Physics

There is considered hypothetical decay of proton - usually into positron and neutral pion, which quickly decays into two photons. Such decays would allow standard matter to completely change into EM waves (proton + electron -> ~4 photons). So this decay allow to get to more stable state and temperatures in collapsing neutron stars should make it easier - it suggests that neutron star instead of creating a mysterious matter state (black holes), should 'evaporate' - turn its core into photons ... I've looked at a few papers and I haven't found any considered this type of consequences? If this process requires extreme conditions to be statistically important, it wo…

EMR, electromagnetic radiation is emitted from the Sun? EMR is made up of a visual spectrum been several different wavelengths and also has invisible wavelengths, such has radio waves? EMR as an whole, a collective, with no interference of its natural state, is transparent? A light bulb , a naked flame, a flashlight all emit a form of EMR? Light is apart of EMR and is said as single particles are known has a Photon? Photons and emr is mass less and do not have a Physical body? EMR has potential energy? Whenever you can see, EMR must be present? EMR is always isotropic from the source? EMR is apparently present in th…

Passing a conductive fluid as seawater trough a permanent magnet pipe; will it create electrical current ? How to 'collect' that current ?

In a reference frame of an object been rotated from a central point on a bar in a circular motion, is the torque directed along the bar centrifugally with no centripetal force acting on the bar?

I have been considering mph , and I do not understand how mph can be true , when a curvature velocity running parallel to a linear velocity at the same mph travels slower compared to the linear. Can someone explain how this works?

Would you agree that electromagnetic radiation in the range of ~400 to ~700 nm. allows us to see in the dark?

Does an equal polarity of the same magnetic force, in magnetism, repel and not attract?

Hello everyone Another question, based on an equality from my biomedical physics course: [math]\int_{A}^{B}{\vec{E}\mathop{}\!\mathrm{d}\vec{l}}=-\int_{A}^{B}{k\cdot\frac{q}{\vec{r}^2}\mathop{}\!\mathrm{d}\vec{r}}[/math] Question is simple: why? (Note that I may have written some mistakes with vectorial notation in the integrals) Thanks! F.

Is being exposed to too little radiation harmful?

In electricity, I often see + symbols and - symbols, positive and negative, I often have touched two positives together on a low voltage system, meaning a battery, to see sparks! Is it a correct assumption that two equal polarities can not touch and force each other apart? Does the Sun emit electrical energy? Does the Earth emit electrical energy? Does a positive attract a negative when talking about electrical energy?

This is not a question of religious beliefs but a question of scientific facts, concerning the 2 seas that meet, but 1 doesn't mix w/the other. http://m.youtube.com/watch?v=WzbiRqpaIAg http://m.youtube.com/watch?v=AQ16NM60FsM Can someone from over 1400yrs ago, who could neither read nor write, possibly have such detailed knowledge of, speak on w/accurate descriptions, things that has only been stumbled upon, discovered, explained, and seen in our century. W/the aid of very high tech equipment. Like the Hubble, the Sonogram, Deep sea diving equipment, etc. Using my own reasoning and logic and plain commonsense, puts the question out there. That "Qur'an," mentions in…

The purposes of this topic are intended for but not limited to creative discussion, learning, hypothesis and theoretical discussions. Is it possible to create an artificial self-sustaining planet? self-sustaining in terms of Earth. If the above question is possible then,can that planet be as large as a Galaxy and if not, can it be "of substantial size" relative to the Galaxy? Galaxy in terms of the milky way(our galaxy) If the above is possible then, can that planet or whatever you may call it be able to function as a spheroid that exhibits the characteristics of both a galaxy and a planet? I have to be honest that I am not what you may call a knowledgeab…

How much energy can a house brick absorb? How much energy can the Earth absorb? If by thermodynamics a magnet starts to reach its curie point and loses its magnetism force, what effect is the thermodynamics having on the molecules in the magnet? Hot metal expands, and increases mass by adding energy/heat, what on a molecular level is happening?

I thought it would be helpful if we compiled a It's of physics theories, maybe for cross referencing and citations in physics posts. I've got a few; see if you can find more to list. Links would be great. My noob list: -Abstract Quantum Theory -Markov chains (discrete classical probabilities) and information theory -Theory of Quantum States and Measurements, and its resulting concept of entropy -Least Action Principle (fundamental expression of classical mechanics, reversible phenomena) -Conservation Laws (macroscopic approach of classical mechanics) -Symplectic Chaos Theory (continuous probabilities in reversible phenomena. Examples: study of stability of planet…

It is my understanding that nuclear fission (rather than fusion) is used for energy because it can release energy in a a stream of smaller packets, where fusion releases one big mass of it. However, research is still being conducted on the possibility of fusion energy. This leads me to wonder- what exactly are the restrictions in this situation? Are there just no reactors strong enough to withstand the forces produced? Would the way we use fission energy be substantially different from what we would do if we could use fusion? Also, does nuclear transmutation have any practical application whatsoever? Could it( I.e. To produce extremely rare or valuable elements)?

My science teacher once told me something along the lines of if you are not connected to the ground you can safely touch electrical wires because the voltage throughout is the same. I've seen videos on how large electrical wires are maintained somewhere near some mountains, the maintenance guy uses a special rod that connects the rod to the wire with electricity and after a few seconds it is safe for him to climb on to the wires without being shocked. I've also seen an experiment on youtube where a bunch of people grab an electric fence and stand on insulators such as wooden tables and plastic containers and buckets. What exactly is required to shock a person? Does t…

Every high-tech fan is probably fascinated by the idea of holograms. Whether it's to have their TV or computer monitor projected in mid air, or to see floating transparent images replacing the old rusty billboards in their city. Unfortunately however, I've yet to see any holograms in real life... even videos of a functional one being tested in a NASA lab. The best I've seen are transparent screens and smartphones, or persistence-of-vision clocks (a fast spinning blade with LED's on it). Still, this shouldn't be too far from becoming possible, and I'd like to know what could be realistically expected and when. From a scientific perspective, it's not hard to see why the…

Hi, I'm going to build a Joule Thomson Air Liquefier for my research, I will use 7 Bar air compressor, I wonder is that pressure enough to operate. Stages 1. Air Inlet and compressed to Primary Cooling Core 2. Primary Cooling Core (This is Coolant, which are filled with Dry Ice, Ethanol) 3. Main Cooling Tower 4. Liquid Air Output 5. Regeneration

What is class B amplifier and where it is used ?

Perhaps some smarter folks could assist me in thinking through this, but I think something important from physics is missing. There are several theories out there that support the universe being made up of different possible units, one such example being information theory, where information is the basic unit of the universe. What makes these theories so interesting is their outside of the box nature, and a different approach to much of the same data that makes up more classical theories. That is not to say any such theories are proven, nor provable, but I think its a good thing physics is moving into new arenas. Perhaps it's not quite as scientific as we would desire …

I understand that it is always better to check experimentally. Given that... A particle and anti-particle pair of equivalent mass are created from an amount of energy equivalent to at least twice the mass of the particle or antiparticle. This energy, say a gamma photon, was previously affected by a gravitational field in accordance with its mass-equivalent energy. After the particle and anti-particle come back together and annihilate, energy conservation dictates that the equivalent amount of energy is produced, i.e. the same gamma photon. This photon continues to be affected by the previous gravitational field. Is it possible that the matter and anti-matter partic…

Electroactive polymes.A type of material that reacts upon an electric current goes through So, planning on doing an EAP refreshable board for the school science fair.the purpose is to help the blind. How much does it cost,because most people who are visually impaired are the poor (WHO data) I would be grateful if anyone has any theory on creating a book reader for the blind

Should mass vanish if 0 Kelvin is actually enforced into a system?

I have done some minor research on antimatter and how it can be both beneficial as well as harmful for us humans. So here's my question - About 5 kilo of antimatter can produce enough energy to power earth for a millennium, but it is also enough to completely obliterate earth. Do you think we should invest money into antimatter research? Why?

I am now studying in secondary school. Most of the time I have encountered classical physics, stating gravity is a force, time is constant, distance/displacement is constant, mass is constant, electrons orbit around the nucleus of atoms, etc. Anyone who study Modern Physics would immediately know that the above statements are wrong. If wrong(some may argue that it is just incomplete), then why continue to teach wrong ideas, and then only try and start to correct somebody when he/she is in university. But by the time he/she is in university, it is too late. The very firm idea that gravity is a force, time is constant, distance/displacement is constant, mass is constant, el…