Physics Lab: what happens if we ignore gravity?
So I did this lab: http://www.physics.ryerson.ca/sites/...pcs125/SHM.pdf Essentially, we have a mass that was attached to a vertical spring with as little friction as possible. We let the mass reach...
View ArticleKilling vector
Let us denote by [itex]X^i=(1,\vec 0)[/itex] the Killing vector and by [itex]u^i(s)[/itex] a tangent vector of a geodesic, where [itex]s[/itex] is some affine parameter. What physical significance do...
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Optics - Do I live in a smaller world with glasses?
Okay, question, do I live in a smaller world than people with normal eyes? I noticed that when you look over your glasses (minus 3.5) half through the glasses and half to the real world, that the...
View ArticleWhy are microwaves reflected by the door?
Hi, I am wondering why microwaves don't escape through the door? The most common answer seems to be that the wavelength of microwave ovens is about 10-15cm which is much larger than the 1-2mm holes in...
View ArticleHumming Notes 1/2-lambda apart
A question my friend gave me the other day: If I start humming a constant note and, once 1/2 a wavelength exits my mouth, I start humming the same constant note starting at the same point along the...
View ArticleHow can I power a Peltier Thermoelectric Cooler
Hi I recently purchased a small (15mmx15mm) Peltier Thermoelectric Cooler/Heater. I am using this for a prototype of mine but I can't find a way to power it. The specs are 1Amp 0.8Volts. I was just...
View ArticleCoulomb gauge
Hello, just had a quick silly question about the coulomb gauge here, though I guess it applies for gauge transformations in general. The problem is, I'm concerned about my gauge choice not being...
View Articledomain of validity of classical electrodynamics
i am currently reading griffith's book on electrodynamics, though he does an excellent job with the theory (along with all the sloppiness in math) he does not really answer the question, how well does...
View ArticleMagnifying Glass and Eye Glasses Comparison
Do glasses work in the same way that a magnifying glass does. They take light and focus it onto a point? If a magnifying glass can burn an ant, do eye glasses burn our eyes to a certain degree? Could...
View ArticleSuperposition of waves, result visible?
hi... Got to ask about superpostion of waves... When two coherent light waves cross each at some point in space moving in different directions, do they superimpose? If they do, do we need a screen to...
View ArticleRotation of rigid body
In the framework of Classical Mechanics,there is no problem in the rotation of rigid body.But I want to make the concept about rotation more clear. About rigid body ,there is no vibration;it would only...
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Path Calculation of point mass in gravitational field
Hi, I am trying to derive a formula for the path taken of a body in a Gravitational Field using Classical Mechanics. I have attached a pdf file with my derivation so far. Basically I used conservation...
View ArticleParticle acceleration for Hyper drives?
I vaguely read about this idea about using particle accelerators as hyperdrives Does anyone know any more information about this subject?
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Gauss Law and Electric Field of a Dipole
Hi, I don't understand this: You got a dipole, and a resulting electric field from it like this(hyperphysics): As z approaches infinity, the field becomes zero. But if you draw a gaussian surface round...
View Articlework to close valve
Hey! Yesterday I was on the Czech Physics Olympiad. There were many examples. To one, however, I did not invent anything, because I don't learn Hydrodynamics to much. I want to understand it better, so...
View ArticleChemitrails/Contrail and factors
Do you know chemtrails? http://en.wikipedia.org/wiki/Chemtra...spiracy_theory I want know more about it! Please, help me. I want scientifically prove it is condensing lines to my friends. I know this...
View ArticlePHI constant
Hi, In the equation y(x,t) = ym * sin(kx - wt - PHI) I thought I understand why we have that phase constant atleast mathmetically but after thinking about it I don't think I understand it completely...
View ArticleMagnetic flux and C-EMF
A friend of mine told me that in order for Back-EMF to be generated, The flux lines has to be parallel. Is that true? This question is based on a electromagnet - magnet set up. The flux lines must be...
View ArticleLocalized classical configuration of E and B, a basis to build up dipole...
Suppose we are far from a 1000 watt source of constant radio frequency electric dipole radiation, say R/λ > 1000. Suppose this antenna is in outer space so there is no matter to make things more...
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