is there anything known as a Heat conductor
All the metals are generally good conductors of heat. But is there a conductor for heat which drives heat without deviating or diverging through a fixed path as copper wires conduct electricity.
View ArticleHomopolar Generator
The basic set up for a homopolar generator has a stationary magnet and a rotating conducting plate with contacts at the center and rim of the plate. I would think that even if magnet were spinning...
View ArticleMagnetic force paradox Hall Effect
Hello, I was taught that moving charges in an external magnetic field experience force. Okay. I wondered that if the observer was moving with the same velocity as the charge is what would happen? I...
View ArticleField induced in a conductor
If an arbitrary shaped conductor is moving through a steady-state magnetic field, [itex]\mathbf{B}(\mathbf{r})[/itex], is it true that the field induced in the conductor will be proportional to...
View Articlewhy do charge carriers reside on the shell of a conductor?
can someone please provide me with a proof or even just an intuitive explanation
View ArticleWhat gives particles charge?
Why do oppositely charged particles attract? I know this question was asked on PF a while ago, but the answers given do not seem too convincing. I understand that, by Coulomb's Law, there are...
View ArticleArgument on centrifugal force...
My grade 11 textbook never mentioned about inertial frame, non- inertial frame, rotating frame of reference and so son.The derivation of centripetal acceleration was very intuitive.This derivation was...
View Articlegrav. acc. of object trade-off as vol. increases?
Dear all, I am thinking of a simple situation: A cube is falling under the force of gravity. It is not in a vacuum, and so air resistance has an influence. However, to simplify, the air is still and...
View ArticleBuilding a laser?
Hi, I wanted to ask some questions about lasers. I'm pretty bored with school and want to work on a project for a while. I though of maybe trying to build a laser, mostly because it's really awesome,...
View ArticleForce in field? Why isn't it constant?
Distance is a key variable with fields, however, why is it, in any field(Gravitational,Electric,Magnetic) as "d" increase, F decrease substantially? Why can't the force x, be constant all around the...
View ArticleHeat transfer equation and internal energy
The heat transfer equation is Rate = kA(T1 - T2)/d where k is the heat transfer coefficient of the material. But I'm feeling that the other material transferring the heat should be important too. I...
View ArticleDoes atmospheric pressure affect the saturated vapor pressure ?
When the Clausius-Clapeyron equation for saturation vapor pressure over liquid water is derived via the Carnot cycle, it is usually assumed that there is only gaseous water above the liquid. The other...
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Canonical Transformations
Background For which of the invertible transformations [itex](\mathbf{q}, \mathbf{p}) \leftrightarrow(\mathbf{Q}, \mathbf{P})[/itex] [itex]\mathbf{Q}(\mathbf {q}, \mathbf {p}, t)[/itex]...
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Help with equations of motion
Hi, I am having a little bit of conceptual trouble with this problem and would appreciate your help. The problem setup is given in the figure. Let's say we have a slender uniform rigid arm(mass m,...
View Articlecalculate the flow velocity
This might be simple but I can't remember how to do it. problem: we have 2 tanks. One filled with atmospheric air at 1 bar and the other is vacuum. The two tanks are connected by a rigid pipe which has...
View Articlethermodynamics and polytropic ideal gas (very simple theory question)
hey all! i have a question i was hoping some of you could unravel. specifically, in thermodynamics i understand in a quasi-static situation we can right work as: [tex]W=\int PdV[/tex] where...
View ArticleA Tricky Problem Involving Entropy
So we learn in basic thermo that for any system, the derivative of entropy with respect to volume is pressure over temperature: ∂S/∂V＝P/T. Suppose we have a box with two partitions, and a moveable wall...
View ArticleDirection of friciton in bicycyle..
I found that direction of friction on ball rolling to east is towards east. And I Know direction of friction in moving bicycle when it is not paddled is backward on both rear and front wheels. Aren't...
View ArticleBlocks on a rotating disc connected by a spring
To understand centripetal force due to friction better, I came up with this problem. I'm not entirely sure of my solution, though, so I'd be glad if someone else took it up too and suggested a way to...
View ArticleLaser Sheet Optics
Hello, I've been helping a graduate student out with his project which is planar laser-induced fluorescence. Part of the procedure involves generating a laser sheet with which to illuminate over the...
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