the electrons in the metal surrounding the holes respond to the incoming wave, and if so, I guess they should absorb the energy in the wave?

consider light getting refracted by a prism, the red light with the least frequency gets refracted the least. and the violet with the highest frequency gets refracted the most. now consider skywave propagation. the waves with higher frequencies escape without being refracted and lost into atmosphere. and those with lower frequencies get refracted enough to return to earth which contradicts what we saw in prism. The reason i cud thin of was that the refractive index of ionosphere maybe less than 1 or even negative and the principles of refraction gets reversed or somethng... but this is not a solid thought. can you help me ?

How does lightning rods really work?? I know that it protects the building. But they do that by providing a conducting path of electrons OR neutralizing the air above it. The internet mentioned about both points. But don't u think that if the latte happened, the former won't occur? Which is the main reason?? Why??

pictures.pdf The question is typed and drawn out in the PDF files. I think that the last result will happen. I also think that the true result can be calculated using the normal distance from the centroid of the object to the point tquestion.pdfhat the moments are summed about (the pin). But I can't figure it out and its keeping me up at night, someone pleases help.

What is time ? A question I was asked by a science student set me thinking. Some years ago a brilliant young physicjst, Joao Magueijo calculated the exact time of the Big Bang but failed to get the deserved kudos for his work, due mainly, I believe to his not explaining the delay between the event and the beginning of time and light, so here I will attempt to do just that. First we need to look at black holes, or rather, what happens at the Schwartschild Radius. It is here that both time and light cease, but space continues right in to the singularity, so time can not be an element of space, therefore it must be tied somehow to light. Light ceases…

Hi, This is my first forum post. Thanks for offering such a nice resource. If my post is in the wrong place, please move it and tell me. Was not sure if here or chemistry would be better. I end up needing science answers from my choices of reading material, but don't have much of a science background. Ideally, from your answers, I'm hoping for two things: 1. Online source for a graph showing the relationship between pressure (psi, etc.) and potential energy (in some unit of measure) of compressed air. Something along these lines, but with correct axis labeling, etc.: http://www2.chemistr...r_vapor-ans.gif 2. I'd like to understand a couple of re…

Okay, now this may seem a little.. philosophical, but it's a question I have been asking myself for years, and haven't so far found an answer to. Say we have an imaginary universe with only two reference points, one star and one planet in it. Furthermore, from the perspective of the planet, it appears as if the star is rotating. So far so good. But now imagine there's a human on the planet with a telescope, and he asks himself: "Am I going to fall into the star?". Given the information we have here, I think it's impossible to answer. The planet might be orbiting around the star, or the star might be revolving around itself while the planet is stationary. In the fi…

Does anyone on here have use of sophisticated 3-d plotting software?

Discounting the real problems of digging such a hole, such as huge air magma, pressure, heat etc! If you could dig a hypothetical hole half way down to the center of the earth and your weight was 100 kilograms on the surface, what would you weigh at the bottom of the hole?