Physics

Hi everyone, I am now working on a project, in which I use a kind of pulse functions as shown in the figures below ( I call them the 3rd, 4th and 5th models). I have spent about 1 month to mathematically generalize the function (the nth order model). However my mathematical background is not good, so I feel unable to do that though I can graphically draw the models for higher order (6th, 7th, ... order). I am now so worried about the problem because the deadline of the project is approaching. So can someone please help me? Thank you so much. the 3rd order model (the horizontal axis is time, and the vertical one is manitude) the 4th order model t…

Hi everyone. I'm hoping someone can suggest a good book (or two) that gives a general but somewhat thorough summary of these two topics. I was considering reading The Elegant Universe, but I wasn't sure if I needed a better understanding of these two areas before moving on to string theory -- unless this book also introduces relativity and QM? Otherwise, some other general introduction (aimed at non-scientists) would be great. Thanks!

Hi all. If a lenght of empty (with atmospheric air) aquarium hose is plugged with beads of silicone sealant at the ends; and placed inside a plain household water pipe... When the water pipe is placed in operation, at say 3 Atm water pressure, the hose inside will contract/deform due to the pressure. Would the plugs at the ends tend to burst outwards or inwards or will not be affected at all ? Just want to confirm am not missing something here... Miguel

Why the anthropic principle and the fine tuning argument have become little more then a reality that slowly a huge gathering of religious types is occurring in physics. Both are little more then logical fallacies based on contemporary human thought that can be hotly debated. ON the basis or the face that they can be debated so easily should be the pointer to them being less then scientific but I want to get a little more in depth then that. It seems that many in academia and above would like to fit various pieces of scientific reality to fit some mold, such as the generation of the entire intelligent falling scheme. I would like to point out that many offspring first of a…

Im studying electric potential in my physics class, and I need some clarification on the concept behind it. The electric field of a point charge is capable of extending an infinite distance, right? Does this mean that electric potential spreads to infinity as well? Im sorry, I should know this by now lol Any info is greatly appreciated...

[This is in reference to an argument attached below that the Ariane 5 core stage can be SSTO with 3 Vulcain engines.] The most important accomplishment of SpaceX may turn out to be they showed in such stark terms the savings possible when launchers are privately financed: SpaceX Might Be Able To Teach NASA A Lesson. May 23, 2011 By Frank Morring, Jr. Washington The SpaceX experience of developing a launcher in the Falcon 9 at 1/10th the cost of a government financed one also holds for the crew capsule development costs since the Dragon capsule cost about $300 million to develop while the Orion costs several billion and still counting. So it can…

A magnet is demagnetized. In a closed system there is a ferromagnet and two chemicals in a packet nearby. If the chemicals are exposed to one another thermal energy is generated. (There will be a decrease in chemical potential energy and an equal increase in thermal energy.) The increase in temperature will be enough to raise the ferromagnet above its Curie temperature. (There are no other strong magnetic fields nearby.) EN1 The chemicals are exposed to one another and the temperature increases. The ferromagnet becomes demagnetized. The demagnetized state is a higher energy state than the magnetized state. EN2 There is a decrease in chemical potential …

In a universe which does not contain any mass what-so-ever i.e. every single particle is a massless one, would spacetime actually exist? Or would existence be simply a zero-dimensional point?

Dear moderators: if this post violates the forum’s rules, please delete it and I apologise in advance. The objective of posting this video link is to encourage further discussion of a mathematical model. This mathematical model can represents and unites those fundamental interrelationships. Therefore, it unites social science with natural sciences, and further, science with philosophy.

(posted in this subforum as I couldn't see where else it might fit) I have searched around on the net and see that this is a question that has been asked often before and the answer is invariably that ; "no,there is no theoretical limit to the rate of acceleration that can be achieved." (not real quotes) If we take a unit mass (is there such a thing? If not can we set mass at a randomly chosen constant ?) can we say that this mass is then subject to a maximum rate of acceleration? Since I imagine that mass may be a term that applies to a system rather than any one particular object then I guess I am asking whether a given s…

someone told me that if u throw a baseball down the field, it will exhibit a wave-like properties( or basically every moving objects exhibit a wave-like properties) I'm just wondering if it's true or not

Every object hanging on a string (like the simple pendulum) will rotate either clockwise or counterclockwise according to the place where it is ,the force which makes this rotation appears in foucault's pendulum , and the force is proportional to the mass of the object, we can benefit from this force by a device I call (mechanical cell) , in which a 4 kilogram mass hanging can lift 1 cc of water to 10 cm height, if we use thousands of such device we can make flood of water to generate electricity. so why any hanging object rotates around its vertical axis ? the planet earth rotates around its axis because it rotates around the sun, the satellite rotates around itself b…

Hello, There is now a new theory in the field of physics that unify the concepts of dark energy and dark matter, add anti-gravity as a new force that is opposite to gravity thus making a balance that can allow variable gravity, black holes are instead black stars, and allow speeds higher than speed of light. It is also "singleverse". The name is "Theory of Ma : Singleverse" can be found at Youtube and Amazon.

Hi, Something I pretty sure about was thrown into doubt this evening by some opinions outside this forum. I'm hoping someone can put me back on track and into my old comfort zone. What is the behaviour describing a perfect bouncing ball in a lossless system ... Now I know it's not true Simple Harmonic Motion (SHM) since we have at one end: the bouncea high-speed drop reaching maximum velocity an 'instantaneous' reversal of direction a high-speed climb starting at maximum velocity [*]the apex a slowing of the rate of climb from maximum velocity to 0 an 'instantaneous' reversal of direction an accelerating rate of fall from 0 to maximum velocity So we d…

What would happen if a 1kg piece of black hole was suddenly transported to the surface of the earth? Would it retain the properties of a black hole and begin devouring mass that it came close to, sinking into the surface of the earth? Would it expand to something much less dense since it did not have the gravity of the entire black hole to keep it in that dense state? If so, what type of matter would it be? Something else?

Sixty Celsius is about the maximum you can handle without burning your hands... That piece of metal left under the sun, or a car bumper, or the beach sand can burn your skin but the ambient temperature is only 30 Celsius. What is going on ? How does the metal gets way hotter ? It is not only the thermal conductivity from the material-to-skin; it is truly hotter. Or seems to be

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…

Quick question that has been bugging me for a while. I was looking into the recent discovery of a new 'Earth like' world, Gliese 581 c, which has a mass 5 times that of the Earth. However, its gravity would only be twice that of our planet. Question: Why is the gravity not 5 times as much if the mass is?

Hello What is the frequency of a pulse ?? I mean >> If we have a wave (crest and trough) and a pulse (crest) which have the same speed what is the wavelength of the pulse and the frequency Do we say that two pulses are equall to one wave so if we have 8 pulses in a second then the frequency is 4 hz or is it 8 hz ?

I need a pun or catch phrase on the either Neihls Bhor or Ernest Rutherford. The pun/catchphrase must me about the scientists experiments and/or their discoveries. Neilhs Bhor discovered that there were orbitals around the nucleus which electrons rise and descend from depending on their energy levels. Ernest Rutherford disproved the scientists before him, who believed in the raisin bun theory, with his famous gold foil experiment. Thank You (in advance) P.S. I`m not a 100 percent sure this is the right place for this question, but if you could spare a few minutes and answer, it would be AWESOME! Thanks again

hi; Let , a ≤ x ≤ b , y1(x) ≤ y ≤ y2(x) ,Let ,V be an interval/region ; a ≤ x ≤ b y1(x) ≤ y ≤ y2(x) , z1(x,y) ≤ z ≤ <z2(x,y) in this case ; might we calculate this integral if we would like to choose our "R" function as any type of light or magnetic wave’s equation ? a∫b y2(x)∫y2(x) z1(x,y)∫z2(x,y) ∇.R.dV thanks

I wasn't sure where to ask such a simple question - so please accept my apology first for my complete lack of knowledge. So... This one simple thought threw me off completely. And I knew it sounded stupid, but I just couldn't get over it! My physic's teacher is out of reach, so I had to turn to the internet for some solid answers. If high level cosmic background waves from the big bang stretched over time to form longer waves (which can be recorded and thus, we can calculate the age of the universe (?)), why hasn't the visible light waves from the very distance galaxies stretched? What is the difference between the visible light of the EM spectrum and the …

Now if an atom shatters, it will result in smaller atoms and some rays, as what happen in an atomic explosion, But what if an atom lose all of its electrons, and remain like that .. is that possible, and what would happen next ?

I was reading articles, when I came upon this "riding a bicycle is safe." from an article on Noether's theorem, What I don't understand, is how was that riding a bicycle is safe concluded, and what is Noether's theorem ?

I wanted to ask if there is an equation out there that describes what is real and what is not. Sort of like a ''mathematical backbone'' that can separate reality from an illusion. Is there such a thing in physics or is it just an individuals point of view?