Explain when and how the following are constructed and used. software engineering
a. Data Flow Diagrams
b. Activity Diagrams

In a drag race, the position of a car as a function of time is given by x=bt2, with b = 2.045m/s2 . In an attempt to determine the car's velocity midway down a 400-m track, two observers stand at the 165-m and 235-m marks and note the time when the car passes.What value do the two observers compute for the car's velocity over this 70m stretch?

Monochlorobenzene (C6H5Cl) is produced commercially by the direct catalytic chlorination of benzene (C6H6). In the process, dichlorobenzene(C6H4Cl2) is generated as a coproduct.

?6?6 + ??2 → ?6?5?? + ??? ?6?5?? + ??2 → ?6?4??2 + ???

Given that the molar ratio of benzene to chlorine in the feed is 5 to 1; and the feed contains only benzene and chlorine. Chlorine is the limiting reactant and completely consumed in the reaction. The fractional yield of C6H5Cl is 0.875

. a. Take a basis of 100 mol C6H5Cl produced, draw and label a flowchart. Do a degree of freedom analysis based on atomic species balances.

b. Calculate the amount of feed and product components of the reactor using the atomic species balances. Present the calculated values in a table to prove that the total mass to the reactor is equal to the total mass out from the reactor (mass conservation).

c. Calculate the percentage conversion of C6H6. The value that you have calculated should be low. Why do you think the reactor would be designed for low conversion? What additional processing steps are likely to take place downstream of the reactor in order to improve the conversion?

You are a nonprofit manager and you are preparing for the upcoming fiscal year. You are in charge of leading the budget process for the organization. Briefly describe how you would start to prepare the organization’s budget. What considerations would you need to take into account? Who would you involve in the process? What are the timeline and key activities of the budget process? Once your budget is developed, what steps would you take to ensure the organization is on track to meet its budget?

Preparing a Budget

o Describe the key steps you would take to prepare your nonprofit organization’s budget. Cite at least one academic source to support your response.

o Discuss the considerations that you would need to take into account when preparing the nonprofit organization’s budget. Cite at least one academic source to support your response.

o Describe individuals involved in the budgeting process. o Outline the budgeting process timeline and key activities.

 Ongoing

o Describe the steps you would take to ensure the organization is on track to meet its budget.

The reflecting surfaces of two intersecting flat mirrors are at an angle of 57?, as shown in the figure. A light ray strikes the horizontal mirror at an angle of 57? with respect to the mirror

Process Co has two divisions, A and B. Division A produces three types of chemicals: products L, M and S, using a common process. Each of the products can either be sold by Division A to the external market at split-off point (after the common process is complete) or can be transferred to Division B for individual further processing into products LX, MX and SX.

In November 20X1, which is a typical month, Division A’s output was as follows:

Product             Kg

     L               1,200

     M              1,400

     S               1,800

The market selling prices per kg for the products, both at split-off point and after further processing, are as follows:

                         $                            $

     L               5.60        LX            6.70

     M              6.50        MX           7.90

     S               6.10        SX           6.80

The specific costs for each of the individual further processes are:

Variable cost of $0.50 per kg of LX

Variable cost of $0.70 per kg of MX

Variable cost of $0.80 per kg of SX

Further processing leads to a normal loss of 5% at the beginning of the process for each of the products being processed.

Required

1. Calculate and conclude whether any of the products should be further processed in Division B in order to optimise the profit for the company as a whole.

It has been suggested that Division A should transfer products L and M to Division B for further processing, in order to optimise the profit of the company as a whole. Divisions A and B are both investment centres and all transfers from Division A to Division B would be made using the actual marginal cost. As a result, if Division A were to make the transfers as suggested, their divisional profits would be much lower than if it were to sell both products externally at split-off point. Division B’s profits, however, would be much higher.

Required

       (b) Discuss the issues arising from this suggested approach to transfer pricing.

The Ka of acetic acid is 1.8 x 10^-5 at 25C.

a) What is the pH of a 0.5 M solution of acetic acid at 25C?

b)What is the pH of a solution made up of 20 mL of 0.5 M solution of acetic acid and 10 mL of 0.5 M sodium acetate?

c) If 10 mL of 0.1 M NaOH is added to the solution in part b, what is the final pH?

d) What is the pH of a solution containing equal concentrations of acetic acid and sodium acetate?

You are given displacement equation for object in SHM as: x(t)=1.5cos(3.0t) cm.  

a) The period of this oscillation is:    [ Select ] ["2.1 sec", "3 sec", "1.5 sec", "0.48 sec"]         

b) The amplitude of the motion is:        [ Select] ["0.75 m", "1.5 m", "3.0 m"]      

c) The maximum velocity is: [ Select ] ["28 m/s", "4.5 m/s", "0.72 m/s"]      

d) The displacement at t = 0.5 s is   [ Select ]   ["0.12 m", "-0.78 m", "1.5 m"]      

1. Would a 50:50 solution of R and S enantiomers of the same compound have any effect on plane polarized light shining through it? Why or why not?

2. Based on your answer to the last question, how could you determine the enantiopurity of a given concentration of a sample if you know its specific rotation [α] using a polarimeter?

3. Give an example of a drug which can be sold as a racemic (R and S) mixture without any harmful effects.

A 4.2 kg lead ball is dropped into a 2.4 L insulated pail of water initially at 20.0∘C.

If the final temperature of the water-lead combination is 26.0 ∘C, what was the initial temperature of the lead ball?

3. A student comes up with a new ratio to measure performance: she calls it profit
ratio: ROCE/WACC
o What does it measure? Interpret it.
o Do you consider it a good performance measure? Explain.
o Can you think of a better name for it? Why?

Consider the following two investment alternatives, in which Alternative II is more economically attractive than Alternative I:

                                                        Alternative I                Alternative II

            Initial Investment                    $10,000                       $40,000

            Useful life                               5 years                         10 years

            Terminal market value            $1,000                         $5,000

            Annual expenses                     $20,000                             $7,000

            EUAC (12%), approx.            $22,617                         $13,800

Determine the percent change in the annual expenses for Alternative I that would make the two investments equally attractive. (Enter your answer as a positive or negative number without the percent % sign.)

The Strings Object in particular is full of useful classes and methods. You can parse and manipulate strings using several methods of the String class. These methods enable you to count characters, find and extract characters and substrings, replace characters and substrings, combine characters and substrings, and compare strings.

Questions to answer:

1. Identify three such methods and discuss how they are used. Then use them in simple relevant examples

2. As you research the String class, what are some of the most popular uses of substring searching in use today?
3. Are there any uses of strings not covered by the String class or mentioned in the prompt?
4. Are there other classes that inherit from the String class?
5. How does the String class extend or support the Array class?

1. Suppose a market is in equilibrium (i.e., S=D and profits are normal). If demand increases in this market, the equilibrium price will _____________. Ceteris paribus, what effect will this have on profits?  ______________. What happens next to this market and why? __________________. As a result, what happens to price at the new equilibrium? _______________

2. What does the “double price move” or “price reversal” refer to?

3. At equilibrium in an oligopoly, the size of economic profits will usually depend on the strength of ____________

4. Cartels – What they are and what they seek to do?

5. Suppose a market that had been in equilibrium experiences an increase in demand that result in a higher price for the product. What should you expect to happen to the price in the future and why?

6. We have described oligopoly as often having two very different faces. On the one hand, we often see oligopolies where the firms behave as __________________. On the other hand, we often see oligopolies where firms behave as ______________________

7. In a purely competitive market, an innovation that lowers cost will cause the market price to _________________________

8. Do cost reductions in monopolies or oligopolies usually lead to price reductions? __________. What might happen instead? _______________________________

9. What produces a “natural monopoly?” ____What are patent monopolies? ____

What are the three most common types of radioactive decays? How do they differ? Also how many types of decays are there? Please describe them.