Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 27.1, Problem 2bTH
A long pin is used to hold the piston in place as shown in the diagram. The cylinder is then placed into boiling water.
b. Sketch this process in the PV diagram at right.
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Referring to the figure shown, water contained in a piston–cylinder assembly, initially at 100 kPa and 25°C. The water is heated until the final temperature reaches to 320°C. Kinetic and potential energy effects are negligible.Sketch the process on T-v diagram.
Determinea. The quality of the mixture when piston hits the stop.b. The final pressure.Hint: Establish the problem in three states; 1: initial, 2: when piston hits the stop, 3: at T3 = 320°C.
Efficiency: You haven’t been to the grocery store in a while, and all you can find in yourapartment is a few packets of ‘Ramen’ noodles.
a. Calculate how much energy would be needed to raise the two cups of water you needto cook your noodles to its boiling point.
b. List the sources of inefficiency associated with boiling this water in an electric kettle,and find values for or estimate efficiency values for each energy conversion. Trace backas far as your assumed electricity source.
c. How does the situation change if you heat the water on a gas stove? What inefficienciesare avoided, and what are introduced? Estimate (rough estimates are fine, but state your assumptions clearly) the total amount of gas needed to cook your meal.
Chapter 27 Solutions
Tutorials in Introductory Physics
Ch. 27.1 - Prob. 1aTHCh. 27.1 - In this process, which of the quantities P, V, n,...Ch. 27.1 - Consider the following incorrect student...Ch. 27.1 - Explain why it is not possible to use the ideal...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - Prob. 2cTHCh. 27.2 - Prob. 1aTHCh. 27.2 - Prob. 1bTHCh. 27.2 - Prob. 1cTH
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