Name:_____________________________ ENGR 381 Homework #3: Chapter 4 part 1 Due Oct. 7th at the beginning of class. Show your work! Practice problems that should be done but are NOT HANDED IN: 4-4E (answer: -5.14 Btu), 4-9 (answer: 1.355×105 kJ), 4-22 (answer: 25.3 kJ), 4-30E (answers: 40.23 °F, 47.73 lbm, 4167 Btu), 4-34, 4- 35, 4-37. Problems to be handed in: 1. (5 points) A piston/cylinder system contains 1.5 kg of water at 50 kPa and a quality factor of 0.4. Heat transfer occurs to the system until a temperature of 400 °C is achieved. Determine: a. The initial volume of liquid and the initial volume of vapor, both in m3; b. The boundary work out (Wb,out) of the system in kJ; c. The heat transfer in kJ. 2. (5 points) Solve using EES. A gas grill tank (i.e. rigid tank) contains 20 lbm of propane at 70 °F and has a quality factor of 0.001. The tank is left outside during the winter and reaches a temperature of -10°F. Determine: a. The tank volume; b. The initial pressure in psia; c. The final pressure in psia; d. The final quality factor; e. The heat transfer in Btu; Hint: You’ll want to switch the unit system to English units, under Options/Unit System. 3. (5 points) A mass of 3 kg of R-134a undergoes a polytropic process (PVn = constant) from a pressure of 400 kPa and temperature of 70 °C to a final pressure of 800 kPa. The polytropic exponent n is 1.15. Determine: a. The initial volume in m3; b. The final volume in m3; c. The final temperature in °C; d. The boundary work out (Wb,out) in kJ; e. The heat transfer in kJ; f. +1 Extra credit (solve the problem in EES in addition to the hand calculations) 4. (5 points) A piston/cylinder system contains 0.5 kg of saturated solid water (i.e. ice) at -12 °C. Heat transfer occurs to the system until the system contains only saturated vapor. a. What is the boundary work out (Wb,out) in kJ? b. What is the heat transfer in kJ? For EES problems, print the equation and solution windows.

## Name:_____________________________ ENGR 381 Homework #3: Chapter 4 part 1 Due Oct. 7th at the beginning of class. Show your work! Practice problems that should be done but are NOT HANDED IN: 4-4E (answer: -5.14 Btu), 4-9 (answer: 1.355×105 kJ), 4-22 (answer: 25.3 kJ), 4-30E (answers: 40.23 °F, 47.73 lbm, 4167 Btu), 4-34, 4- 35, 4-37. Problems to be handed in: 1. (5 points) A piston/cylinder system contains 1.5 kg of water at 50 kPa and a quality factor of 0.4. Heat transfer occurs to the system until a temperature of 400 °C is achieved. Determine: a. The initial volume of liquid and the initial volume of vapor, both in m3; b. The boundary work out (Wb,out) of the system in kJ; c. The heat transfer in kJ. 2. (5 points) Solve using EES. A gas grill tank (i.e. rigid tank) contains 20 lbm of propane at 70 °F and has a quality factor of 0.001. The tank is left outside during the winter and reaches a temperature of -10°F. Determine: a. The tank volume; b. The initial pressure in psia; c. The final pressure in psia; d. The final quality factor; e. The heat transfer in Btu; Hint: You’ll want to switch the unit system to English units, under Options/Unit System. 3. (5 points) A mass of 3 kg of R-134a undergoes a polytropic process (PVn = constant) from a pressure of 400 kPa and temperature of 70 °C to a final pressure of 800 kPa. The polytropic exponent n is 1.15. Determine: a. The initial volume in m3; b. The final volume in m3; c. The final temperature in °C; d. The boundary work out (Wb,out) in kJ; e. The heat transfer in kJ; f. +1 Extra credit (solve the problem in EES in addition to the hand calculations) 4. (5 points) A piston/cylinder system contains 0.5 kg of saturated solid water (i.e. ice) at -12 °C. Heat transfer occurs to the system until the system contains only saturated vapor. a. What is the boundary work out (Wb,out) in kJ? b. What is the heat transfer in kJ? For EES problems, print the equation and solution windows.

Name:_____________________________ ENGR 381 Homework #3: Chapter 4 part 1 Due … Read More...
Develop a 4 page-500 word précis on Chapter 7 “How to Monitor & Control a TPM Project” of the Wysocki 7th Ed. text.”

## Develop a 4 page-500 word précis on Chapter 7 “How to Monitor & Control a TPM Project” of the Wysocki 7th Ed. text.”

Summary of ‘How to Monitor and Control a TPM Project’ … Read More...
What purpose is directly served by chlorophyll a during photosynthesis?

## What purpose is directly served by chlorophyll a during photosynthesis?

It allows for the conversion of energy. What purpose is … Read More...
My Success Assignment ‘where you want to be in ten years’ Objective Make a plan and try to see all the details. Does some research, ask questions, and consider what it’s going to take to get where you want to be.

## My Success Assignment ‘where you want to be in ten years’ Objective Make a plan and try to see all the details. Does some research, ask questions, and consider what it’s going to take to get where you want to be.

My Road map for career planning is based on … Read More...
10.2 California Imaging Center, a not-for-profit business, is evaluating the purchase of new diagnostic equipment. The equipment, which costs \$600,000 has an expected life of five years and an estimated salvage value of \$200,000 at that time. The equipment is expected to be used 15 times a day for 250 days a year for each year of the project’s life. On average, each procedure is expected to generate \$80 in cash collections during the first year of use. Thus, net revenues for Year 1 are estimated at 15 X 250 X \$80 =\$300,000. Labor and maintenance costs are expected to be \$100,000 during the first year of operation, while utilities will cost another \$10,000 and cash overhead will increase by \$5,000 in Year 1. The cost for expendable supplies is expected to average \$5 per procedure during the first year. All costs and revenues are expected to increase at 5 percent inflation rate after the first year. The center’s corporate cost of capital is 10 percent. a. Estimate the project’s net cash flows over its five-year estimated life. (hint: use the following format as a guide.) Year 0 1 2 3 4 5 Equipment Cost Net revenues Less: labor/maintenance costs Utilities cost Supplies Incremental overhead Operating income Equipment salvage value Net cash flow b. What are the project’s NPV and IRR? (Assume for now that the project has average risk.) c. Assume the project is assessed to have high risk and California Imaging Center adds or subtracts 3 percentage points to adjust for project risk. Now, what is the project’s NPV? Does the risk assessment change how the project’s IRR is interpreted?

## 10.2 California Imaging Center, a not-for-profit business, is evaluating the purchase of new diagnostic equipment. The equipment, which costs \$600,000 has an expected life of five years and an estimated salvage value of \$200,000 at that time. The equipment is expected to be used 15 times a day for 250 days a year for each year of the project’s life. On average, each procedure is expected to generate \$80 in cash collections during the first year of use. Thus, net revenues for Year 1 are estimated at 15 X 250 X \$80 =\$300,000. Labor and maintenance costs are expected to be \$100,000 during the first year of operation, while utilities will cost another \$10,000 and cash overhead will increase by \$5,000 in Year 1. The cost for expendable supplies is expected to average \$5 per procedure during the first year. All costs and revenues are expected to increase at 5 percent inflation rate after the first year. The center’s corporate cost of capital is 10 percent. a. Estimate the project’s net cash flows over its five-year estimated life. (hint: use the following format as a guide.) Year 0 1 2 3 4 5 Equipment Cost Net revenues Less: labor/maintenance costs Utilities cost Supplies Incremental overhead Operating income Equipment salvage value Net cash flow b. What are the project’s NPV and IRR? (Assume for now that the project has average risk.) c. Assume the project is assessed to have high risk and California Imaging Center adds or subtracts 3 percentage points to adjust for project risk. Now, what is the project’s NPV? Does the risk assessment change how the project’s IRR is interpreted?

info@checkyourstudy.cominfo@checkyourstudy.com 10.2 California Imaging Center, a not-for-profit business, is evaluating … Read More...
4. Describe “functional aggregation” and discuss how this is relevant to logistics.

## 4. Describe “functional aggregation” and discuss how this is relevant to logistics.

The inspiration motivating functional aggregation was a rising faith that … Read More...
Ronald Wright, Stolen Continents, Ch. 3, pp. 72-83. It’s posted here on Moodle as a PDF( attached) 1.)What’s your gut reaction to this reading? 2.) Give a summary of the meeting and dialogue between the Inca Emperor Atawallpa and the Spanish. 3.) Give the date, place and basic elements of the successful confrontation the Spanish had with Inca Atawallpa and his soldiers. 4.) According to Wright’s account, what do you think is the main reason or reasons that Inca Atawallpa lost this confrontation? What is the evidence for your conclusion?”

## Ronald Wright, Stolen Continents, Ch. 3, pp. 72-83. It’s posted here on Moodle as a PDF( attached) 1.)What’s your gut reaction to this reading? 2.) Give a summary of the meeting and dialogue between the Inca Emperor Atawallpa and the Spanish. 3.) Give the date, place and basic elements of the successful confrontation the Spanish had with Inca Atawallpa and his soldiers. 4.) According to Wright’s account, what do you think is the main reason or reasons that Inca Atawallpa lost this confrontation? What is the evidence for your conclusion?”

1) The book named “Stolen Continents” is written by Ronald … Read More...