Physics

Just out of curiosity, how do you go about calculating how much electric power is consumed by an electromagnet made of superconducting material? Since the resistance is zero, it would suggest that the current can be (nearly?) infinite. Wikipedia tells me that the only power consumed in a DC electromagnet is due to the ohmic resistance. Another wikipedia site tells me that superconducting magnets can maintain a current with no voltage applied whatsoever, a property which is used in MRI machines. But what if a magnet does work? What if a charged particle comes near, and the magnetic force acts on it? Shouldn't that alter the current in the superconducting magnet…

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 …

can we get a commercial compound microscope that does not invert the image upside down??

So in my work I've had the pleasure of utilizing the Kramers-Kronig relations numerically to help solve certain problems. I understand the basics of how they are applied and their relationship to response functions. I'm looking for a deeper understanding in the general sense, both in the mathematics and some of the fundamental physics behind their application. If anyone is aware of any resources (review articles, textbooks, pdf's etc.) that could aid me in my plight I would be very grateful. Feel free to give materials that review this from either a mathematics, physics, or applied spectroscopy vantage point. I don't really care. I'm just very interested and want…

What is the charge ? What is its property? Is mass and charge relative? (Means mass must has charge and charge must has some mass)

Its actually a crossword puzzle related to physics. http://pastehtml.com/view/bo1b8dmit.html Here's what I have done. Not sure if all the words that I entered are correct or not. here's the partially completed, changed a few words which were possibly wrong. But still the word Diversion doesn't fit.

... we must first understand exactly what hyperspace is, where it resides relative to matter space and how it functions within the universe. I'm of the opinion that we will only be locked within the confines of chronology protection if we lock ourselves to only understanding material space. Hyperspace generally refers to Kaluza-Klein's 80 year old concept that there is a dimension of existence that takes up the values between "photonic speed matter" thus it involves faster moving particles. What if it is also complimented by a "hypospace" where all moves slower; the tachyon only combining to form the present through sympathetically interfacing with the tardyon?

If the fourth dimension is spacetime, is any 3D object that moves through time, now a 4D object?

Have you seen the movie 'top gun', in it there is a incredible fighter aircraft F-14 tom cat. Its flight is like a boeing airbus thrust?

300,000Km/s ? Why isn't it some other number?

I was reading about "Quantum Entanglement" .. and one explanation was saying that if we have two dices that are quantum entangled, if we roll one for N times and it result in N ordered outcomes, if we roll the other N times, we will get the exact same outcomes ... Not only I'm shocked by that example, but also confused .. my question is simple: what is quantum entanglement exactly ?

yeah, im fascinated by the possibilities of there being black holes and worm holes up there somewhere and im intrueged by what would happen if something went into one :L i attended a 'science live' day in birmingham and we spoke about it quite a bit there. but could anyone go into more detail and explain to me more about black holes and worm holes?

I have had difficulty finding webpages that accurately describe the tide-raising force, and that show how to calculate it. So I have now produced my own. http://squishtheory.wordpress.com/the-tides/?preview=true&preview_id=210&preview_nonce=69cba02793 I show how to calculate the tide-raising force, both by differential gravity, and also by the difference between centrifugal forces and gravitational potentials. Once I had figured out exactly what needed to be calculated, the maths was quite straightforward. It would be helpful if anybody who has struggled with the concept of the tides, would like to tell me if my explanations are sufficiently clear; and al…

My book says r^3/t^2 was found constant by Kepler. What this constant is called? How is acceleration equal to v^2/r in case of circular motion? Why is rate of change of momentum or say product of mass and acceleration equal to force? Why not was it ma^2? How was it proved that it is equal to ma? How newton showed that a spherical body of uniform density behaves as if whole of its mass is concentrated at its center? Also, why is it that a symmetrical body of perfect density balances about the point of center of gravity? What are the latest and advanced means to calculate the value of acceleration due to gravity? How do we estimate mass of a double star? These questions…

Hello! I have a problem, but since this isn't for school I figured I wouldn't put it in the homework section. Okay, so here it is: I need to calculate the resultant temperature of two bodies of water mixed together. The issue is that this is not a classic mixing two liquids in a beaker scenario. The complication is that the two bodies of water are the bottom of a reservoir and an input pipe. Because this is an open system, any water added by the input pipe will mix with the bottom of the lake (and yes, only the bottom because we need to maintain the natural stratification of the lake) without changing the volume of the lake because any water added to the syste…

[THE ULTIMATE UFO SCHEMATIC] VERSION #1 OF (X) COMPONENTS: - VERTICAL BUOYANCY SYSTEM - HORIZONTAL PROPULSION SYSTEM - SYSTEMS TO NEGATE G-FORCES - SYSTEMS TO NEGATE AERODYNAMIC DRAG 1.VERTICAL BUOYANCY SYSTEM PURPOSE: To ascend vertically. To ascend vertically you can use conventional propulsion techniques , such as using explosive materials , or physical applying a force to the air directly around you creating lift. In this case we'll be using a more unconventional technique , which utilizes earths magnetic field , as the medium for creating vertical lift. Earths magnetic field is , as its name states , just a magnetic field .…

If matter controls time (the denser the matter the slower time passes) does that mean if we could create an area in space that had no matter effects such as gravity at all that time would rush forward?

I need better Understanding of Diffraction. Also I would to understand this diagram

I would like to know answers from science, to these following questions. Please answer What is the time? Which observe the time passing? Who experience the time passing?

This is a question: Is it possible, starting from a geometric description that uses only proportionality, to construct a system that ends up with some kind of unit, like kilogram, meter, second or ampere? Intuitively, I would say no.

If everything is energy and different types of energy react to each other, then why couldn't telepathy and telekinesis be possible?

Would things stop moving if the universe stopped expanding? And does the universe accelerate at the same rate in its expansion everywhere? Thank you.

Neutrinos only interact Weakly. Er go, neutrinos are generated into Weak eigenstates, which are "mixtures" of the canonical mass eigenstates; and neutrinos remain in those Weak eigenstates, until detection. For example, electron neutrinos [math]\nu_e[/math] are a mixed Weak eigenstate, representing a mixture of the neutrino mass eigenstates [math]\nu_1, \nu_2, \nu_3[/math], specifically [math]|\nu_e> \approx 0.9 |\nu_1> + 0.5 |\nu_2>[/math] The following analysis employs normalized units [math]c \rightarrow 1[/math]; and assumes that the neutrino mass eigenstates, are also eigenstates, of mass [math]\left( \hat{m} \right)[/math], momentum [math]\left(…

Having just conducted a experiment in which I levitated a small neodymium magnet above a liquid nitrogen cooled YCBO superconductor, I was wondering if anyone knew of any factors that affect the height at which the magnet levitates at (e.g does magnet strength affect it?), and whether this applies inversely (i.e does a stronger magnet allow a superconductor to levitate higher above it?). In addition, I was wondering whether anyone could think up an inexpensive (under £100, ($~170)) way to keep liquid nitrogen above the superconductor, which is 1" in diameter, in order that it remains at its critical temperature. I had thought of a half ping-pong ball and have yet to try t…

The most coveted prize in particle physics - the Higgs boson - may have been glimpsed, say researchers reporting at the Large Hadron Collider (LHC) in Geneva. They need more evidence to claim a discovery. Sources:http://www.bbc.co.uk/news/science-environment-16158374 http://richarddawkins.net/articles/644214-lhc-higgs-boson-may-have-been-glimpsed