4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a as the working fluid.
Identify the compressor. condenser. throttle and the evaporator stages of the cycle and indicate
where heat Qc, is extracted from the cold refrigerator and where. Qa is released to the
environment. Also indicate where the refrigerant is in liquid. gas. or a mixed phase.

(b) Show that the COP = Qc(Qh -Qc) can be expressed in terms of the enthalpies at three points of the
cycle, explaining all steps of the derivation.

Unit V Essay Please write an essay about pollution prevention in the dry cleaning and hydraulic fracturing industries. Include the following items: 1. one-paragraph introduction; 2. five-paragraph review of the Sinshelmer, Grout, Namkoong, Gottlieb, and Latif (2007) dry cleaning article, including an explanation of the common dry cleaning process using perchloroethylene (PCE), problems with PCE, and a review of options to PCE presented in the paper; 3. five-paragraph review (total—not five paragraphs for each article) of the Heywood (2012) article and the Chen, AlWadei, Kennedy, and Terry (2014) article on hydraulic fracturing, including environmental issues with hydraulic fracturing and the P2 solutions presented in each of the two articles (include the use of liquid carbon dioxide); 4. five-paragraph review of the Taylor, Carbonell, and Desimone (2010) article on using liquid carbon dioxide for P2, focusing on how liquid carbon dioxide can be used as a substitute in the dry cleaning industry and in the hydraulic fracturing industry; and a 5. two-paragraph summary to include your overall thoughts about P2 in the dry cleaning and hydraulic fracturing industries, and specifically whether liquid carbon dioxide is a reasonable, cost-effective, and environmentallyfriendly alternative to traditional methods. In order to access the resources below, you must first log into the myCSU Student Portal and access the Academic Search Complete database within the CSU Online Library. Use at least the following references: Chen, J., Al-Wadei, M. H., Kennedy, C. M., & Terry, P. D. (2014). Hydraulic fracturing: Paving the way for a sustainable future? Journal of Environmental and Public Health, 1-10. Heywood, P. (2012, April). Fracking safer and greener? TCE: The Chemical Engineer, 850, 42-45. MEE 6201, Advanced Pollution Prevention 5 Sinshelmer, P., Grout, C., Namkoong, A., Gottlieb, R., & Latif, A. (2007). The viability of professional wet cleaning as a pollution prevention alternative to perchloroethylene dry cleaning. Air and Waste Management Association, 57, 172-178. Taylor, D. K., Carbonell, R., & Desimone, J. M. (2010). Opportunities for pollution prevention and energy efficiency enabled by the carbon dioxide technology platform. Annual Review of Energy and the Environment, 25(1), 115-148.

1) From the following particulars, calculate:

(a) P / V Ratio

(b) Profit when sales are OMR. 40,000, and

(c) New break-even point if selling price is reduced by 10%

Fixed cost = OMR. 8,000

Break-even point = OMR. 20,000

Variable cost = OMR. 60 per unit

2)Fixed cost  OMR. 8,000

Profit earned  OMR. 2,000

Break-even sales   OMR. 40,000

What is the actual sales?

3)

You are given the following data:

Fixed expenses OMR. 4,000

Break-even point OMR. 10,000

Calculate--

(i) PV ratio

(ii) Profit when sales are OMR. 20,000

(iii) New break-even point if selling price is reduced by 20%

4)

Given the following information:

Units of output   500,000

Fixed cost  OMR. 750,000

Variable cost per unit  OMR. 2

Selling price per unit  OMR. 5

  You are required to determine:

(i) The break-even point

(ii) The sales needed for a profit of OMR. 6,00,000 and

(iii) The profit if 400,000 units are sold at OMR. 6 per unit

A stick of length L moves past you, parallel to its length, at speed v. Let your frame be S, and the stick's frame be S'. Call the event when the front of the stick passes you Event A, and the event when the back of the stick passes you Event B.

Draw the Minkowski diagram to scale, including both frames, and putting in both events.

Answer the following questions:

1. An object with mass M and velocity V has kinetic energy K= 1/2MV^2. If the velocity of the object is reduced to 1/5V, then its new kinetic energy is: a)1/5K b) 5K c)1/25K d) 25K

2. Velocity is a vector, therefore it has magnitude and direction. In a circular motion, the change in magnitude and direction of velocity respectively produce: a) centripetal acceleration and tangential acceleration b) tangential acceleration and centripetal acceleration c) tangential force and centripetal force d) centripetal force and tangential force

3. By the work and energy theorem, work is equal to the change in kinetic energy. If the unit of energy is Joule, then the unit (s) of work is (are): a) Kg x m/s^2 b) N/m c) N x m d) N

4.If two spheres of masses M subscript 1 and M subscript 2 move in opposite directions, one to the right and the other to the left. After the crash: a) the sphere of mass M subscript 1 remains at rest. b) the sphere of mass M subscript 2 remains at rest. c) the two spheres continue to move in one direction d) cannot be determined

5. A particle of mass M and velocity V has a kinetic energy K. If the energy of the particle changes to 25 K, then the velocity of the particle changes to: a) 25V b) 1/5V c) 5V d) 10V

/v

Jerry had been drinking all evening at the Bonger Bar and became visibly intoxicated. The bartender continued to serve him. Thereafter, Jerry left the Bonger Bar and, still visibly intoxicated, went to Gordon’s Restaurant, where he had another drink. While driving home from Gordon’s Jerry drove his car in the wrong lane and crashed head-on with another car. Both Jerry and the driver of the other car suffered serious injuries. Both sued Gordon’s and Bonger Bar. Who is liable to whom?

Consider a particle moving in two spatial dimensions, subject to the following potential:
V (x, y) = (
0, 0 ≤ x ≤ L & 0 ≤ y ≤ H
∞, otherwise.
(a) Write down the time-independent Schr¨odinger equation for this case, and motivate
its form. (2)
(b) Let k
2 = 2mE/~
2 and rewrite this equation in a simpler form. (2)
(c) Use the method of separation of variables and assume that ψ(x, y) = X(x)Y (y).
Rewrite the equation in terms of X and Y . (2)
(d) Divide by XY and solve for X00/X.
(e) Define a separation constant λ and write down the general solution for X(x). (2)
(f) Apply the boundary conditions in the x-dimension and obtain Xn(x). (4)
(g) Write down the general solution for Y (y). (2)
(h) Apply the boundary conditions in the y-dimension and obtain Ym(x). (3)
(i) Normalise ψnm(x, y). Make use of the fact that x and y are independent and that
the two integrals may thus be solved independently. (2)
(j) From the definition of k and using λ, obtain the discrete energies Enm. If we
define Enm ≡ Ex + Ey, write down expressions for the latter two terms

How do i change the vector v to size 20 in C++.

Also given the following, which line of code stores 40 into the 4th column of the 6th row of array dataVals?

const int rows = 7;
const int cols = 5;
int dataVals[rows][cols];

Select one:

a. dataVals[5, 3] = 40;

b. dataVals[5 * 3] = 40;

c. dataVals[3][5] = 40;

d. dataVals[5][3] = 40;

Four capacitors are placed within an 18.0 V circuit as follows:

Two capacitors 30.0 μF and 65.0 μF are connected in series with the battery, followed by two capacitors 45.0 μF and 80.0 μF connected in parallel.

1. You must draw and completely label the circuit.

2. Then find the charge stored on and the voltage across each capacitor within the circuit.