Why does a magnetic field repel moving charges?
Why does a magnetic field produce a force on a moving charge? I would love if someone answered why and not how.
View ArticleProbability distribution using the Maxwell Boltzmann formula
According the the kinetic theory of gases, molecules moving along the x direction are given by Σx= (1/2) mv^2, where m = mass and vx is the velocity in the x direction The distribution of particles...
View ArticleCross Product
What is the cross product of a constant and a vector? I know that the cross product between two vectors is the area of the parallelogram those two vectors form. My intuition tells me that since a...
View ArticleSidebands in AM Transmission
Say you are transmitting AM radio signals. You input an audio signal of 1khz which is used to modulate a signal of 1 mhz. The heterodyning process outputs 4 different frequencies, the audio, carrier,...
View Articleaction = reaction and lorenz force
Newtons third law states that there is a counter force to every force. Unfortunately this doesn't seem to work for moving point charges. The Coulomb force cancels out but the B-Field of a moving point...
View ArticleExperimental proof that gravity ~ 1/R^2 ?
What is the experimental proof of Newton's law of universal gravitation? Specifically, how has it been established that the gravitational force between two masses varies inversely as square of the...
View ArticleHeat Exchanger Heat load calculation
i need to calculate heat load(Q) of a shell and tube heat exchanger.In this heat exchanger problem gives the following datas tube side(water) Avg flow rate=115 m3/hr@3.5 kg/cm2,density=990 kg/m3,Δt=5...
View ArticleDoes refraction lead to energy loss
Considering the vibrational damping of bubble wrap. My basic premise is that there are three main contributors to the damping effect: 1) Surface tension of the sheet structure and the bubbles...
View ArticleWhat is the meaning of nonholonomy in a system?
I keep coming across this term and I cannot understand what this means pertaining to a mechanical system. I'm working on spherical robots and their control and there is mention of nonholonomy in the...
View ArticleGeneralization of force.
What if we wouldn't define a force as F=dp/dt but instead as a function of [tex]F=F(p,q,\dot{p},\dot{q})[/tex] How will this change the equations of physics? Maybe there are cases where the force...
View ArticlePotential formulation of Electrodynamics with magnetic sources
Hello! I am trying to construct (if it is possible) a potential formulation of an electromagnetic theory which permits the presence of magnetic sources, using as a starting point the equations refered...
View ArticleGravity and magnetism...
My physics sucks but does gravity affect electical charges inside devices... Does it affect magnetism in coils... I thought it has an affect on anything regardless of how small it is.. right?
View ArticleOrigin of thermal radiation
I'm trying to understand the origin of thermal radiation. All things with a temperature emit electromagnetic radiation. Every discussion I've found starts with that as a premise and then goes on to...
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"Picture" of electro-magnetic vector potential in 1+1 dimension spacetime?
I'm trying to model the electro-magnetic vector potential, does the following come close for 1 + 1 dimension spacetime? See sketches below. Consider an elastic string, under tension, between two fixed...
View ArticleQuestion on gravitation law derivation
Hi, guys. I was wondering on Newton's Gravity Law derivation, and I found this page: http://www.relativitycalculator.com/...vity_Law.shtml Everything seems clear, but the first step is just killing me,...
View ArticleAny compilation of all classical physics concepts?
I understand many classical physics concepts but I feel like my understanding of the concepts are all scattered. I can't seem to make links between concepts. For example: I understand momentum, forces...
View ArticleRolling Resistance - proportional to speed?
Hi all you physics people.... we are building a high-speed robotic camera dolly here in LA for a film, and are trying to make sure we calculate our torque requirements correctly. The maximum torque...
View ArticleHeat current from the sun
I'm recently studying heat transfer processes. I saw that the heat current emited by a radiating body is given by: [tex]\frac{dQ}{dt}=H=A e \sigma T^4[/tex] I was wondering how to calculate the H from...
View ArticleLen'z law and a interesting video!
Please what this. This video will describe Len'z law from 0:00 till 1:25 You can skip till 1:25 and see the interesting part to understand the following question. * Is the aluminum cylinder pushing the...
View ArticleIs the magnetic field a mathematical abstraction?
Is the magnetic field purely a mathematical abstraction or is there actually something there? In other words, if a proton floating in deep space, is there actually something that shoots out in all...
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