3 kg of air in a closed movable container undergoes a few processes. Initially, the air with P1=330kPa and T1=70°C is cooled without producing any work until P2= 100kPa, and then it is expanded according to PVn=cont, where n=1.84 until the volume is double. The air again will be heated without changing the volume until the temperature of the air increase to the initial temperature. It is then cooled with constant pressure until the volume becomes 0.5m3. The air undergoes isothermal compression process with Wb=-130kJ. Finally, the air undergoes a polytropic expansion to the initial state.

1.1. Sketch the P-V diagram

1.2. Find all P’s, V’s and T’s

1.3. Calculate all Q’s

1.4. Determine the nett work of the cycle

Use the following information about the closed economy of Vanatu to answer questions 7 and 8:

Y=$35,000
T=$5,000 C=MPC*(Y-T)+$1000-1,000r MPC=0.8
G=$6,500
I=$4000-2,000r

8. Now suppose that the government of Vanatu wants to increase spending on military services. Assume that government purchases increase by $1,500. At the same time, assume the inflation rate in Vanatu is, and remains, 10%. Then

1. a) The nominal interest rate now is 76.7%; private savings increases

2. b) The nominal interest rate now is 67.5%; private savings decreases

3. c) The nominal interest rate now is 33.2%; private savings increases

4. d) The nominal interest rate now is 43.3%; private savings decreases

5. e) The nominal interest rate now is 57.7%; private savings increases

THE ANSWER IS A I AM JUST CONFUSED HOW TO GET THERE

Assume a closed economy without Government. However, there exists a financial sector that creates an array of financial assets on which both households and firms invest. Let ? denote the average earnings from these financial assets. The consumption expenditure of the households is influenced by their wage income and the financial income and is given by ? = ?(?, ?); ?? > 0, ?? > 0, where ??, ?? are partial derivatives of consumption with respect to income ? and financial earnings ? respectively. Similarly, the real investment expenditure of firms is given by ? = ?(?, ?); ?? > 0, ?? < 0, where ??, ?? are the partial derivatives of the real investment with respect to income and financial earnings. Using either the Keynesian cross model or the Multiplier analysis, answer the following questions.

(i) Derive the relationship between output ? and financial earnings ?, and examine the analytical conditions under which the relationship is positive ( ?? ?? > 0) and negative ( ?? ?? < 0). [15]

(ii) Describe why the scenario where the expansion in output driven by the rise in financial earnings, i.e. when ?? ?? > 0, could make the economy unstable and vulnerable to crisis? [5]

We often use grinding in closed circuit, and have a targeted value for a circulated load. What is the formula for the percentage circulating load? Explain why a circulating load is preferable to just grinding until we are sure that everything would pass through the post grinding screen.

Please select True or False: For a satellite in a non-circular, closed, fixed orbit around the Earth, answer which of the following are always true or always false for Kinetic Energy (KE) and Potential Energy (PE).

Answer the following with ;

1. Assume these facts as true: Sen. Burr chaired the Senate Intelligence Committee. At a closed confidential hearing in late January, he heard dramatic evidence that the corona virus was likely to heavily impact the United States and its economy (which is what happened). The following day, Sen. Burr called his stockbroker and told him to sell all of his $2 million worth of stock holdings. Two weeks later, the danger of the corona virus became known to the public, and the stock market lost much value. Sen Burr saved $400,000. By selling his stock when he did. Was Sen Burr an “insider”. Did he violate the insider trading laws? Argue one way or the other but support your argument.

Assume these facts as true. Sen Loeffler attended the above described hearing chaired by Sen. Burr. When she returned home that evening, she told her husband about the hearing. Her husband is Chairman of the New York Stock Exchange. The next day, without telling his wife, he sold $3.5 million worth of stock jointly owned with his wife. He saved $600,000.00 in losses by selling his stock then. Was Sen Loeffler or her husband an “insider”? Did either of them violate the insider trading laws? Argue one way or the other.

2. In a closed economy, how would each of the following events affect bond price and market interest rate? Use the figures of both bond market and market of loanable funds to illustrate the changes to the interest rates.

A. The expected rate of inflation decreases.

B. The federal government runs a budget deficit.

A piston and cylinder device (closed system) contain 2.25 mol of an ideal gas which
is compressed irreversibly at constant temperature from 423 K and 200 kPa to 8 bar.
The irreversible work applied for the compression is 15 % larger than the reversible
work for the same process. Determine the entropy change of the gas, the
surroundings and the total entropy change if the heat is rejected from the gas to
surroundings maintained at 25 oC.

Will a CFL light bulb and an incandescent light bulb, in separate respective closed systems, produce exactly the same amount of overall temperature increase over time?

Assume you have two identical closed systems with gray walls, with a system input of 20 watts of power each.

EDIT added for clarity: (On the packaging of the CFL light bulb the large print equivalent wattage is irrelevant... the input current of both bulbs is a consistent 20 watts of power each. The comparison wattage vs. the actual wattage of the CFL is off subject.)

One has a CFL, one has an ordinary incandescent light bulb. Will both systems increase in heat the exact amount, every hour?

Due to conservation of energy it shouldn't matter if one light source is more efficient, right?... it's the same amount of energy input. One light makes more heat one makes more light, but the light when it hits the gray wall is converted to heat, right?

There is no such thing as loss of energy... it's just converted to another form of energy... and light is converted to heat, right?

The back story of this question is my wondering that if my wife leaves an incandescent light bulb on in the winter time it's not so bad because even though no one is in the room it's still heating up the room. On the other hand if she leaves on a CFL it's more efficient but it should still add heat to our "system," i.e., our home.

Assume a closed economy without Government. However, there exists a financial sector that creates an array of financial assets on which both households and firms invest. Let ? denote the average earnings from these financial assets. The consumption expenditure of the households is influenced by their wage income and the financial income and is given by ? = ?(?, ?); ?? > 0, ?? > 0, where ??, ?? are partial derivatives of consumption with respect to income ? and financial earnings ? respectively. Similarly, the real investment expenditure of firms is given by ? = ?(?, ?); ?? > 0, ?? < 0, where ??, ?? are the partial derivatives of the real investment with respect to income and financial earnings. Note that ?? < 0 implies that the real investment falls as financial earnings for the firm rises. Either using the Keynesian cross model or the Multiplier analysis, answer the following questions.

(i) Identify the “wealth effect” in this model? [2]

(ii) Derive the relationship between output ? and financial earnings ?, and examine the analytical conditions under which the relationship is positive ( ?? ??>0) and negative ( ?? ?? < 0). [15]

(iii) Describe why the scenario where the expansion in output driven by rise in financial earnings, i.e. when ?? ??>0, could make the economy unstable and vulnerable to crisis?