Detection of Monopoles
Hi, I just submitted some homework that had a question that I'd really like to know the answer to now (rather than waiting on getting the hw back). The question asked to plot the current induced in a...
View Articlerelative velocity
I am really confused about relative velocity when one frame is rotating. Is it possible to have velocity/acceleration of A relative to B and velocity/acceleration of B relative to A not having same...
View ArticleVoltage Divider Question
Is it possible to make a voltage divider split a DC power input between a resistor and capacitor? If so, does anyone have a good way to calculate vout as a function of time? Thanks :D
View ArticleDefining a thermodynamic system completely
So I read somewhere that if we know u(s,v) i.e. internal energy as a function of entropy and specific volume, we can find all other thermodynamics quantities on earth, like temperature, pressure,...
View ArticleMinimum work and work-energy theorem
Hi guys, I've got a doubt concerning to the minimum mechanical work and the work-energy theorem. Consider the following Tippens' problem (8.4): A 5-kg hammer is lifted to a height of 3 m. What is the...
View ArticleWhy does dθ = ds/r
I know how this formula is made, but surely Δs becomes highly inaccurate for large values of Δθ and r? In fact when Δθ is ∏ surely Δθ ≠ Δs/r. Elucidation would very appreciated.
View ArticleVortices, Resonators, and Foam sleeving
Hi, I recently became acquainted with foam sleeving as a material for forming a resonant cavity via this link: http://www.phon.ucl.ac.uk/home/mark/vowels/ . I'd actually read about it before used in an...
View ArticleI need some tips about a Gauss measurement
What can a gaussmeter tell me about a metal? I am just experimenting with various metal disc samples by setting them on the Hall probe of a gaussmeter. I have the meter zeroed out, then I pace the...
View ArticlePneumatic Cylinder Discharge Equations
Hi all, First post here and I hope that somebody can help. I'm using Simulink/Simscape to model discharge of gas from a constant volume, pneumatic, pressurised cylinder. No heat exchange with...
View ArticleTensions of cable over a pulley
In the figure attached, we have one section which has three bars all pin-connected together and pin fixed on the ground. We have two pulleys connected with the section by string. And we have one string...
View Articleis a surface plasmon an EM wave?
From my understanding, surface plasmons (SPs) are oscillations of electrons caused by incident EM waves. A photon from the EM wave can couple with a plasmon to create a surface plasmon polariton (SPP)....
View ArticleQuestion about inertia and acceleration
This question is just about a thought I was having. If a 1 kg object which is at rest is made to accelerate with a force of 20 newtons and then three seconds later have an opposing force of 20 N...
View Articlechemical potential
in class, we just learned that the chemical potential was μ=∂G/∂N i'm looking in my book and it says that μ=-T(∂S/∂N) this looks alot like the partial of heat energy with respect to N. is my...
View Articleosmotic pressure
osmotic pressure is the pressure difference between two solutions of different solute concentrations separated by a semi-permeable membrane. my book says: "the osmotic presssure is exactly the same as...
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Rotational and Translational Forces
I am having a hard time proving this to myself: Given some object with a known inertial moment and center of mass, with r = distance from COM, do forces of equal magnitude along some line L...
View Articleis the Maxwell stress tensor a true stress?
Should it be added to the Cauchy stress to calculate a "total stress", or it doesn't have such a physical interpretation as a surface force(EM field force is usually considered more of a "body force")?...
View ArticleWing Span Efficiency Factor
Hello Everybody, Span efficiency factor appears in the lifting-line theory of Prandtl describing Lift and vortex drag of a finite wing. According to this theory, the most efficient wing is an...
View ArticleIs the classical formula for kinetic energy wrong?
Recently I have been troubled by several things which have been stated in my school physics classes, mainly concerning the classical kinetic energy formula and other formulae derived from it (as well...
View ArticleNeed some help trying to understand the Michelson interferometer
Refer to the second diagram on this website http://electron6.phys.utk.edu/optics...ferometers.htm Using monochromatic light at first, you produce an interference pattern using the Michelson...
View ArticleSilly question: balloon floating above vs with the Earth
Hi everyone I had this very silly question pop up that unfortunately I cannot find an answer to myself. If an object - say, a hot-air balloon - flies at a low altitude above the Earth, it will of...
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