Questions asked
determine the mean, median, and the mode of the set 0,0, 1,1, 1, 1, 1, 1, 1, 1,1, 3, 3, 3, 4, 4, 4, 4, 4, and determine if the set is skewed.
Which of the following is an action of latissiumus dorsi? Multiple Choice abduction of arm flexion of arm adduction of arm lateral rotation of arm elevation of arm
Write down the differential equation of motion for the following system shown in the figure below and find an expression of r critical damping coefficient and damped natural frequency.
Sea $f(x) = -10x \sin x$. Utiliza Integración por Partes para calcular $\int f(x)dx$. A = x, B = \cos x, C = -\cos x, D = \sin x, E = -\sin x F = x \cos x, G = -x \cos x, H = x \sin x, I = -x \sin x u = du = dv = v = \int f(x)dx = + c
An increase in autonomous consumer expenditure causes the equilibrium level of aggregate output to at any given interest rate and shifts thecurve to theA) rise; LM; rightB) rise; IS; rightC) fall; LM; leftD) rise; IS; leftE) fall; IS; right
A homeowner purchases solar panels from a contractor the contractor then install the solar panels on the homeowners home which of the following is a positive externality that results from this transaction A Solar panels installation is subsidized by the government B Solar panels reduced dependency and electricity fossil fuel production cleaning the air for all who enjoy it C Solar panel installation creates jobs and income for the contractor D Solar panels reduce the homeowners electricity bill
Huckel theory uses a set of very strong approximations on the matrix elements of the Hamiltonian. Let's examine how we might improve these approximations for a simple conjugated molecule like ethene. For all calculations that follow you can use alpha =-11.4eV and eta =-2.8eV. (A) (5 points) Explain all fundamental assumptions of Huckel theory relative to the fully accurate solution that would be obtained by Hartree-Fock theory. (B) (5 points) In reality, the calculation for the orbital overlap between 2p_(z) orbitals on the carbon atoms of ethene comes out to ∼0.27. Using this value of the overlap matrix and the Hamiltonian assumptions you stated in (A) calculate the total pi -electron energy of ethene. How different is this result from the plain Huckel theory result for ethene? (C) (5 points) Use Extended Huckel theory (H_(ij)=(1)/(2)**1.75**S_(ij)**(H_(ii)+H_(jj))) to calculate the matrix elements H_(ij). Using these matrix elements, as well as the overlap matrix elements in the previous question, calculate the new total pi -electron energy of ethene and compare it to your previous answers. (D) (5 points) Assuming that each Carbon atom has an effective nuclear charge of Z=3.25, write down the full electronic Hamiltonian for ethene accounting for only the pi -electrons. How does the Hamiltonian you wrote down relate to the matrix elements alpha and eta appearing in Huckel theory. (E) (5 points) Does the Huckel theory wavefunction obey all postulates of quantum mechanics? Explain your answer. If it violates any of the postulates, explain mathematically how you would correct Huckel theory. Huckel theory uses a set of very strong approximations on the matrix elements of the Hamiltonian. Let's examine how we might improve these approximations for a simple conjugated molecule like ethene.For all calculations that follow vou can use a = -11.4eV and 3 = -2.8eV. (A) (5 points) Explain all fundamental assumptions of Huckel theory relative to the fully accurate solution that would be obtained by Hartree-Fock theory. (B) (5 points) In reality, the calculation for the orbital overlap between 2pz orbitals on the carbon atoms of ethene comes out to ~0.27. Using this value of the overlap matrix and the Hamiltonian assumptions you stated in (A) calculate the total T-electron energy of ethene. How different is this result from the plain Huckel theory result for ethene? (C) (5 points) Use Extended Huckel theory (H;j = 2 * 1.75 * Sij * (Hii + Hj;)) to calculate the matrix elements Hii. Using these matrix elements, as well as the overlap matrix elements in the previous question, calculate the new total T-electron energy of ethene and compare it to your previous answers. (D) (5 points) Assuming that each Carbon atom has an effective nuclear charge of Z=3.25, write down the full electronic Hamiltonian for ethene accounting for only the T-electrons. How does the Hamiltonian you wrote down relate to the matrix elements a and 3 appearing in Huckel theory. (E) (5 points) Does the Huckel theory wavefunction obey all postulates of quantum mechanics? Explain your answer. If it violates any of the postulates, explain mathematically how you would correct Huckel theory.
Sales C: $4,680,000 Net operating income C: ? Average operating assets C: $1,872,000 Return on investment (ROI) C: ? % Minimum required rate of return: Percentage C: 13 % Dollar amount C: ? Residual income C: $93,600
The above graph shows cost and alternative revenue information for a competitive firm. At which price(s) will this firm shut down? a) At any price below P2. b) At any price below P3. c) At price P1. d) At price P2.
Suppose there are two types of used cars: peaches and lemons. A peach is worth $3000 to a buyer and $1900 to the seller. A lemon, on the other hand, is worth $1000 to a buyer and $500 to the seller. 25% of the used cars at this dealership are peaches and 75% of the used cars at this dealership are lemons. Assume that all parties are risk-neutral, and when buyers and sellers bargain, the agreed sale price is 1. What would be the prices for peaches and lemons if there was perfect information about used car quality? 2. What would be the price of a used car if neither buyers nor sellers knew whether a particular car was a peach or a lemon? 3. After seeking out a report from an independent, third-party evaluator, the sellers now know the identity of each car in the dealership. Assume now that only buyers cannot tell if a car is a peach or a lemon. What will be the market price for used cars immediately after the independent evaluation? 4. Which type of used cars will the sellers sell in this market, based on the market price calculated in 3)? What will be the eventual market price of a used car in this market? 5. Now assume there are as many peaches as lemons (50%/50% split) at the dealership. Continue to assume that buyers cannot tell if a car is a peach or a lemon. What will be the new market price for used cars? 6. Give examples of "signal" and "screening" procedures within this used car market (feel free to branch out from the original scenario but stay in the context of buying a used car).