Wen-Ching is working to develop a preliminary cost-benefit analysis for a website to support the leasing department at a major university. She developed the following estimates.
Development costs – Personnel
2 Systems Analysts       350 hours each at $80/hour
2 Agile Programmer/testers   350 hours each at $70/hour
1 Web designer           100 hours at $125/hour
1 Telecom specialist       20 hours at $150/hour
1 Database specialist       110 hours at $100/hour
Development costs – Training
2 interactive training seats    $3000/student
Development costs – Hardware and Software
1 Development Server       $2500
8 DBMS client licenses       $250/client
Annual operating costs – Personnel
1 Programmer/analyst       300 hours each at $65/hour
Annual operating costs – Hardware, software, misc.
1 maintenance agreement, server       $995
1 maintenance agreement, DBMS       $525
The benefits of the new system are expected to come from two sources: increased occupancy and ability to charge additional rent due to convenience. The benefit from occupancy is expected to total $30,000 in the first year of the system’s operation, and will grow at a rate of 10% per year. Rental increase is expected to realize $15,000 per year. Assume that personnel costs rise at 4%/year.
Following the model presented in the lecture, develop a spreadsheet that summarizes the project’s cash flow, assuming a four-year payback period after the project is developed.
Following the model presented in the lecture, compute the present value of the cash flows using an interest rate of 4%.
1.   What is the ROI?
2.   What is the break-even point?
3.   What is the NPV for this project?
4.   Should this project be approved?

Which of the following accounts is not closed at the end of an accounting cycle?

Multiple Choice

• A. Revenues

• B. Retained earnings

• C. Dividends

• D. Expenses

In an imaginary closed economy, the market for loanable funds is in equilibrium in which the government is running a balanced budget. In equilibrium, GDP, consumption expenditure and government expenditure are $4,000 million, $2,500 million and $1,000 million, respectively.

a. Calculate private saving, public saving, taxes and investment.

b. In order to finance for additional expenditures in the future, suppose the government is running a budget deficit in which it raises fund through selling government bonds in the open market. Explain the effects of this policy on the real interest rate and investment.

c. If the imaginary economy is a closed economy, what is the relationship between domestic investment and national saving?

d. If the imaginary economy has a reform, and then changes to an open economy, what is the new relationship between domestic investment and national saving?

Which of the following accounts should be closed to the capital account at the end of the year?

In a closed system with a mobile border, a wet vapor with X = 1 is contained. The system undergoes heating keeping the plunger at rest, however the pressure and temperature change to 2MPa and 800 ° c, respectively. Subsequently, the heating process continues at constant pressure until the system reaches a temperature of 1300 ° c, generating an expansion process.
a) estimate the initial pressure of the system
b) calculate the work done by the steam
c) calculate the total heat transferred to the water vapor
d) represent the process on a T-v diagram

1. When a switch is closed in a RL circuit with a battery, which of the following statement is TRUE?

1. Back emf is maximum in the beginning and decreases exponentially with time
2. Back emf is zero in the beginning and increases exponentially with time
3. Current is maximum in the beginning and decreases exponentially with time
4. Current is zero in the beginning and increases exponentially with time

2. When an inductor is connected to an AC voltage source with V_max= 5 V and frequency, f = 100 Hz, its inductive reactance is 49 Ohms. How would you increase the inductive reactance of the inductor in the circuit?

a.increase the frequency of the voltage source

b.increase the V_max of the voltage source

c.decrease the V_max of the voltage source

d.decrease the frequency of the voltage source

3. When a capacitor is connected to an AC voltage source with V_max= 5 V and f = 100 Hz, its capacitive reactance is 35 Ohms.  How would you increase the capacitive reactance of the capacitor in the circuit?

a. increase the frequency of the voltage source

b. increase the V_max of the voltage source

c. decrease the frequency of the voltage source

d. decrease the V_max of the voltage source

4. In an LCR series circuit connected to a variable frequency AC voltage source, if the frequency is changed keeping the V_rms constant, why does the Irms in the circuit change? What is the condition for maximum I_rms in the circuit?

A gas at a pressure of 2.00 atm is contained in a closed container. Indicate the changes in its volume when the pressure undergoes the following changes at constant temperature. (Assume that the volume of the container changes with the volume of the gas.)

Part A The pressure increases to 8.50 atm . Give your answer as a factor. Vo is the original volume of the gas (container).

V1 =

In a closed economy, the supply of money may be controlled by the Central Bank in three ways: Reserve requirements , Open market operations, Discount rates.

Outline each of the three ways.