Physics

Initially, I was a smidge unsure where precisely this question should go, seeing as it isn't quite chemistry based, but at the same time, having a knowledge of physics that would, at best be deemed mediocre, decided to put it in the general thread. I appropriately apologize to any moderator, whose unfortunate duty it may be to rectify the error. Anyhow, to get to the point, I am interested in why ferro, dia, and paramagnetism occur, in various compounds, as while I'm sure everybody knows the nature of the effects, it surprises me that I haven't thought about why such a phenomenon occurs. As always, any aid is most appreciated. "No, you have the largest cookie mr. hip…

Link Link This research appears to be application-driven, but I'm personally more interested in the fact that the phenomenon occurs at all and only when the light is confined (compressed? excited?) within a nano scale. Electron degeneracy comes to mind for some reason, although unrelated. I'd appreciate someone pointing me to some resources so I might better understand how this works. Specifically, I wasn't aware light could have attractive or repulsive properties.

So my question to you is : Is there any element that if a stimulated using a wireless frequency, would create heat/energy? I.E. : If gold created heat/energy when stimulated in said way, would that heat/energy be able to be converted into electricity, for example. *Note that I am just a stupid 16 year old who doesn't know anything, so don't hate on me too bad if what i'm saying isn't making sense...*

Does anyone use the Kangen water system? A dentist friend just bought the system, and claims that drinking Kangen water has made him feel more healthy, stronger, energetic and more. He gave me a dvd which I just started to watch. Kangen water seems like it's almost too good to be true ... !!! If this is for real, then everyone should be drinking Kangen water. Unfortunately, you can't keep the water for more than a couple days, because the water breaks down, and looses its special properties. I'll search for some webpages to post .... I wish that I could afford to buy the Kangen system, but it's way out of my price range ... Merged post follows: Consecutive…

I'm pleased to announce a new book about particle colliders, the LHC and the search for unification: Collider: The Search for the World's Smallest Particles by Paul Halpern Advanced praise for COLLIDER: "Professor Paul Halpern takes the reader on a stimulating odyssey on topics ranging from particle physics and dark matter to unexplored dimensions of space. The masterful Halpern likens the physicist's quest to the excavation of archaeologists who seek to uncover 'new treasures' as they unearth wondrous gems that lay hidden all around us. Buy this book and feed your mind!" —Dr. Cliff Pickover, author of Archimedes to Hawking and The Math Book "Wit…

Question: If the universe is expanding and accelerating for 13.7 trillion yrs. When will we exceed light speed? What will happen to time if we do? And if we are moving away from a point how do we calculate the time and distance if speed is inverse to time. by standown

Hi everyone, I asked the same question in another forum but couldn't get an answer... My question is this: since the human eye can detect or see only photons or light then are electrons, neutrons and protons visible? Can electrons, neutrons and protons really be seen?

pls do help me on this......... in thermionic emission nucleus of the thermionic element is not strong enough to hold the electrons in the outer orbit which means that the meson particle which mediates the strong force between the protons and neutrons in the nucleus is having the less limited range than the electromagnetic repulsion of the protons. isn't it? and thermionic element is said to have high mechanical strength. my doubt is that if the element is not having the strong nucleus how they will have the high mechanical strength?

Hello, I'm short-sighted. When I look at a small light source from a distance, it appears as a disk (see "circle of confusion" in wikipedia), because I'm not correctly focused. However, I noticed it's a textured circle, with lighter and darker spots, each a having a size ~ 1/10 - 1/20 th the diameter of the circle of confusion ( it looks a bit like the speckles in http://en.wikipedia.org/wiki/Speckle_pattern ). Does anyone know what is the origin of this phenomenon ? The texture doesn't change upon blinking (ie, moving small particles on the surface of my eye). The texture appears regardless of color (white, green or red LEDs were used). Thanks for your help…

does silicon melt in an induction heater? i know its a semi metal and a semi conductor so i'm wondering what it does

Ever wonder why most weather travels east ?. Does weather blows or drags along ?. Try spinning your car tire and put your hand next to a spinning tire and air travels in the same direction as the tire. Our earth does the same thing and air is not blown in but rather draged along.

could someone please explain how low pressure hg lamps work and provide a link to a diagram showing the components etc. please be as detailed as possible. perhaps include how they are made?

When I was a teen and our San Joaquin valley had supper sonic jets over our valley that rattled windows with sonic boombs. Shock waves can be seen visually. There was a supper sonic jet over head with a thin cloud layer and about 3/4 mile behind there I saw a large shock wave following. The shock waves travel in straight lines one after another.

If you take away all the matter in space what is left. There would be no time and no mass, only light.

I am a student wanting to get involved into Physics earlier then what my school offers, can anyone teach me some Basic physics?

So we're doing an experiment at SSU in the physics lab. And we're trying to find the specific heat capacity of ferrofluid under a magnetic field. Only problem is the ferrofluid rips through it's container when we turn the magnet on. Anyone have suggestions as to a material for the container?

I know that Time is relative to the observer but at t=0 for any observer does that mean that t=0 for all other observers anywhere?

Hey all, I was wondering; we have points A, B and C in space, where |AC| = some big number, say a million light years and |AB| = |BC|, and an inflexible pole from points A to point C that would be fixed at point B. Now person X is standing at A, and person Y at C. Person A moves the pole in some way (rotation, displacement, angle, you name it). Would the change in the pole's rotation/position/angle/whatever be apparent immediately to person Y? Cheers, Gabe

So can gravity be explained as movement through the fifth dimension or as a change in the rate of time?

Can someone explain the Brane Theory. And did it caused the atom of the big Bang ?.

How to Change One Metal into Another? Example : Iron to Golg

what happens when you put a metal compound in an induction heater? will it melt like it would if it was the metal? will it decompose? will it combust? or will it do something else? i'm just curious to know:D

Something I never understood about the concept of time travel. Where are the previous states of the universe stored? The information must be preserved in order for the time traveler to immerse himself in that previous state of the universe. I've searched many threads here and haven't seen this addressed.

Ok I solved the last one past exam question by myself but this one has been bugging me for days, any help would be appreciated. A composit wall consists of three materials a, b and c, two of which are of known thermal conductivity ka=20W/mK and kc=50W/mK and known thickness La=0.3m and Lc=0.15m. The third material which is sandwiched inbetween a and c is of known thickness Lb=0.15m but unknown thermal conductivity, kb. Under steady state conditions, Ts,o(temp on surface of material c)=20°C and Ts,i(temp on surface of material a)=600°C. The temp inside T∞=800°C. The inside convection coefficient h=25W/m^2K a What is the value of kb b What are the temperat…

I just need some help with this past exam question. A counterflow concentric tube heat exchanger used for engine cooling in a very hot enviroment has been in servive for an extended period of time. The heat transfer surface area of the exchanger is 5m2 and the design value of the overall convection coefficient is 33W/m2k. During a test run, engine oil flowing at 0.1kg/s is cooloed from 110°C to 66°C by water supplied at a temperature of 25°C and a flow rate of 0.2kg/s. a. Calculate the operating convection coefficient b. If the ambient temperature is 50°C give a possible reason for the discrepancy