Exist current source?
Which is the real interpretation for current source? Exist some device or electrical object that acts like a current source?
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Open electrical circuits
I was thinking, a circuit don't need necessarily be a circuit, can be something like this: How compute the voltage of a circuit if the voltage of the source is different of the sink? Also, how compute...
View ArticleHow to determine specific heat capacity
I have been looking for specific heat capacities of certain materials such as steel but i can never find a solid answer, so i figured i would test it myself, how would one test specific heat capacities?
View ArticleFuids - vorticity from viscocity
If invisid flow starts with no vorticity then no vorticity will be produced. This can be understood intuitively: we note that of the three types of force that can act on a cubic fluid element, the...
View ArticleDerivative of current and voltage
Exist some physical quantity for the derivative of the current wrt time? Exist another too for the derivative of the voltage wrt time?
View ArticleFluid Flow out of a Liquor Bottle
I was working on a project for which I was considering letting a liquid flow out of a bottle rather than pump it out, but I know that the flow rate changes as the height of the fluid within the...
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About memristor and memristance
1st) Can you think in the reciprocal of the memristance? Can you give me a theoretical definition (or just a notion) for it and a term/jargon too? Dewey Larson proposed the inverse for all electrical...
View ArticlePrinciple Determining the Loudness (Intensity) of Sound
A test question I was asked earlier in the year has been hanging around in the back of my mind: "If a radio is moved 3x further away from you, how is its loudness affected?" To answer this question one...
View ArticleSpring: K.E. - P.E. relationship; Request shorter procedure
Question:- A block of mass 10 kg moving with a velocity of 1 m/s collides with a spring of force constant 1000 N/m. Calculate the compression of the spring at the moment when kinetic energy of the...
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Association of sources
How equate the voltage/current of the associated sources with the voltage/current equivalent? Attached Images CP.PNG (6.2 KB) CS.PNG (3.7 KB) VP.PNG (6.5 KB) VS.PNG (3.9 KB)
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Transformation Y-Δ with matrix?
See: http://en.wikipedia.org/wiki/Y-%CE%9...transformation Is possible to express the following relationships: using matrix?
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Oscillator driving frequencies
I've attached a graph to this post. Why is it that the periodic external frequency applied never starts at 0 on graphs like these? Attached Images 1200px-Resonance.PNG (209.5 KB)
View ArticleFleming's Right Hand Rule
Can I use Fleming's right hand rule to determine the direction of current when a magnet is moved into a coil(s) of wire? I am finding it difficult because the magnetic field and movement are parallel...
View ArticleWhy don't charges fly off a conductor?
To be concrete, consider two parallel conducting plates, one positively charged and the other negatively charged. Why doesn't the electric field between the two plates pull the charges off the surface...
View ArticleNew Optical Device!
Wow! A physics forum! Here's the device I filed a U.S. patent for, so I'm wondering what to do next? http://www.youtube.com/watch?v=wYgfRzxc-Hs I've talked to the chair of my physics department and he...
View ArticleIs the current a kind of circulation?
I know what is circulation by a mathematical point of view, but in the reality (in the physical world), what is circulation? I'm thinking that the electrical current through of a circuit, that the...
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2nd Kirchhoff's law for all passive elements
How would be the 2nd Kirchhoff's law for this circuit here: I'm asking because I don't know how is the behavior of the inductor, capacitor and current source wrt the 2nd Kirchhoff's law... Attached...
View ArticleHow is the division of the current for all passive elements?
The current always prefers the path with minor resistance, but how the current reacts wrt the inductance and capacitance?
View ArticleDerivation of Rayleigh-Jeans law
All the derivations of the Rayleigh-Jeans 'Law' I've seen assume that the electromagnetic radiation is enclosed in a cube. I'm trying to derive the law using less arbitrary circumstances. That is, by...
View ArticleConditions for Double-Slit Interference in Quantum Mechanics
Hi, there Today, a friend came to me and asked the following questions and they made me confused. If the source is strong, the light has to be considered as wave, and the double-slit interference (DSI)...
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