25. Give an example of a nanomaterial that is >100 years old. 26. An ideal metal would be expected to expel electromagnetic fields (i.e. reflect EM waves). Why do some metals and metallic oxides have colour (even look black)? 27. How can a metal be modified to become black?28. What can be done to mitigate the effect of tunnelling across gate oxides in integrated microelectronics?
A Cypress Video Store (CVS) runs a series of fairly standard video stores. Before a video can be put on the shelf, it must be catalogued and entered into the video database. To rent a video, every customer must have a valid CVS customer card. Customers rent videos for three days at a time. Every time a customer rents a video, the system must ensure that he or she does not have any overdue videos. If so, the overdue videos must be returned and the customer must pay a fine before renting more videos. Likewise, if the customer has returned overdue videos, but has not paid the fine, the fine must be paid before new videos can be rented. Every morning, the store manager prints a report that lists the overdue videos.
Based on the readings and your research, select one program design technique of your choice (structure chart, Use Cases, ERD, and DFD). Using MS Visio software, create a diagram for the CVS system to process video renting activities. Copy and paste your diagrams into a Word document. Explain in a short paragraph why you chose this technique? Make sure you cite your sources with APA guidelines.
24.Which department is customarily held responsible for an unfavorable materials quantity variance? A. Quality control. B. Purchasing. C. Engineering. D. Production.
3.1. Use a diagram to explain how a decrease in government spending will affect the level of income in the Keynesian model. (Explanation) 3.2. Use a diagram to explain how an increase in taxes will affect the level of income in the Keynesian model. (Explanation) 3.3. South Africa experienced a severe decline in real gross domestic production during the last quarter of 2008 and the two quarters of the first half of 2009. Use an AD-AS model to illustrate and explain the policies that could be used to resolve this situation. (Explanation)
3-1 Cost-volume-profit (CVP) analysis examines the behavior of total revenues, total costs, and operating income as changes occur in the units sold, selling price, variable cost per unit, or fixed costs of a product.
3-2 The assumptions underlying the CVP analysis outlined in Chapter 3 are
1. Changes in the level of revenues and costs arise only because of changes in the number of product (or service) units sold.
2. Total costs can be separated into a fixed component that does not vary with the units sold and a variable component that changes with respect to the units sold.
3. When represented graphically, the behaviors of total revenues and total costs are linear (represented as a straight line) in relation to units sold within a relevant range and time period.
4. The selling price, variable cost per unit, and fixed costs are known and constant.
3-CNF Satisfiability Problem (3-CNF-SAT) 3-CNF-SAT problem is defined as: Is there a set of values for the boolean variables that assigns the value 1 (true) to the boolean expression given in 3-CNF?
2D drawing presentation
Content
1. Title block
2. Dimensions
3. Notes and Symbols
4. Identifications
5. Parts list (BOM)
3D drawing presentation
Content
1. Fill title block
2. Dimensions and tolerances
3. Notes and general informations
4. Identifications
5. Part list
3.Consider a coffee shop that has two types of customers: lawyers and doctors. The demand for espresso by lawyers is given by QL= 18 –3P, where P Is measured in dollars and Q Is measured in ounces. The demand for espresso by doctors is given by QD= 10 –2P. There are equal numbers of lawyers and doctors. The marginal cost of an ounce of espresso is $2. (a)Suppose that the coffee shop can identify which customer is a doctor and which is a lawyer. The shop will offer each type of customer a specific size cup of espresso for some total price. How many ounces of espresso will lawyers be offered, and at what total price? How many ounces of espresso will doctors be offered, and at what total price? (HINT: you should find that lawyers are offered a 12 ounce drink for $48, and doctors are offered a 6 ounce drink for $21. Lawyers and doctors are both tired and rich!) (b)Suppose that the shop owner can no longer distinguish the lawyers from the doctors (e.g., the doctors don’t put on their white coats before getting their espresso).Suppose the shop still offers the two options you found in part (a). That is, each customer has the option of paying $21 for 6 ounces or $48 for 12 ounces. How will the customers respond? (c)Keeping the drink sizes the same (6 ounces and 12 ounces), how should the coffee shop owner change the total prices of the two drinks so that lawyers will buy the lawyer option and doctors will buy the doctors option, and profits are maximized? (d)Describe qualitatively how the coffee shop owners should change the drink sizes (and then the prices) to increase profits even further, while still ensuring that lawyers will buy the lawyer option and doctors will buy the doctors option. (e)Suppose that the coffee shop owner could only charge a single, uniform two-part tariff to all customers. That is, both lawyers and doctors pay the same cover charge Cand per-ounce price p. Describe qualitatively what C and p should be if the shop owner maximizes profits. Can you put upper and / or lower bounds on Cand/or p?
Assume systems analysts are developing a test plan for the user interface of a hotel reservation system. As the front desk clerks are entering customers and payment information into the system, they will be able to either enter an option code into a text box or select an option code from a drop-down list. A combo box was used to implement this, since it was felt that the front desk clerks would quickly become familiar with the most common option codes and would prefer entering them directly to speed up the entry process.
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