Thermodynamics, PVT graphs
Hello, I'm wondering if anyone knows of a comprehensive site that might contain PVT diagrams that show all three axes on the same graph, NaCl, O2, NH3, etc. More so the simple elements and compounds....
View ArticleMagnetic field of a dipole in co ordinate free form
Hello everybody! I am writing this topi because i got stuck in this!I have a cylindrical magnet with 1,5mm Radius,2mm thickness and Br 1,38 Tesla! I want to calculate the magnetic field in a distance s...
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Hand contact with capacitor negative (excess of electrons) terminal only.
Thank you for any help you are able to provide. I myself think that the electrons will flow to the human body and further drain the battery.
View ArticleFinal volume of a falling droplet
First of all, do falling droplets have a final volume like falling bodies have a final velocity - in air? If so, is there a way to determine such volume for a specific liquid and a specific height?...
View ArticleQuestion on characterization of elliptical polarization of EM wave.
I am using "Advanced Engineering Electromagnetics" 2nd edition by Balanis AND "Antenna Theory" 3rd edition also by Balanis. I found an inconsistency in how to characterize RHC (CW) and LHC ( CCW)...
View Articlewhat is flux...?? is it a scalar or a vector and difference bet flux and flux...
i have read the articles where the flux (either in case of electric flux or magnetic )is described as the no of lines passing through a surface area ( open in case of magnetic characterized by boundary...
View ArticleIs entropy the same as heat capacity?
A formula for entropy: dS=dQ/dT This is a formula that represents the rate of change of heat with respect to temperature. Q=mcdT This is another formula that states how the temperature changes as heat...
View ArticleRFID induction question and frequency
Well, passive RFID tags has to be inducted to work. When the induction reaches the tag, it powers itself and then the microcontroler sends a RF signal to the reader, with the product ID, rigth? What I...
View ArticleWhat sort of experiments can be doen with Graphite ??
I need experiments that can be done for the research of graphite.. GOt any ideas??
View ArticleHow does a transistor work as a switch and amplifier??
i know a transistor is a device that controls the flow of current but how does it act as a switch and an amplifier? i tried reading about it on so many places but i just cant seem to get it :confused:...
View ArticlePressure gradient in Jeans Lenght
All the demonstrations on Jeans instability start with: [itex]\rho g \ge \nabla P[/itex] Then they substitute [itex]\nabla P[/itex] with [itex]nkT/R[/itex]. But from ideal gas law: [itex]PV =...
View ArticleQuestions about conservation of momentum
What does having no external force on a closed system mean? For example if I have 2 objects colliding. One travels at a constant speed while the other travels with a constant acceleration. In this case...
View ArticleElectrical Appliance working on alternating current
The magnitude of current of alternating current varies with time The power developed by the electrical appliances, lets say an electric fan, also varies with time But why the fan can still operate...
View ArticleMagnetic flux density at different points in space
If I have a cylindrical permanent magnet with radius r, thickness t and strength B, how can I find the magnetic flux density (in tesla) for different points around the magnet?
View ArticleReactive power with electromagnetic sources in free space
Good morning, in circuit theory I know that reacting power arise from phasors and represents a power which can't be used, because not delivered to any load, but continuously flows back and forth...
View ArticleUsing Axial Ratio AR to predict R or L hand polarization.
I take issue with the "Advanced Engineering Electromagnetics" 2nd edition by Balanis again. In Page 156, it claimed for AR=-ve, it is Right Hand rotation, AR=+ve is Left Hand rotation. For plane wave...
View Articlewhat does +ve charge in conductor means, do they move...
Hello pf, Electrons are the charge carriers in metal conductor. while explaining about the fact the fact that electric field inside a conductor is zero, there is a depiction showing charge moves to...
View ArticleThe future methods of generating electricity?
Two main methods of generating electricity that I know off, and that are common: 1 ) Magnets & Coils 2 ) Solar cells. The only two methods! What do you all think are the possibile future methods?...
View ArticleAnother inconsistency from Balanis
I take issue with the "Advanced Engineering Electromagnetics" 2nd edition by Balanis again. In Page 155 to 157, the book is trying to explain that an ellipse is really a super position of a RHC and a...
View ArticleChanging mass
hi, I want to calculate how is acceleration changing if I have changing mass, but constant trust i.e. : T = m*a a = T / m (I know it has to be calculus). Then again I also wan't to be able to calculate...
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