Physics

Help needed: I have a C-shaped permanent magnet as on the picture A). I sketched magnetic field lines between magnet poles... very close to the magnet, there is a current-carrying wire (perpendicular to your monitor plane). Some of the magnetic field can reach the wire and so I know the wire 'feels' a force F. In the picture B) there is the same setup, only now I plugged the gap with some magnetically permeable iron insert. My question is will the wire now feel a force F'? Is this force higher, smaller or equal to F? Can you explain what is happening?

Newton's law of universal gravitation states that F= g (m1 x m2)/r², i.e. a particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. In Newton's view, there need to be two masses present for gravitation to take effect. It has been proven by general relativity that gravitation occurs with just one mass present, as it is not a force which acts upon objects per se, but rather on the space in between them. This all makes sense and Newton's law still holds true, as any two masses will behave in accordance to his equation. Howev…

What do you guys think about Lichtenberg figures ? In my opinion it is awesome. Im using a type of thin plywood known as 'underlayment' or 'backing board. Its basically a thin, 3-ply plywood with very thin wood veneers on either side. This works with any wood, but this type of wood gives the most consistent and best results.

which is which?

I was at the beach one afternoon in Australia Adelaide, I was young so I didin't think much of it but when I was running towards the shore (About average belly button deep) the sand under my feet was collapsing, I don't really remember it all that well but i'm pretty sure it lasted around 3-5 seconds, I was really scared so I attempted to sprint underwater. The only thing I could really think about (All I know about) is that it could have possibly been Angel Shark(s) but like I said it was in the afternoon so I doubt it. Thanks in advanced!

Einsteins relativistic train in tunnel paradox. There is a video on YouTube with this title. Towards the end of the video one person sees the length contracted train fall into the gap. The person on the train seems to see it become like a fluid that flows into the gap*. How can the train behave like this * i gather that this because the train is not completely rigid

|\/\/\/\/\/\/\/\/\/\/\|======================== ---> Took 356 Newtons to compress a spring 0.5 metre. A 1 Kg rod contacting its end gets pushed when the spring is released. Is that enough data to calculate the acceleration, or : Took 356 Newtons to compress a spring. A 1 Kg rod contacting its end gets pushed during 0.1 second when the spring is released to full extension. Is that enough data to calculate the acceleration ? What formula should be applied ? -Ignoring friction, drag- Is the calculated acceleration result the one at the end of spring extension; at position 0.5m away and 0.1 second from firing ? ( The initial force applied to the …

Is there any difference as to how a DC magnetic wave effect the relative permeability of an alloy, compared to an AC magnetic wave?

What is the difference between AC and DC magnetic properties? And what should I be aware of when calculating penetration depth?

Which Metal/Alloy has the highest relative permeability at 12 Tesla?

Praise without end for the go-ahead zeal Of whoever it was who invented the wheel! But never a word for the poor soul's sake Who thought ahead, and invented the brake. I've seen a lot of ink spilled (electrons manipulated?) about massless propulsion, and I realize that it could potentially be used to accelerate a ship "in reverse" to act as a brake, but how would its energy consumption stack up against the following idea, assuming the idea could even work? Given: Some form of drive has been developed that can get a ship up to a significant fraction of c Given: A power source sufficient for the job and materials that could withstand the rigors of use Given: Relativity te…

I was wondering about this: If you have a rod made of indestructible material. And you attach the one end to a motor and spin it. 1 sec per round. And you extend the rod so it reaches about 47.746.482m radius. What would happen to the rod? Ofc this contraption is in space

Hey guys, I would like to present this question to people whomever out there is highly knowledgeable in the field of acoustics: Given these facts: Soundwaves can travel through solids, air & liquids. Scientists can move objects through measuring wavelength and intensity. Energy can be produced and conducted through soundwaves. Enthusiasts have created small to midsize drones that can carry up to 50 lbs. along with supersized drones that lift a human. (See YouTube.com) Why doesn’t someone combine these technologies to do two things that would be great for protecting our troops in combat fields: Create supersized, solar powered drones that can fly 2,000 to …

Hi guys. Does anybody have the answer to this question? I'm really struggling with this one.

I know that an electric current can create a magnetic field, but can it strengthen a magnet field of a piece of steel if I charge it? The piece of steel already has its own magnetic field, so if I charge it with, let's say a AA battery, will it strengthen the magnetic field? If I was using a metal detector, would it cause the metal detector to sense something stronger if the steel is charged?

What is the average concussive yield of a basic combustion chamber in average car. The PSI of the explosion if you will. If the same amount of gas is applied what is the maximum possible size/ shape of the chamber in the engine? Thank you.

For my curiousity sake, I want to ask this question to you guys who are scientifically inclined individuals. Is Q.F has a cause or not?

Hello All )) Do we know, what is our material`s avarage frequency? Formula E=mc2 and energy is always wave motion, so we have to have own hertz, which is typical in our known world. We have different light-and radiowaves, but what is the maters frequency? In atoms and nucleons has own hz. If no one knows that, who wants join to group, to think.... It will change world and will explane a lot in quantum and there will be totally new science area.

So I don't have much of a background in physics, since I haven't had the opportunity to take it yet, but I'm really interested in theoretical FTL methods. So my question is- What would it take for some sort of spacecraft to accomplish the speed of light or faster. I understand and methods are probably theoretical I just don't understand the math involved just yet, so I'm hoping for some clarification.

Light consists of quanta(small packets of energy). Then how do we explain doppler effect of light the same way we do for sound? What is the valid explanation of light doppler effect which is consistent with the photon picture?

Some countless websites on Google claim that there is life beyond death but what does science have to say about this especially biology, chemistry and physics? Is life after death just wishful thinking or is there some science beyond this? If evolution is indeed true and humanity indeed evolved from more fundamental forms of life, does this mean that there is no life after death?

I'm a non science graduate and trying to understand Einstein's theories as a beginner. In the relativity theory, as I understand it, if a person went on a trip to space in a rocket that travelled close to the speed of light, when they returned to earth they would appear younger in relation to any observers, who in turn would have aged more. But what I don't get, is that you could look at it as though the earth was moving away from the space traveller at the same speed (relative velocities) - so who is really moving away from whom, and why does the space traveller age slower and not the observers in earth ?

So I am really interested in the idea of a floating land mass or land masses from anime and movie and I am generating if not drawing some ideas on how to make it a reality. Now keep in mind I want to keep this floating land mass perpetual, which I want it to stay floating for as long as possible, therefore I'm not completely rejecting but I think the idea of a hot air balloon might not work here since you would be ascending and descending based on the temperature. The helium balloon has a chance of breaking but if you manage to contain it as a permanent source let me know. My idea is on vacuum, with every liter of vaccum you can sustain a weight of 1.28 g according to Wik…

As a human being, are we have the capability to distort space?

Nebular theory states that the solar system and other galaxies starts from a gas nebula.We all know that the nebular cloud has a uniform composition.Then how come for example in our solar system, every planet has different composition? Which it should be in the same composition? Feedbacks are very much appreciated.Thank you...