Heat is the average of the randomized motion
Post Reply
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
10-09-2012, 10:55 AM
RE: Heat is the average of the randomized motion
(10-09-2012 10:34 AM)Bishadi Wrote:  
(10-09-2012 10:06 AM)Phaedrus Wrote:  And the woo woo starts again.

Neils Bohr was a brilliant Danish physicist who came to dominate the world of atomic and nuclear physics during the first half of the twentieth century. Bohr suggested that the planetary model could be saved if one new assumption were made: certain "special states of motion" of the electron, corresponding to different orbital radii, would not result in radiation, and could therefore persist indefinitely without the electron falling into the nucleus. Specifically, Bohr postulated that the angular momentum of the electron, mvr (the mass and angular velocity of the electron and in an orbit of radius r) is restricted to values that are integral multiples of h/2π. The radius of one of these allowed Bohr orbits is given by



in which h is Planck's constant, m is the mass of the electron, v is the orbital velocity, and n can have only the integer values 1, 2, 3, etc. The most revolutionary aspect of this assumption was its use of the variable integer n; this was the first application of the concept of the quantum number to matter. The larger the value of n, the larger the radius of the electron orbit, and the greater the potential energy of the electron.



As the electron moves to orbits of increasing radius, it does so in opposition to the restoring force due to the positive nucleus, and its potential energy is thereby raised. This is entirely analogous to the increase in potential energy that occurs when any mechanical system moves against a restoring force— as, for example, when a rubber band is stretched or a weight is lifted.

Thus what Bohr was saying, in effect, is that the atom can exist only in certain discrete energy states: the energy of the atom is quantized. Bohr noted that this quantization nicely explained the observed emission spectrum of the hydrogen atom. The electron is normally in its smallest allowed orbit, corresponding to n = 1; upon excitation in an electrical discharge or by ultraviolet light, the atom absorbs energy and the electron gets promoted to higher quantum levels. These higher excited states of the atom are unstable, so after a very short time (around 10—9 sec) the electron falls into lower orbits and finally into the innermost one, which corresponds to the atom's ground state. The energy lost on each jump is given off as a photon, and the frequency of this light provides a direct experimental measurement of the difference in the energies of the two states, according to the Planck-Einstein relationship e = hν



if you comprehend that, he said the same thing!

This is a summary? there's about 4 different things spread over three paragraphs. does not equal summary

When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

You cannot successfully determine beforehand which side of the bread to butter.
Find all posts by this user
Like Post Quote this message in a reply
10-09-2012, 12:26 PM (This post was last modified: 10-09-2012 12:29 PM by Vosur.)
RE: Heat is the average of the randomized motion
Bishadi, I would be glad to give any of the threads you made so far a second thought if it wasn't for the fact that you can't articulate your thoughts at all. Take this as well-meant advice when I tell you that you should consider stepping back from the forum for a while, learn how to speak proper English by reading a book or taking free lessons online and then come back so that we have a chance of understanding what you've been trying to say the whole time. You are either too dense or too ignorant to realize that you won't succeed with your current approach anytime soon. It's unproductive and a waste of everyone's time, so please stop.

[Image: 7oDSbD4.gif]
Find all posts by this user
Like Post Quote this message in a reply
10-09-2012, 04:16 PM
RE: Heat is the average of the randomized motion



Member of the Cult of Reason

The atheist is a man who destroys the imaginary things which afflict the human race, and so leads men back to nature, to experience and to reason.
-Baron d'Holbach-
Bitcion:1DNeQMswMdvx4xLPP6qNE7RkeTwXGC7Bzp
Find all posts by this user
Like Post Quote this message in a reply
10-09-2012, 07:43 PM
RE: Heat is the average of the randomized motion
[Image: tumblr_lf78cbQkM21qaa34so1_500.jpg]

Member of the Cult of Reason

The atheist is a man who destroys the imaginary things which afflict the human race, and so leads men back to nature, to experience and to reason.
-Baron d'Holbach-
Bitcion:1DNeQMswMdvx4xLPP6qNE7RkeTwXGC7Bzp
Find all posts by this user
Like Post Quote this message in a reply
[+] 1 user Likes fstratzero's post
Post Reply
Forum Jump: