Maximum magnetic force produced by ferrous material
Lets say you have a block of iron with a mass "m" exposed to an infinitely strong magnetic field "B." If there was a strong wooden interface preventing this iron block from moving towards the magnetic...
View ArticleRelation between acceleration and velocity
Hi all, so my question is can i carryout normal algebraic operations on derivatives, for example: v=ds/dt and a=dv/dt then eliminating dt a=(dv/ds) *v then, a *ds= v*dv is that how you derive the...
View ArticleConductors in large electric fields
You place a conductor in an electric field. The charges inside the conductor will relocate, to form an opposing electric field which cancels the outside field, making the field inside the conductor...
View ArticleOn carbon, methane and electromagnetic radiation
iTunes University layman looking for answers and willing to do the work – just need some direction. I now understand electromagnetic waves can be created when molecules vibrate – which they all do. I...
View ArticleEvacuated Canister and Flow Rate
Hello everyone, I am currently in a mechanical engineering program, and I am on my first co-op work term. I have been assigned to make modifications to a PVC collection device involving flow rates, but...
View ArticleResistance and Electric Potential
This is probably a simple concept but I'm struggling a little bit understanding it. When power is dissipated through a resistor, how is potential actually lost? I understand energy is converted into...
View ArticleCalculating Illuminance of a panel light
Hello, I would like to build a panel light with four flourescent tubes. The tubes have a diameter of 26 mm and are 1200 mm long. They have a distance of 42 mm one to another. The tubes are mounted on a...
View ArticleNormal and centrifugal force for arbitrary curves
Hi, i have a curve g:[0,t]->IR² with g(t)=(x(t),y(t)) in a homogenous gravitational field and i want to look at a ball rolling down this curve. therefore i want to derive some equations in order to...
View ArticleTrying to understand reduced mass
I understand that the reduced mass is used to simplify a two-body problem into a one body problem, so that instead of calculating two masses rotating around a common center as in the earth and moon,...
View ArticleBee in a Revolving Restaurant!
This causes endless arguments around our dinner table: If there were a fly or a bee hovering in a theoretical revolving restaurant, would it move with the revolution of the room or stay stationary...
View ArticleWhy is rigid body rotational energy not exactly applicable to fluids?
I was thinking about the rotational kinetic energy of fluids the other day and I realized that I have a huge gap in my knowledge of physics. Why doesn't rigid body rotational kinetic energy (KE =...
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Spinning Egg Problem
I'm trying to understand the spinning egg phenomenon. That is, why does a hardboiled egg (or any solid ellipsoid) "stand on end" when spun at high velocities. Upon searching the web I found one site...
View Articlewhere to find sample fluid stirring data?
I want to find some force data for fluid stirring. originally I intended to record the data using my force sensor, but it doesn't have the resolution to read stirring force for newtonian fluid. unless...
View ArticleConservation of Energy: Comparison between momentum & magnetic fields
Momentum and magnetic fields are both vector quantities. If two bodies with the precise mass and speed collide head on (θ = 0), then momentum is conserved (they come to a complete stop) and energy is...
View ArticleCalculating EM field using only cross-section of past light cone?
If you want to know the value of the electromagnetic field at some point in space P at time t1, I assume that since EM is a relativistic theory, it should be possible to derive it using only the value...
View ArticleNegative Voltage
Ok, I am starting to understand what voltage is. But i'm sort of confused when it comes to negative voltage. I know that voltage is defined as potential energy per unit charge. I understand it as...
View ArticleMechanism of Cooling
Hi all, I am not clear with the concept of "Cooling" a body.I know that the temperature of a body is the average kinetic energy of the molecules or atoms in the body.When heat energy is supplied,the...
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The mechanics of ice skating
Hello, I'm trying to bone up on my conservation of angular momentum skills as well as my ice skating skills so I can be like my hero, Michio Kaku. Unfortunately my ice skating skills are better than my...
View Articledifference btw induced and static electric field.
∇x E≠0 for an induced electric field whereas for field produced by static charges we have ∇x E=0. This is a very huge difference in the property of a vector field,then why do we call both of them...
View ArticleMain differences between single-well and double-well chaotic attractor
Hello all. I'm trying to understand why a Duffing system with a double potential well behaves chaotically for larger set of parameter values than one with a single potential well. What are the main...
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