Question & Answer

Two flat plates, separated by a space of 4 mm, are moving relative to each other at a velocity of 5 m/sec. The space between them is occupied by a fluid of unknown viscosity. The motion of the plates is resisted by a shear stress of 10 Pa due to the viscosity of the fluid. Assuming that the velocity gradient of the fluid is constant, determine the coefficient of viscosity of the fluid.

A silicon wafer with a diameter of 200 mm is processed over a circular area whose diameter = 190 mm. The chips to be fabricated are square with 10 mm on a side. The density of point defects in the surface area is 0.0047 defects/cm2. Determine an estimate of the number of good chips using the Bose-Einstein yield computation.

In a turning operation on ductile steel, it is desired to obtain an actual surface roughness of 63 µ-in with a 2/64 in nose radius tool. The ideal roughness is given by Eq. (24.1) and an adjustment will have to be made using Figure 24.2 to convert the 63 µ-in actual roughness to an ideal roughness, taking into account the material and cutting speed. Disposable inserts are used at a cost of $1.75 per cutting edge (each insert costs $7.00 and there are four edges per insert). Average time to change each insert = 1.0 min. The workpiece length = 30.0 in and its diameter = 3.5 in. The machine and operator’s rate = $39.00 per hour including applicable overheads. The Taylor tool life equation for this tool and work combination is given by: vT0.23 f 0.55 = 40.75, where T = tool life, min; v = cutting speed, ft/min; and f = feed, in/rev. Solve for (a) the feed in in/rev that will achieve the desired actual finish, (b) cutting speed for minimum cost per piece at the feed determined in (a). Hint: To solve (a) and (b) requires an iterative computational procedure. Use of a spreadsheet calculator is recommended for this iterative procedure

Why will the short-run consumption function be different from the long-run consumption function?

What purpose does the variety in bond features (types and characteristics) serve?

1. A key policy objective of the UK Coalition government, achieved in April 2014, was to raise the personal income tax allowance to £10 000. This has been accompanied by the gradual removal of the same allowance from those earning over £100 000 (see Table 11.3). Evaluate these policies. 2. What would the effects be of cuts in (i) the basic rate of tax; (ii) the top rate of tax? 3. What tax changes (whether up or down) will have a positive incentive effect and also redistribute incomes more equally?

1. If production were at point a in Figure 24.8, describe the process whereby equilibrium at point P1C1 would be restored under perfect competition. 2. Why would production be unlikely to take place at P1C1 if competition were not perfect?

It is often argued that international convergence of economic indicators is a desirable objective. Does this mean that countries should all seek to achieve the same rate of economic growth, monetary growth, interest rates and budget deficits as a percentage of their GDP, etc?

Shetland Inc. had pretax financial income of $154,000 in 2014. Included in the computation of that amount is insurance expense of $4,000 which is not deductible for tax purposes. In addition, depreciation for tax purposes exceeds accounting depreciation by $10,000. Prepare Shetland’s journal entry to record 2014 taxes, assuming a tax rate of 45%.

Kathleen Battle says, “Retained earnings should be reported as an asset, since it is earnings which are reinvested in the business.” How would you respond to Battle?

Celine Dion Corporation purchases a patent from Salmon Company on January 1, 2014, for $54,000. The patent has a remaining legal life of 16 years. Celine Dion feels the patent will be useful for 10 years. Prepare Celine Dion’s journal entries to record the purchase of the patent and 2014 amortization.

How are product variety and production quantity related when comparing typical factories?

If speculators had better information about future exchange rates, would their actions be more or less stabilising than at present?

1.      : Create a new position at the firm that will allow Farhad to do the reports and reconciliations for several account managers, freeing the account assistants to concentrate on public contact work. Make it clear that he will have little chance of future promotion unless his English improves markedly.

Determine the bending force required in Problem 20.9 if the bend is to be performed in a V-die with a die opening dimension of 40 mm. The material has a tensile strength of 600 MPa and a shear strength of 430 MPa

Presented below is the SEC-mandated disclosure of contractual obligations provided by Deere & Company in a recent annual report. Deere & Company reported current assets of $27,208 and total current liabilities of $15,922 at year-end. All dollars are in millions.   Instructions (a) Compute Deere & Company’s working capital and current ratio (current assets 4 current liabilities) with and without the contractual obligations reported in the schedule. (b) Briefly discuss how the information provided in the contractual obligation disclosure would be useful in evaluating Deere & Company for loans (1) due in one year and (2) due in five years.

A single-point HSS tool with a 3/64 in nose radius is used in a shaping operation on a ductile steel workpart. The cutting speed is 120 ft/min. The feed is 0.014 in/pass and depth of cut is 0.135 in. Determine the surface roughness for this operation.

1.      : Have the successes of sales associates such as Katherine or Damien created a situation in which customers’ loyalty to particular salespeople is stronger than their loyalty to the store? For example, if a successful associate leaves Morgan’s, might the customer leave also?

In a production turning operation, the foreman has decreed that a single pass must be completed on the cylindrical workpiece in 5.0 min. The piece is 400 mm long and 150 mm in diameter. Using a feed = 0.30 mm/rev and a depth of cut = 4.0 mm, what cutting speed must be used to meet this machining time requirement?

Assume that the demand for a product is given by the following function                QD = 1000 – 50P + 2P2 + 10PS + PS2 where QD is the quantity demanded, P is the price of the good and PS  is the price of a substitute good. What is the partial derivative of this demand function with respect to (a) the price of the good; (b) the price of the substitute good? Interpret the meaning of each partial derivative.

] Megan and Matthew are equal partners in the J & J Partnership (calendar-year-end entity). On January 1 of the current year, they decide to liquidate the partnership. Megan’s basis in her partnership interest is $100,000, and Matthew’s is $35,000. The two partners receive identical distributions, with each receiving the following assets: Tax BasisFMV Cash $ 30,000 $ 30,000 Inventory 5,000 6,000 Land 500 1,000    Totals $ 35,500 $37,000 a. What are the amount and character of Megan’s recognized gain or loss? b. What is Megan’s basis in the distributed assets? c. What are the amount and character of Matthew’s recognized gain or loss? d. What is Matthew’s basis in the distributed assets?

What are the potential costs and benefits of mergers to (i) shareholders; (ii) managers; (iii) customers?

List some factors that could cause an increase in the credit items of the balance of payments and a decrease in the debit items. What would be the effect on the exchange rate (assuming that it is freely floating)? What effect would these exchange rate movements have on the balance of payments?

Why is flash desirable in impression die forging?

1. Name some industries where external economies of scale are gained. What are the specific external economies in each case? 2. Would you expect external economies to be associated with the concentration of an industry in a particular region?