Thinking Like An Engineer: An Active Learning Approach, Student Value Edition (4th Edition)
4th Edition
ISBN: 9780134640150
Author: STEPHAN, Elizabeth A.; Bowman, David R.; Park, William J.; Sill, Benjamin L.; Ohland, Matthew W.
Publisher: PEARSON
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Chapter 15, Problem 9RQ
You are studying the properties of tiny spheres generated by an automated process. You collect data on a large number of the spheres and record this data in the two-row matrix SphereData Each pair of values (each column) represents the data for a specific sphere. The first row of sphereData contains the diameters of the spheres in millimeters; the second row contains the masses of the corresponding spheres in micrograms. Write a single MATLAB command to achieve each of the following tasks.
a. Create a third row in sphereData that contains the volumes [cubic millimeters] of the corresponding spheres represented in the first two rows of sphereData
b. Create a fourth row in sphereData that contains the specific gravities of the corresponding spheres represented in sphereData
c. Create a column
First element: Average diameter of all spheres
Third element: Maximum diameter of all spheres
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You are working as an engineer in a bearing systems design company. The flow of
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y = +h
I
2h = 1 cm
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y = -h
u(y)
1 dP
2μ dx
-y² + Ay + B
moving plate
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U
2
I2
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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
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engine intake and the exhaust nozzle, indicated in Figure Q2a. The turbojet engine can
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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
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472 m/s
A B
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H
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B
engine
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F
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Chapter 15 Solutions
Thinking Like An Engineer: An Active Learning Approach, Student Value Edition (4th Edition)
Ch. 15.1 - Which of the following are valid MATLAB variable...Ch. 15.1 - Which of the following assignment statements are...Ch. 15.1 - a. Store all workspace variables in the file...Ch. 15.2 - Write MATLAB code to complete the following...Ch. 15.2 - a. Calculate the two roots of the quadratic...Ch. 15.3 - Each problem should be done with a single MATLAB...Ch. 15.3 - Assume a row vector named vals has already been...Ch. 15.3 - a. Place the indices of all nonzero elements of...Ch. 15.3 - a. Create a column vector CV1 containing 123...Ch. 15.3 - Comprehension Check 15-1 0 a. Assume you have four...
Ch. 15.3 - a. Write a single MATLAB command that will create...Ch. 15.4 - a. Create the matrix CCM1=[180.34.11017] using a...Ch. 15.4 - Write single MATLAB statements to perform each of...Ch. 15.4 - Write single MATLAB statements to perform each of...Ch. 15.4 - Write single MATLAB statements to perform each of...Ch. 15.4 - Write single MATLAB statements to perform each of...Ch. 15.4 - For each of the following questions, write a...Ch. 15.5 - a. Create a variable named MTS containing the text...Ch. 15.6 - Assume a cell array named CA has three cells in a...Ch. 15.6 - Prob. 21CCCh. 15.7 - Create a structure array named Resistors...Ch. 15.7 - Use the data stored in MetalData to answer the...Ch. 15.7 - The structure array named Hdwr has the following...Ch. 15 - Which of the following are not valid MATLAB...Ch. 15 - Prob. 2ICACh. 15 - For the following questions, assume that the...Ch. 15 - For each calculation described below, write a...Ch. 15 - For each calculation described below, write a...Ch. 15 - For each of the vectors described below, write a...Ch. 15 - Assume the following vectors are already defined:...Ch. 15 - For each of the following sequences, write a...Ch. 15 - Modify the following statements so that they are...Ch. 15 - Assume you have three equal-length row vectors....Ch. 15 - Write the MATLAB code necessary to create the...Ch. 15 - For each of the following problems, write a single...Ch. 15 - Assume you have two equal-length row vectors IV1...Ch. 15 - Write the MATLAB code necessary to create the...Ch. 15 - Assuming t = [9 10; 11 12] and v = [2 4;6 8;10 12]...Ch. 15 - Determine solutions to the following problems a....Ch. 15 - For each of the following problems except part...Ch. 15 - Assume you have an N M matrix named Gonzo For...Ch. 15 - For each of the following tasks. write a single...Ch. 15 - Determine the contents of the variables created or...Ch. 15 - For each of the following tasks, write a single...Ch. 15 - For each of the following problems, write a single...Ch. 15 - Each of the following questions contains a...Ch. 15 - Prob. 25ICACh. 15 - Assume a cell array CA1 has already been defined....Ch. 15 - Prob. 27ICACh. 15 - You are setting up a structure array named client...Ch. 15 - You have three temperature values [C] stored in...Ch. 15 - You have N temperature values [C] stored in the...Ch. 15 - Assume four row vectors named Prod10, Prod11,...Ch. 15 - You have a 2 N matrix named GasData. The first...Ch. 15 - Assume the matrix M99 has at least two rows and at...Ch. 15 - Assume a matrix named Prod contains data on...Ch. 15 - You are studying the effects of climate change on...Ch. 15 - You are studying the properties of tiny spheres...Ch. 15 - Assume you have a four-column matrix named...Ch. 15 - One very old method of sending secret messages is...Ch. 15 - Prob. 13RQCh. 15 - Prob. 15RQCh. 15 - Refer to the specifications for Review Questions...
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