Explanation Definition and 982 Threads

Hi, I recenlty had a friend whose interested in QM email me an article: http://www.space.com/searchforlife/quantum_astronomy_041111.html , asking for more explanation. This is the explanation I sent in a sleep-deprived state of mind (in fact, I'm still in said mind state as I post this now :) )...

Hi everybody, I have a kinda theory to explain but I need a little help to find out the explanation of it. It is, suppose your first guess using Newton's method to find a root is lucky and you guess the exact root of f(x). (Not an approximation,but exact) What happens to your second...

I have a unclear problem about time travel: As you all know,when a spaceship move pass Earth with the speed nearly c, the observer will regconise that the watch on the spaceship is moving slower than his own clock. However, to the astronaunt who is on the spaceship, what he saw is the Earth is...

ok, i have a problem and its answer, but I am not sure how to get the answer: Police lieutenants, examining the scene of an accident involving two cars, measure the skid marks of one of the cars, which nearly came to a stop before colliding, to be 81 m long. The coefficient of kinetic friction...

Shannon's measure of information is the well known formula (in the discrete case): H(S) = {-}\sum_{i=1}^N P(s_i) \log_{2}P(s_i) Of course this can be written as: H(S) = \sum_{i=1}^N \log_{2}P(s_i)^{-P(s_i)} It appears to me that the multiple occurence of the same quantity (the probability of...

Can anyone give me a fairly brief explanation of how liquid color displays work, and why they display color, instead of just a lightened color for charged areas, and black for uncharged areas. Lastly, I've no idea why these devices display color, what the liquid is composed of, what physical...

I'm having difficulties understanding the concept of power and how you generate it in a circuit. Mainly I'm uncertain about how electrical energy can be used to produce power and what are the conditions for producing it (are resistors required?) Would someone be so kinda as to give me an anaolgy...

One of my homework problems for GR says: "Explain why a uniform external gravitiational field cannot raise tides on the Earth." My explanation is: Because of the large size of the Earth compared to the distance the Earth is from the moon, the nonuniformity of the moon's gravitational...

What does the term "magnetic breakaway force" mean?

Would anyone be willing to explain Stokes' Theorem to me? I have managed to grasp the concepts of grad, div, curl, and what the text calls "green's theorem", but I cannot seem to grasp the geometric meaning of "stokes theorem." I've been trying to put the theorem together based on the...

"Odd Black Hole Defies Explanation": space.com http://space.com/scienceastronomy/blackhole_medium_040608.html

Day-dreaming the other day, I postulated a possible explanation for the controversial Big Bang Theory. Because an object attains infinite mass when it reaches light speed, is it possible that a pre-big bang species reached light speed (or near) and the affected object achieved infinite mass (or...

Is gravity so weak because every force mediating boson starts out as a graviton, which then loses energy and becomes gluons,photons W and Z particles. This would mean that the graviton carries colour charge and so dark energy must emit gravitons with colour charge and therefore dark energy...

Hi all, I'm stuck on this charge equation: Q=Q * e (-t/RC) = 780 * e (-9.8/3.3) I've got 40.03 but the answer is 15200 if I took away the negative sign from the equation then I'll be able to get 15200. but that should not be the way isn't it? can somebody advise me how should I go...

http://hessdalen.hiof.no/pictures/

Does anyone have an intuitive explanation why the gravitational force of a uniform sphere on a distant point is the same as if all the sphere's mass were concentrated at the center? The usual integration over spherical shells goes through o.k. but the result is so simple it seems to me that...

Does anyone have an intuitive explanation why the gravitational force of a sphere on a distant point is the same as if all the sphere's mass were concentrated at the center? The usual integration over spherical shells goes through o.k. but the result is so simple it seems to me that maybe we...

Could I have an explanation on the term calculus maths? The exact meaning of this is a bit vague to me and in Norway we do not use this name for this type of math, whatever it is. Thank yous

This was a Brain teaser question, and i have no idea whatsoever why this is the correct answer. As i said in the thread title an uneducated mind

Well, we all know that the farther you move the point of force application from the point of rotation, the greater the torque. But why? I know the equations, but I am lacking a physical explanation of why this is. The best explanation that I've gotten is something along the lines of a...

I've just gotten around to reading "The Elegant Universe" and it has an explanation of why it is impossible to travel faster then light through the use of Einstein's equation E=mc^2 (pg 52). Greene says that the faster an object moves the more energy it has, and because of Einstein's equation...

Hello all. I live in Singapore, located somewhere at the equator. Just a few nights ago i spotted something rather strange. I looked up into the sky and to my astonishment, there was this region of clouds that was illuminated orange in colour every once in a while. It's like glowing at a regular...

...the electron. I don't know what it is and I've read dozens of electronics/chemistry books trying to figure it out. I don't want to hear that it's a wave, I don't want to hear that it's a particle and I certainly don't want to hear about the duality of it being a wave-particle. I don't care...

As it's simply explained, the many worlds theory states that everything has an infinite amount of possible outcomes and that a new reality is created in which one of each outcome occurs. This process of new reality creation keeps occurring infinately, creating more and more infinite amounts of...

Heisenberg's Uncertainty Principle/Schrodinger's Cat Couples engaged in a romantic relationship usually have large amounts of physical contact with one another. However, when someone seems near, physically, to them, they begin acting normally again, even if blushing a bit. We therefore see that...

what triggers laughter? i am speaking of the kind that brings you to tears, makes your belly shake, makes you smile real big...what chemicals are responsible for true laughter? or is it a socially learned response?

http://www.cnn.com/2003/TECH/science/09/08/ghosts.sounds.reut/index.html

First, let me say that I have degrees or anything. I'm just out of hig school and took regular math the whole time I was there. I am not a mathematician or a numerologist. But, I do have a theory.:wink: Could we say that 6/3 is the same as saying "six divided into three equal parts"? If...

Can someone please define for me what is meant by string theory and what the significance of it is and why, according to stephen hawkins, it would take 32 dimension to permit the existence of such a phenomenon.

yes ins the so called prime-number counting function that is Sum over all the prime numbers less than a given number x of f(x)=1 in fact my calculation is easy got from the formula: S(p)Exp(-sp)=L(Pi(x)) where L is the laplace transform and s(p) means the sum over all primes of the...

Does anybody know the neurochemical explanation behind insomnia?

I am nearly certain that it has been suggested that three of the four now thought to be fundamental causes of motion have been unified. Excluding gravity, these are : the weak force, the strong force and electromagnetism. Can someone please explain to me what indicates or how it was shown that...