Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 7, Problem 41RQ
To determine
The conditions under which magnesium is explosive.
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A piston–cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m2. Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.26 m3, the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the piston rises 20 cm more.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Determine the work done during this process.
The work done during this process is kJ.
A 4-m × 5-m × 7-m room is heated by the radiator of a steam-heating system. The steam radiator transfers heat at a rate of 10,000 kJ/h, and a 100-W fan is used to distribute the warm air in the room. The rate of heat loss from the room is estimated to be about 5000 kJ/h. If the initial temperature of the room air is 10°C, determine how long it will take for the air temperature to rise to 25°C. Assume constant specific heats at room temperature. The gas constant of air is R = 0.287 kPa·m3/kg·K (Table A-1). Also, cv = 0.718 kJ/kg·K for air at room temperature (Table A-2).
Steam enters the radiator system through an inlet outside the room and leaves the system through an outlet on the same side of the room. The fan is labeled as W sub p w. The heat is given off by the whole system consisting of room, radiator and fan at the rate of 5000 kilojoules per hour.
It will take 831 Numeric ResponseEdit Unavailable. 831 incorrect.s for the air temperature to rise to 25°C.
Chapter 7 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 7 - What types of properties do nonferrous metals...Ch. 7 - For what respects are the nonferrous metals...Ch. 7 - In what ways might the nonferrous metals offer...Ch. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - What properties of copper make it attractive for...Ch. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Why does the copper designation system separate...
Ch. 7 - What are some of the attractive engineering...Ch. 7 - Why might cold�worked brass require a stress...Ch. 7 - Why might the term bronze be potentially...Ch. 7 - What are some attractive engineering properties of...Ch. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - Prob. 17RQCh. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - What is the primary benefit of aluminum recycling...Ch. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Prob. 23RQCh. 7 - Prob. 24RQCh. 7 - How is the corrosion�resistance mechanism...Ch. 7 - Why do aluminum and aluminum alloys present...Ch. 7 - How are the wrought alloys distinguished from the...Ch. 7 - Prob. 28RQCh. 7 - Prob. 29RQCh. 7 - What unique combination of properties is offered...Ch. 7 - Prob. 31RQCh. 7 - Why are aluminum–silicon alloys popular for...Ch. 7 - What specific material properties might make an...Ch. 7 - Prob. 34RQCh. 7 - What are some possible applications of aluminum...Ch. 7 - Prob. 36RQCh. 7 - Describe the designation system applied to...Ch. 7 - Prob. 38RQCh. 7 - Prob. 39RQCh. 7 - How does the ability to strengthen magnesium...Ch. 7 - Prob. 41RQCh. 7 - Prob. 42RQCh. 7 - Prob. 43RQCh. 7 - Prob. 44RQCh. 7 - Prob. 45RQCh. 7 - What feature is used in the designation of...Ch. 7 - What are some of the primary application areas for...Ch. 7 - Prob. 48RQCh. 7 - Prob. 49RQCh. 7 - Prob. 50RQCh. 7 - What are the distinct characteristics of...Ch. 7 - Prob. 52RQCh. 7 - Prob. 53RQCh. 7 - Prob. 54RQCh. 7 - Prob. 55RQCh. 7 - Prob. 56RQCh. 7 - What temperature is generally considered to be the...Ch. 7 - Prob. 58RQCh. 7 - Prob. 59RQCh. 7 - Prob. 60RQCh. 7 - What are some applications of depleted uranium?...Ch. 7 - Prob. 62RQCh. 7 - Prob. 63RQCh. 7 - Prob. 64RQCh. 7 - What are some of the medical applications of...Ch. 7 - Prob. 66RQCh. 7 - Prob. 1PCh. 7 - Identify or select a product in which a magnesium...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - In 2008, The US Environmental Protection Agency...Ch. 7 - For each of the materials identified, determine...Ch. 7 - There are various pairings between the ball and...Ch. 7 - Which of the preceding combinations would you...Ch. 7 - Prob. 1.4CSCh. 7 - Prob. 1.5CSCh. 7 - Prob. 2.1CSCh. 7 - Prob. 2.2CS
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- A piston–cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m2. Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.26 m3, the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the piston rises 20 cm more. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the final pressure and temperature. The final pressure is kPa. The final temperature is ºC. Find the work done during the processarrow_forwardA garden hose attached with a nozzle is used to fill a 20-gal bucket. The inner diameter of the hose is 1 in and it reduces to 0.53 in at the nozzle exit. The average velocity in the hose is 8 ft/s and the density of water is 62.4 lbm/ft3. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the volume and mass flow rates of water through the hose. The volume flow rate of water through the hose is ft3/s. The mass flow rate of water through the hose is lbm/s. The change in time? What is the exit velocity?arrow_forwardA 23-ft3 rigid tank initially contains saturated refrigerant-134a vapor at 160 psia. As a result of heat transfer from the refrigerant, the pressure drops to 50 psia. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the final temperature. Use data from refrigerant tables. The final temperature is ºF.arrow_forward
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