EBK THINKING LIKE AN ENGINEER
4th Edition
ISBN: 8220103633512
Author: OHLAND
Publisher: PEARSON
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Chapter 17, Problem 22RQ
An Excel file named DartTosses.xlsx has one worksheet named Darts containing the horizontal and vertical distance from the bull’s-eye of a dart board from 20 different tosses of a dart. A portion of the data is shown below. Write the MATLAB code necessary to determine the darts that were the closest and the farthest from the bull’s-eye. The program should tell the user in the Command Window, using formatted output, the darts that are closest and farthest from the bull’s-eye.
| Dart | X | Y |
| Dart 1 | 4.04 | 0.55 |
| Dart 2 | 2.63 | 0.35 |
| Dart 3 | 1.10 | 2.97 |
| Dart 4 | 4.89 | 5.60 |
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You are working as an engineer in a bearing systems design company. The flow of
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as a parallel, steady, two-dimensional, incompressible flow between two parallel plates.
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y = +h
I
2h = 1 cm
x1
y = -h
u(y)
1 dP
2μ dx
-y² + Ay + B
moving plate
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U
2
I2
L = 10 cm
Figure Q1: Flow in a hydrodynamic bearing. The plates extend a width, W = 20 cm,
into the page.
Question 1
You are working as an engineer in a bearing systems design company. The flow of
lubricant inside a hydrodynamic bearing (µ = 0.001 kg m¯¹ s¯¹) can be approximated
as a parallel, steady, two-dimensional, incompressible flow between two parallel plates.
The top plate, representing the moving part of the bearing, travels at a constant speed,
U, while the bottom plate remains stationary (Figure Q1). The plates are separated by
a distance of 2h = 1 cm and are W = 20 cm wide. Their length is L = 10 cm. By
applying the above approximations to the Navier-Stokes equations and assuming that
end effects can be neglected, the horizontal velocity profile can be shown to be
1 dP
u(y)
=
2μ dx
-y² + Ay + B
y= +h
Ꮖ
2h=1 cm
1
x1
y = −h
moving plate
stationary plate
2
X2
L = 10 cm
Figure Q1: Flow in a hydrodynamic bearing. The plates extend a width, W = 20 cm,
into the page.
(a) By considering the appropriate boundary conditions, show that the constants take
the following forms:
U
U
1 dP
A =…
Question 2
You are an engineer working in the propulsion team for a supersonic civil transport
aircraft driven by a turbojet engine, where you have oversight of the design for the
engine intake and the exhaust nozzle, indicated in Figure Q2a. The turbojet engine can
operate when provided with air flow in the Mach number range, 0.60 to 0.80. You are
asked to analyse a condition where the aircraft is flying at 472 m/s at an altitude of
14,000 m. For all parts of the question, you can assume that the flow path of air through
the engine has a circular cross section.
(a)
← intake
normal
shock
472 m/s
A B
(b)
50 m/s
H
472 m/s
B
engine
altitude: 14,000 m
exhaust nozzle
E
F
exit to
atmosphere
diameter: DE = 0.30 m
E
F
diameter: DF = 0.66 m
Figure Q2: Propulsion system for a supersonic aircraft.
a) When the aircraft is at an altitude of 14,000 m, use the International Standard
Atmosphere in the Module Data Book to state the local air pressure and tempera-
ture. Thus show that the aircraft speed…
Chapter 17 Solutions
EBK THINKING LIKE AN ENGINEER
Ch. 17.1 - a. Write an input statement to ask for the users...Ch. 17.1 - Prob. 2CCCh. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.1 - a. Create an input dialog that asks users for...Ch. 17.2 - Assume that the variable M is stored in the...Ch. 17.2 - Prob. 7CCCh. 17.2 - Prob. 8CCCh. 17.3 - Create a proper plot of the function D = 50 3t...Ch. 17.3 - Comprehension Check 17-1 0 Create a proper plot of...
Ch. 17.3 - Prob. 11CCCh. 17.4 - Prob. 12CCCh. 17.4 - Prob. 13CCCh. 17.4 - Prob. 14CCCh. 17 - Write a MATLAB statement that results in the input...Ch. 17 - You are writing code that is part of a purchasing...Ch. 17 - For each question dialog described below, write a...Ch. 17 - For each input dialog described below, write a...Ch. 17 - For the following questions, assume z = 100/810....Ch. 17 - For the following questions, z = 100/810. Write...Ch. 17 - Assume that the following variables are stored in...Ch. 17 - Assume that a three-element row vector v already...Ch. 17 - The tiles on the space shuttle are constructed to...Ch. 17 - The specific gravity of acetic acid (vinegar) is...Ch. 17 - Write a MATLAB program that will allow a user to...Ch. 17 - Write a program that will allow the user to type a...Ch. 17 - In order to calculate the pressure in a flask,...Ch. 17 - Write a program that will allow the user to type...Ch. 17 - Use a question dialog to determine whether the...Ch. 17 - Write a MATLAB program that will ask users to...Ch. 17 - Write a program that asks a user to enter, one at...Ch. 17 - Joules first law, also known as the Joule effect,...Ch. 17 - Create a proper plot of the following set of...Ch. 17 - There is currently an effort in the United States...Ch. 17 - You want to create a graph showing the theoretical...Ch. 17 - In 1619, Johannes Kepler proposed his third law of...Ch. 17 - The decay of a radioactive isotope can be...Ch. 17 - Create a proper plot of the theoretical voltage...Ch. 17 - Plot the following functions as assigned by your...Ch. 17 - Plot the following functions as assigned by your...Ch. 17 - Prob. 28ICACh. 17 - Enter the following data into MATLAB. Graph the...Ch. 17 - If an object is heated, the temperature of the...Ch. 17 - The resistance of a typical carbon film resistor...Ch. 17 - Today, most traffic lights have a delayed green,...Ch. 17 - Cadmium sulfide (CdS) is a semiconducting material...Ch. 17 - Your supervisor has assigned you the task of...Ch. 17 - Three different diodes were tested: a constant...Ch. 17 - Design a program that will ask the user to enter...Ch. 17 - If a hot liquid in a container is left to cool,...Ch. 17 - You are an engineer working for M M / Mars...Ch. 17 - 1. The specific gravity of gold is 19.3. Write a...Ch. 17 - An unmanned X-43A scramjet test vehicle has...Ch. 17 - A rod on the surface of Jupiter's moon Callisto...Ch. 17 - The Eco-Marathon is an annual competition...Ch. 17 - Your company wishes to write a computer program...Ch. 17 - You are developing a program to record information...Ch. 17 - In a factory, various metal rods are forged and...Ch. 17 - Write a function and program to determine the mass...Ch. 17 - Write a program to calculate a temperature...Ch. 17 - You are part of an engineering firm on contract...Ch. 17 - You want to create a graph showing the...Ch. 17 - When one tries to stop a car, both the reaction...Ch. 17 - If an object is heated, the temperature of the...Ch. 17 - Capillary action draws liquid up a narrow tube...Ch. 17 - In a turbine, a device used for mixing, the power...Ch. 17 - A pilot tube is a device that measures the...Ch. 17 - Prob. 19RQCh. 17 - Download the weekly retail gasoline and diesel...Ch. 17 - A sample of the data provided in the Microsoft...Ch. 17 - An Excel file named DartTosses.xlsx has one...
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