PPKn 213
1.
Pembukaan Undang Undang Dasar Negara RI Tahun 1945 memiliki kedudukan yang sangat penting dalam
tata hukum Indonesia, yaitu sebagai Pokok Kaidah Negara Fundamental karena di dalamnya memuat halhal yang penting dalam kehidupan bernegara antara
This article depicts that how congress may use review act to nullify overtime rule. The
Congressional Review Act (CRA) empowers Congress to revoke new regulations. According to
Alfred Robinson Jr., an attorney with Ogletree Deakins in Washington, D.C.; un
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5.61 Physical Chemistry
1
Lecture #30
MODERN ELECTRONIC STRUCTURE THEORY:
Electron Correlation
In the previous lecture, we covered all the ingredients necessary to choose a
good atomic orbital basis set. In the present lecture, we will discuss the
other h
5.61 Physical Chemistry
Lecture #23
page 1
MANY ELECTRON ATOMS
At this point, we see that quantum mechanics allows us to understand the helium atom,
at least qualitatively. What about atoms with more than two electrons, such as lithium
or carbon? Here, we
5.61 Fall 2013
Lecture #6
page 1
Lecture #6: 3D Box and Separation of Variables
Last time:
Build up to Schrdinger Equation: some wonderful surprises
*
*
operators
eigenvalue equations
*
operators in quantum mechanics especially x = x and p x = in
x
*
5.61 Fall, 2013
Lectures #14 & 15
Page 1
Lectures #14 & #15: NonDegenerate Perturbation Theory I
Last time: finished with Harmonic Oscillator
Foundation for our picture of intramolecular nuclear motions in all molecules.
Emphasis was on creating a non
5.61 Fall 2013
Lecture #12
page 1
Lecture #12: Looking Backward Before First Hour Exam
Postulates, in the same order as in McQuarrie.
1.
2.
3.
4.
5.
(r,t) is the state function: it tells us everything we are allowed to know
For every observable th
5.61 Physical Chemistry
Lecture #33
1
ELECTRONIC SPECTROSCOPY AND PHOTOCHEMISTRY
The ability of light to induce electronic transitions is one of the most
fascinating aspects of chemistry. It is responsible for the colors of the
various dyes and pigments w
5.61 Physical Chemistry
1
Lecture #32
INTERMOLECULAR INTERACTIONS
Consider the interaction between two stable molecules (e.g. water and
ethanol) or equivalently between two noble atoms (e.g. helium and neon). Call
the two species A and B, and suppose they
5.61 Physical Chemistry
Lecture #35+
Page
1
NUCLEAR MAGNETIC RESONANCE
Just as IR spectroscopy is the simplest example of transitions being induced by lights
oscillating electric field, so NMR is the simplest example of transitions induced by the
oscillat
5.61 Physical Chemistry
Lecture #2728
1
HCKEL MOLECULAR ORBITAL THEORY
In general, the vast majority polyatomic molecules can be thought of as
consisting of a collection of twoelectron bonds between pairs of atoms. So
the qualitative picture of and bon
5.61 Physical Chemistry
Lecture #13
1
SPECTROSCOPY: PROBING MOLECULES WITH LIGHT
In practice, even for systems that are very complex and poorly
characterized, we would like to be able to probe molecules and find out as
much about the system as we can so
5.61 Fall 2013
Lecture #10
page 1
Lecture #10: The TimeDependent Schrdinger Equation
Last time:
x
xp =
h
dimensionless variables
pp = [ h ]1/2 p
1/2
annihilation operator
a = 2 ( ipp + xp )
1/2
aO = 2 1/2 ( ipp + xp )
creation operator
xp = 2 1/2
5.61 Fall, 2013
Lecture #7
Page 1
Lecture #7: Classical Mechanical Harmonic Oscillator
Last time
What was surprising about Quantum Mechanics?
Free particle (almost exact reprise of 1D Wave Equation)
Can't be normalized to 1 over all space! Instead: Nor
5.61 Physical Chemistry
2122 Helium Atom
page 1
HELIUM ATOM
Now that we have treated the Hydrogenlike atoms in some detail, we now
proceed to discuss the nextsimplest system: the Helium atom. In this
situation, we have two electrons with coordinates
z
5.61 Fall, 2013
Lecture #16
Page 1
Lecture 16: Rigid Rotor I
So far we have seen several exactly soluble quantum mechanical problems.
1.
Particle in an infinitewall box.
* useful insights into valence states of diatomic and conjugated polyatomic
molec
5.61 Fall 2013
Lecture #2
page 1
Lecture #2: Wave Nature of the Electron
and the Internal Structure of an Atom
Last time: Surprise Light as particle
1.
Photoelectric effect, especially eKE vs. .
Light as packets of energy, called photons, E = h.
2.
C
5.61 Fall, 2013
Lecture #8
Page 1
Lecture #8: Quantum Mechanical Harmonic Oscillator
Last time
Classical Mechanical Harmonic Oscillator
1
* V (x) = kx 2 (leading term in power series expansion of most V(x) potential energy
2
functions)
* x is displa
5.61 Fall 2012
Lecture #19
page 1
HYDROGEN ATOM
Consider an arbitrary potential U(r) that only depends on the distance
between two particles from the origin. We can write the Hamiltonian simply
2
H = 2 + U (r)
2
One interesting potential of this type aris
5.61 Fall 2013
Lecture #4
page 1
Lecture #4: The Classical Wave Equation and Separation of
Variables
Last time:
Twoslit experiment
2 paths to same point on screen
2 paths differ by nconstructive interference
1 photon interferes with itself
get 1 dot on
5.61 Fall 2013
Lecture 18
Page 1
Lecture #18: NonDegenerate Perturbation Theory III
What is Perturbation Theory good for?
1.
Computing the effects (pattern of energy levels, relative transition intensities in a
spectrum, intramolecular dynamics) of a
5.61 Fall, 2013
Lecture #17
Page 1
Lecture #17: Rigid Rotor II
Last time:
1.
Analogy between linear and angular momenta
Momentum =
p
L (or J )
(mass factor)
m
I
=
r02
(the mass factor is more
complicated for polyatomic
molecules)
(vector velocity
5.61 Fall 2013
Lecture #5
page 1
Lecture #5: Begin Quantum Mechanics:
Free Particle and Particle in a 1D Box
Last time:
2u 1 2u
=
x 2 v2 t 2
* u(x,t): displacements as function of x,t
* 2ndorder: solution is sum of 2 linearly independent functions
* ge
Lecture #11: Wavepacket Dynamics for Harmonic Os
cillator and PIB
Last time: TimeDependent Schrodinger Equation
H = i
H
t
H
Express in complete basis set of eigenfunctions of timeindependent H
cfw_n (x), En
cj eiEj t/nj (x)
(x, t) =
j
For 2state s, we