11–114 A small aluminum ball with D 5 2 mm and rs 5 2700 kg/m3 is dropped into a large container filled with oil at 408C (rf 5 876 kg/m3 and m 5 0.2177 kg/m·s). The Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 114 Problem 11-114
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11–128 An airplane has a total mass of 18,000 kg and a wing planform area of 35 m2. The density of air at the ground is Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 128 Problem 11-128
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questions—m….docx
11–112 During an experiment, three aluminum balls (rs 5 2600 kg/m3) having diameters 2, 4, and 10 mm Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 112 Problem 11-112
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11–126 Air at 308C flows over a 3.0-cm-outer-diameter, 45-m-long pipe with a velocity of 6 m/s. Calculate the drag Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 126 Problem 11-126
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11–111E Janie likes to drive with a tennis ball on her car antenna. The ball diameter is D 5 2.62 in and its equivalent Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 111 Problem 11-111E
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questions—m….docx
12-32 Cost-plus and market-based pricing. Florida Temps, a large labor contractor, supplies contract labor to building-construction companies. For 2012, Florida Temps has budgeted to supply 84,000 hours of contract labor. Its variable costs are $13 per hour, and its fixed costs are $168,000. Roger Mason, the general manager, has proposed a cost-plus approach for pricing labor at full cost plus 20%.
Required
1. Calculate the price per hour that Florida Temps should charge based on Mason’s proposal.
2. The marketing manager supplies the following information on demand levels at different prices:
Price per Hour Demand (Hours)
$16……………………..124,000
17………………………104,000
18………………………..84,000
19………………………..74,000
20……………………….61,000
Florida Temps can meet any of these demand levels. Fixed costs will remain unchanged for all the demand levels. On the basis of this additional information, calculate the price per hour that Florida
Temps should charge to maximize operating income.
3. Comment on your answers to requirements 1 and 2. Why are they the same or different?
12. A corporation enters into a $35 million notional principal interest rate swap. The swap calls for the corporation to pay a fixed rate and receive a floating rate of LIBOR. The payments will be made every 90 days for one year and will be based on the adjustment factor 90/360. The term structure of LIBOR when the swap is initiated is as follows:
Days
Rate
90
7.00%
180
7.25
270
7.45
360
7.55
a. Determine the fixed rate on the swap.
b. Calculate the first net payment on the swap.
c. Assume that it is now 30 days into the life of the swap. The new term structure of LIBOR is as follows:
Days
Rate
60
6.80%
150
7.05
240
7.15
330
7.20
Calculate the value of the swap.
12.2 The returns for the past five years on Douglas stock and the New York Stock Exchange Composite Index (NYSE) are listed below: Douglas NYSE 0.05 0.12 0.05 0.01 0.08 0.06 0.15 0.10 0.10 0.05 a. W
12.10-4. Countercurrent Multistage Leaching of Halibut Livers. Fresh halibut livers contain- ing 25.7 wt % oil are to be extracted with pure ethyl ether to remove 95% of the oil in a countercurrent multistage leaching process. The feed rate is 1000 kg of fresh livers per hour. The final exit overflow solution is to contain 70 wt % oil. The retention of solution by the inert solids (oil-free liver) of the liver varies as follows (C1), where N is kg inert solid/kg solution retained and yA is kg oil/kg solution: YA 2.47 0.4 1.67 0.6 yA 4.880 1.39 0.81 .50 0.2 rt 2 Separation Process Principles Calculate the amounts and compositions of the exit streams and the tota of theoretical stages. l number
11.You have been charged with the responsibility of implementing a facilities design project for bagging ammonium nitrate fertilizers (granular substance) in 10, 20 and 30 kg, plastic and paper bags and shipping through railway box cars. The facility includes screw conveyor system for transporting fertilizers from the production plant to the bagging workstation, automatic weighing scale, turret hopper with spouts for bagging, heat sealer (for plastic bags)/sewing machine (for paper bags), steel wheel conveyor system for moving bags to railway box car and palletizer for stacking bags in the railway box car. (a) Explain the problems that you envisage with particular reference to heat sealer, sewing machine, steel wheel conveyor and palletizer. (b) State the factors that must be considered in the selection and installation—of the various material handling equipment.
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