Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
3rd Edition
ISBN: 9780133593211
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 20, Problem 2ICA

Write a function named CountDown that accepts a total time T in seconds and displays the time remaining after half of the previously displayed time has elapsed as described below. The function should also accept an integer Steps as also described below.

The function should immediately display the value of T, and then wait T/2 seconds before displaying T/2. It should then wait T/4 seconds and display T/4, etc. This should continue until only 1/2Steps of the original time remains, at which point it waits for this remaining time, displays a zero, and emits an audio tone.

It is suggested that you look up the pause function and the beep function.

Example: CountDown (60, 6) displays the following by an audio tone.

60 Displayed immediately
30 Displayed 30 seconds later
15 Displayed 15 seconds later
7.5000 Displayed 7.5 seconds later
3.7500 etc.
1.8750 etc.
0.9375 etc.
0 Displayed 0.9375 seconds later accompanied by a beep
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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 process

Chapter 20 Solutions

Thinking Like an Engineer: An Active Learning Approach (3rd Edition)

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