Maxwell's Relations of Thermodynamic Functions
The following are Maxwell's Relations right? [itex]\left(\frac{\partial s}{\partial v}\right)_{T}[/itex] = [itex]\left(\frac{\partial p}{\partial T}\right)_{v}[/itex] [itex]\left(\frac{\partial...
View ArticleFalling object in gravitation field
I am trying to study the motion of a falling body in the earthÂ’s gravitational field however not assuming a constant acceleration. I want to work out the distance travelled in a given time. We know...
View ArticlePower and forces
Hello forum. I am finding it hard to wrap my mind around the concept of power when considering forces. We can derive [itex]\text{P} = \text{F} \cdot v[/itex] but what now does the symbol F really...
View ArticleIntegral from an electric field calculation
Hi all, Any ideas how to solve this integral? $$ \int_{0}^{\pi} \frac{(z-R\cos{\theta})\sin{\theta}d\theta}{R^2+z^2-2zr\cos{\theta}}$$ It crops up in a calculation of the electric field for a spherical...
View ArticleLarge Scale Generators
So, I was wondering if a conducting loop was placed in orbit around the Earth would it be able to generate a current?
View ArticleMermin-Wagner theorem and 2D magnetism
I am a little confused about the Mermin-Wagner theorem, and the assumptions it makes, and I would like to better understand the 'exceptions' to the rule that occur in practical (non-ideal) scenarios....
View ArticleHow current relates to capacitance
Hi all, I have a simple circuit with a battery, resistor, and finally, the capacitor. Am I correct in saying that adding additional resistors will increase the charging time, because adding resistors...
View ArticleRecursive model for body in fluid
Good evening, I've been trying to wrap my head around this problem for some time and I just can't seem to get it straight. What I am trying to achieve: I want to program a recursive model that...
View ArticleConverting from Static to Dynamic Understanding the Darcy Weisbach
Trying to get my head around something with the Darcy Weisbach. It is used to calculate the head loss of a moving fluid within a pipe. So for example if we take a pipe with an entry point 6m above a...
View ArticleThe philosophy of squaring > Why no f=ma^2
Please watch 05:00 to 08:00 http://www.youtube.com/watch?v=jbmFcGhTnS0 Force = Mass x Acceleration So for example, F=10 grams x 3 acceleration What that really means is, F=10 grams x 1 acceleration...
View ArticleCalculation of Electric Susceptibility In Solids.
I'm curious what models there are for calculating the Electric Susceptibility in crystalline solids and any books that describe maxwell equations in solids well. I'm interested in how to predict index...
View ArticleMichelson Interferometer
Hello Forum I have constructing a Michelson Interferometer using sodium light. For viewing the fringes, I have used spectrometer telescope with objective lens of 178mm focal length, 35mm dia and...
View ArticleGravitational law and point mass
Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and...
View ArticleCondition of the work energy theorem
Hi, After reading several resources about work and energy, I am confused about the conditions that should be satisfied in order to be able to apply work energy theorem. It seems that textbooks have...
View ArticleElectromagnetics Minus the Fields
Basically my question is this: could we, in principle, formulate all of classical electromagnetic theory purely in terms of the force one charge exerts on another, or do we need to include the...
View Articleelectric field in a hollow charged sphere
I am wondering about why the electric field in a hollow sphere with charges on its surface would be zero. I have thought about the gaussian law argument for it. It only guarantees that the net number...
View ArticleBicycles and Microwaves
My friends and I have thought about this for a few years now and still can't come to a conclusion. If an electronic device was placed on a push bike and could be powered by it (for arguments sake we...
View Articlepulley system with one mass and apparently independent forces?
So at my gym, there's a cable machine that works like this: You pull on one cable and you lift x mass using y force. You pull the other and find the same thing. If, however, you pull on both, you're...
View ArticleSimple doubt in induced charge
When a positive point charge q is brought close to a neutral conducting spherical shell then negative charges will be induced on the part of the shell closer to q and equal positive charges will appear...
View ArticleAir to Water Heat Exchanger using Pex Tubing
I have a project to build a well insulated cylindrical vessel approx 220 cm in diameter and 125 cm in depth. Like a drum within a drum, there will another circular level that will create a channel of...
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