Recent content by Yoni

Thanks. But, putting CME's aside, the induced currents (as explained above) are they of any concern for a functioning satellite?

A satellite in an orbit around Earth can be subjected to a changing magnetic field (due to eccentricity or angle of orbit or both) which can induce currents on its envelope. Are these currents negligible or are they of any concern to engineers? Also, as I understand it, the satellites high...

Of yet, I failed to find a satisfying answer to basic question. Does the body need to accelerate to produce induce currents on its envelope? If the body is moving inside a non-conducting medium, does this change anything? Thank you for your help.

Not helping. In wikipedia they only state a linear relationship between torque and current. My question is if this linear relationship remains at ever increasing currents (and before the wires burn)?

Hi, This is a general question: Do the motor constants KV and KT stay constant at high current? Thanks

I did mean "beat" and "skip", and I guess our pebbles here are flatter than yours... :) In any case, while it is trivial that the distance would be longer, My first guess was that the mean number of skips would not depend on gravity (if all other factors are similar). Regarding the height of a...

They found an underground lake on Mars last week! Given that the lake exists and is actually liquid (and has a surface), two obvious questions come to mind: 1. Will I be able to beet my earthly current record in bouncing a pebble there? 2. If I release a pebble from a given height here and...

Does a ferromagnetic body moving through an external constant magnetic field obtain an induced magnetic moment? If so, can this induced field be detected? Which equation describes it? Thanks!

I though all metals have this property... Anyway if I take these types of materials, where the flow of electrons is at the skin, and double the width of the wire, will I get half the resistance or a quarter of the resistance? That is, is resistance linearly dependant on the cross section or on...

The electrons flow on the outer surface of the resistor, why then does the resistance of a resistor depend on it's cross sectional area and not on it's perimeter?

Will an Ion generator work in space?? And how does it normalyl work? Does it push upon the ions in the air, or does it actually throw electrons, and this spins the rotor? This is an Ion generator:

Note, a patent for 5-sided dice exists. However, it is not a pyramid, and only empirical evidence vouch for it's fairness.

I want to construct 5 sided dice in the shape of a square-based pyramid. When rolled, I want the die to have equal probability to fall on all sides. That is, I want the odds that the die would fall base down to be 0.2. I insist on a pyramid shaped die (not tetrahedron). Other solutions are not...

It is convenient to assign high randomness high information. Random patterns, however, supposedly present no meaning. So how can information be meaningless? What is "meaning" and is it relative to "the observer"?

A most common tool in engineering is "Dimensional Analysis": http://en.wikipedia.org/wiki/Dimensional_analysis This tool can provide you with the dependence and scale. For example, using Dimensional analysis one can easily derive how the Period of a pendulum, T, is dependent on string length...