Work done by gas in adiabatic process
In an adiabatic process PVγ=constant Now I thought the work done by an ideal gas in an adiabatic process was given by the equation here: http://hyperphysics.phy-astr.gsu.edu...rmo/adiab.html But while...
View Articlehow to solve magnetic field using differential form?
is there any general way? i mean i know how to do it in integra form but the course im taking right now requires me to do it in differential method
View ArticleWhy capacitor works?
After studying more complicated electronics, I find myself asking this question - 'Why capacitor works?' Why does charge get accumulated on the plates? Isn't that a higher energy state than battery?
View Articleelectron beam
hello every body Can anyone help me for searching about this topic, How to generate electron beam? I want few information about electron source, in a simple explanation, and namely, not complete...
View ArticleOptics issue with focusing beam
Hello all, I've got an optics problem that I'm having some difficulty with, where I want to send a beam through a converging lens to obtain a certain image size. My incident profile is that of a ring...
View ArticleHow to measure speed without knowing the distance?
Hello, Is there a cheap device or someone that I can easily build that will let me know the speed of a moving object? Its for one of my son's project... Thank you in advance.
View Articlenatural logarithms in stat mech
Greetings, This question makes reference to the stat mech book, “Fundamentals of Statistical and Thermal Physics”, by Reif, so people who have that book will probably understand where I am coming from...
View ArticleConcentration of evanescent/surface waves
Hello, At the interface between dielectrics and vacuum, there is always evanescent waves present (you can consider them as being generated due to total internal reflection of electromagnetic waves...
View ArticleQuestion relating to direction of magnetic force on moving charge
Hi I have always been very curious if anybody knows why the magnetic force on a moving charged particle in a magnetic field is always perpendicular to the plane containing the magnetic field's vector...
View ArticleNeed help figuring out velocity of a venting gas
I have a compressible gas (nitrogen) venting from a pipe. What I am trying to figure out is how fast the gas is exiting the pipe. I know the volumetric flow rate and the area of the pipe, but I cannot...
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force on a massless inextensible string passing around a pulley
Attachment 61042 I just can't get why for a massless inextensible string passing around a frictionless pulley we easily take T1=T2 (in fig.).My profs. never did explain this & jumped on further...
View ArticleGravity in the x, y and z directions
I am working in classical mechanics. A planet is orbiting a star. The planet has a given velocity and a position vector from the star. How do I find the magnitude of the gravity in the x, y and z...
View ArticleQuaternion Derivative
Quaternions are new to me, so I constructed a simple model to help grasp the concept. I have a very simple dynamic model that used Euler's equations for the rigid body dynamics. The model only...
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Nip Roller Torque
I'm wondering if someone could help me. I'm curious what the torque in each driven roller would be in the following picture. Say for example I want the input tension(T1) to be 10 lbs and the output...
View ArticlePotential difference across an inductor
I have some confusion about how emf across an inductor is generated: The potential difference across an inductor is an induced emf produced by the changing magnetic flux through the coils of the...
View ArticleInternal energy of dry ice
I am doing a simple thermodynamic analysis. Couldn't get thermodynamic values (such as internal energy, exergy, and so on) from common data base of CO2. I looked it up in REFPROP(By NIST) and EES. None...
View ArticleDoubt in uniform circular motion
why are we considering speed is constant to find velocity a particle in uniform circular motion, is it possible for a particle in a circular motion to have constant velocity?
View ArticlePhysics of nip rollers
So I posted a question regarding nip and torque and I'm starting to realize that I need to know more about the mechanics of a nip roller to fully understand them. Here a pic I already posted just to...
View ArticlePrinciple of least action used to predict particle movement?
I am having a tough time understanding the principle of least action and I would really appreciate it if someone would clear it up for me. And from what I understand from it, it can be used to predict...
View ArticlePlane Wave propogation dependent on space and timez
Hi, I've been looking at some animations of plane waves, and I really cannot see why a plane wave's electric field is dependent on both t and z. Isn't z a function of t? I would've thought that z could...
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