Long time no post...
I am very much disturbed after my research of measurement errors and corresponding norms, because I find so few results. There are mainly two ways to specify errors of measurement instruments. Standard deviation with its siblings and maximum error.
I am a great fan of...
Anything that was made public cannot be patented any more. It's mostly ok to discuss it with your friends, but as soon as you get a large anonymous audience you cannot patent. So you would have to start the patent process before you publicise your idea.
It happens all the time. Maybe the phenomenon is not new, but the fact that someone can explain it is. Sometimes you can win an ignobel price with it :) http://physics.aps.org/synopsis-for/10.1103/PhysRevE.85.046117 Remember that most phenomena in real life are classical.
There are a lot of unanswered questions in classical mechanics. Unfortunately I am no expert and I just have a vague feeling about the type of topics where there is definitely work to do.
Arbitrary rotating bodies with forces. There seems to be only a horrendously complicated solution for the...
Ok.
Not OK. What is mass energy supposed to be?
The potential energy of the masses with respect to each other plus the kinetic energy of the masses in the centre of mass inertial frame plus a possible kinetic energy due to the velocity of the centre of mass plus an arbitrary constant (if we...
Whenever a particle is confined it doesn't have a well defined momentum. Momentum in a certain understanding doesn't make sense for a confined particle. The Schrödinger equation conserves momentum therefore it is conserved, but if you start with a particle which is confined the equation will...
In a way it is really counter intuitive that a ball doesn't make more noise on a piece of cloth than on a piece of metal. After all the friction on the cloth is much higher so there is more energy lost from the the rolling ball. The answer to this problem lies in the fact that the vibrations in...
The point is that you need two different materials, so that the voltages are not balanced. Otherwise there is no measurable current or voltage. You cannot operate a solenoid valve on a thermocouple made only of copper.
You need two conductors because the effect is very hard to measure otherwise. Let's say you have a copper bar with a thermal voltage across it. It is easier to understand if we use an Ampere meter to measure this voltage. If you connect the Ampere meter to the piece of copper using copper wire...
The index of refraction depends on the square root of the dielectric constant, which describes how a material polarizes when there are electric fields present. Polarization is an effect where electrons and nuclei are pulled apart. If the intensity of the electric field becomes very high there...
A few more notes. I don't know exact numbers, but people from the beginning of bitcoin are surely hoarding a vast amount of bitcoins. They are like the central bank. If they decide to cash out, the currency collapses (maybe just temporarily). I don't like the idea of a random 19 year old...
I am not entirely sure here, but I think with ac equipment and coils the problem is saturating the core. A fairly low dc current seems to be enough for the core to saturate. Usually the current drawn is limited mostly by the inductance of some coil with a core. If you get into a region where the...
Well, in a way the first law follows from the second law. In reality Newtons laws don't stand on their own. You have already made a lot of assumptions about the vector addition of forces, the mathematical structure of the space, the properties of rigid bodies. So if you put more work into the...