Reverse Quaternion Kienmatics equations
Hi all!, first post! I'm programming an attitude estimation and control algorithm for a satellite. So I need a reference "trayectory" for my control system to try to follow. The generation of that...
View ArticleClik here to view.
"Spring connected to a block" problem
A block has an initial velocity of V and is connected to a damper and a spring like this: The problem is to figure how far the spring vill maximally be compressed. The damping is linearily proportional...
View ArticleGravity vs. infinitely rigid bar
Hey folks. I was reading this odd explanation for why the bottom of a hanging Slinky appears to defy gravity when the top is released. As the comments note, there is a simpler explanation involving how...
View ArticleTemperature of ideal gas?
When 2 ideal gas mix, there will be no temperature change. Is that because there will not be any chemical reaction occur, so no temperature change? thank
View ArticleClapeyron's Theorem Revisited
To help make my question clearer, I will be referencing equations from the following paper. http://www.engr.colostate.edu/~thomp...ics/energy.pdf Before I am informed, I have read all articles on this...
View ArticleStatic Equilibrium for an object in 3-dimension
I have studied a few online sources about static equilibrium in a mechanical system. My overall understanding is that for an object to be in static equilibrium, two following conditions have to be...
View Articlevolumes in pipes
Hi How much volume would be in the following round pipes 1. 1000mm x 50mm 2. 1000mm x 76mm 3. 1000mm x 101mm 1 liquid has a S.G = 1 1 liquid has a S.G = 1.30 Any help appreciated IJC7
View ArticleElectromagnetism - Poynting vector
Hello! I' currently reading EM and am in need of a verification that I understood it correctly before proceeding. Just to see if I got this right: The energy flowing out of a point, p, is described by...
View ArticleFree Energy and Potential Energy
I think that I may be confused about what free energy is. I want to find the maximum PE of a system. So this is simply the Hamiltonian when the KE term is zero. So what is the free energy? I wrote in...
View ArticleConservation of momentum/kinetic energy in inelastic collisions.
I'm finding it difficult to understand how momentum is conserved in an inelastic collision, but kinetic energy isn't. I understand some energy leaves the system in the form of sound and heat. If we...
View ArticleClik here to view.
Smoothing of rectified voltage with capacitor
Dear forum I have s issue concerning rectification of a sinusoidal voltage with a diode. It is a experiment i am doing. The case is a 1N4001 diode in series with a lamp and a capacitor in parallel to...
View ArticleWhat is Spectral Yield
I was reading a paper about channeling radiation and it had a graph of radiation with photon energy on the x- axis and spectral yield on the y-axis. I am unfamiliar with "spectral yield". I looked in...
View ArticleClik here to view.
Friction and Tension along a Curved Path
I just want to make sure my thinking and free body is correct before I go further in a project I am working on; for some strange reason (probably the curved path) I am doubting myself. I will try and...
View ArticlePerpetual Motion
Elementary particles spin. So does the Earth. Spin does work. The spin of electrons and other elementary partlces never stops, or slows down. Why isn't the spin of particles considered to be perpetual...
View ArticleWork done as a function of time
Hey guys, can the work done on a body be described as the function of time during which a force acts upon it?
View ArticleDerivation of the thermodynamic potentials using Legendre transformations
Hello guys, I'm studying Thermodynamics and I don't totally see how you introduce the potencials using Legendre transformations. I have seen a non formal explanation showing how you can interpret them,...
View ArticleClik here to view.
RLC circuit driven by a 'Real' toroid
I'm currently wanting to model an RLC circuit that is driven by a toroid transformer with a driving current, I(t). See image below. In physics class, I've done similar problems with 'ideal' toroids and...
View ArticlePower in beam of light given amplitude
I would like to calculate the power of a beam of light once I know the electric field amplitude. For example if I know the amplitude along a line from -1 meter to +1 meter every 0.5 m is [1, 2, 2.5, 2,...
View Article