Statement:The ensemble average behavior of a wave function resembles that of a classical particle.
Proof:
We have followed the mathematical formulation governed by Schrodinger's picture
(a)(1)
Last term in above equation vanishes, since does not depend upon explicitly. From (a) and its complex conjugate, (1) can be written as (2)
Let's evaluate the second integral in the square brackets of (2). (3)
According to divergence theorem, LHS of (3) is nothing but surface integral of the quantity in parentheses. (4)
Since the volume integral is being evaluated over entire space, the wave function is presumed to vanish at large distances and so does LHS of (4). Thus, (5)
This makes (2) to look like (6)
Once again, the quantity in square brackets of (6) can be simplified as (7)
Using end result of (7) in (6), (8)
Let's now calculate the time derivative of expectation x - component of momentum: (9)
Invoking Schrodinger's equation (a) and its complex conjugate again, (9) proceeds as follows: (10)
First integral has two terms. It turns out that second term of the integral cancels first. This can be seen below - (11)
or (12)
LHS of (12) vanishes due to the same argument as given for (4). Thus, (13)
Hence first step of (10) and (13) suggest that the first integral in (10) vanishes. Moreover we obtain a rather simplified form of (10) that proves Ehrenfest's theorem:
No, no houseis earthquake proof.
Because nothing is proof of evolution.
Everclear = 190 Proof - 95% alcohol
80 proof liquor freezes at -34.44°C (-30°F) 80 proof liquor freezes at -34.44°C (-30°F)
1 ounce = 28.3495 grams; 200 alcohol proof = 100% alcohol content. 2 ounces of 80 proof (40% alcohol) whiskey would be 56.699 grams of whiskey with 22.6796 grams of pure alcohol.
that is a thereom
theorem always needs proof
Pythagorean Thereom
The Pythagoream Thereom is a^2 + b^2 = c^2. Written out it is a squared plus b squared equals c squared.
Cause he was the person that did the pythagorean thereom .
Could well have been Pythagoras..?
because of the pthagereon thereom
A2+b2=c2
c2 or what i like to call the pathagoream thereom to the triangle
7
the egyptians used Pythagoras thereom before "Pythagoras" so called founded it.
Euclidean geometry. It describes the relationship between the length of the sides in a right triangle.