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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Textbook Question
Chapter 7, Problem 7RQ
The longest sea bridge, the Jiaozhou Bay Bridge in China, spans 26.4 miles [mi]. The longest sea bridge in the United States is the Lake Pontchartrain Causeway in Louisiana, which spans 41,940 yards [yd]. How much longer is the Jiaozhou Bridge, in units of feet [ft], than the Lake Pontchartrain Causeway?
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A close end tube of thin-walled circular section may be subjected to torque Tand internal pressure P, as shown in Figure Q3. The shear stress in the wall caused by
the torque can be calculated as T = T/(2πR²t), where the mean radius of the cross section is R(i.e., the radius of the centreline of the wall) and the wall thickness
is t. The internal radius of the tube can be calculated as (R-t/2). However, as R>>t, you can approximately assume that the internal radius of the tube is equal to Rin
the subsequent calculation. The tube is made from a material with Young's modulus E, Poisson's ratio v.
T
Centreline of
the wall
R
P
Ozz
бөө
Orr
Z
бут
бее
Ozz
Figure Q3
(a) If the change of the diameter cannot exceed 0.1 m under elastic deformation, calculate the minimum allowable wall thickness of the cylindrical pressure vessel if
P=23.6 MPa, T=0 KN.m, R = 2 m, Young's modulus E = 246 GPa, and Poisson's ratio v = 0.21.
Step-1
the functional relationships between hoop stress σ and wall thickness…
A cantilever beam of a channel section and length L is loaded by a point load W applied at half-length of the beam through the centroid of the section, as shown in Figure Q1. The material of the beam is aluminum alloy with the Young’s modulus of E .
A bar of length L and of a circular cross-section of diameter D is clamped at the top end and loaded at the other (bottom) end by a point load P as shown in Figure
Q2a. The cross-section of the bar is shown in Figure Q2b indicating that load is applied at the point A. The material used in the bar has specific weight y.
Find the magnitude and location of the maximum normal stress in the bar.
Figure Q2 a
Figure Q2 b
45°
Chapter 7 Solutions
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Ch. 7.1 - Express the following values using an appropriate...Ch. 7.1 - Indicate if the following units are correctly...Ch. 7.3 - Comprehension Check 7-3 The highest mountain in...Ch. 7.3 - To be considered a full-time employee, companies...Ch. 7.4 - In January 2008, Scientific American reported that...Ch. 7.4 - Officially, a hurricane is a tropical storm with...Ch. 7.4 - Many toilets in commercial establishments have a...Ch. 7.5 - Comprehension Check 7-8 A hogshead is a unit of...Ch. 7.5 - Comprehension Check 7-9 In NCAA basketball, a...Ch. 7.5 - A boat is traveling at 20 knots. Convert this...
Ch. 7.6 - Determine the fundamental dimensions of the...Ch. 7.6 - Prob. 12CCCh. 7.6 - Identify the quantity through the use of...Ch. 7.7 - The power absorbed by a resistor can be given by P...Ch. 7.7 - Indicate whether the following equation is...Ch. 7.8 - Eclipses, both solar and lunar, follow a cycle of...Ch. 7.8 - A basketball has a diameter of approximately 27...Ch. 7 - Express the following values using scientific...Ch. 7 - Complete the following table.Ch. 7 - Complete the following table.Ch. 7 - Complete the following table.Ch. 7 - Complete the following table.Ch. 7 - Complete the following table. gallons per minute...Ch. 7 - A category F5 tornado can have wind speeds of 300...Ch. 7 - A new hybrid automobile with regenerative braking...Ch. 7 - The AbioCorTM artificial heart pumps at a rate of...Ch. 7 - If a pump moves water at 70 gallons per minute...Ch. 7 - In China, one "bu" is 1.66 meters [m]. The average...Ch. 7 - Prob. 12ICACh. 7 - In China, one "fen" is defined as 3.3 millimeters...Ch. 7 - A blink of a human eye takes approximately 300-400...Ch. 7 - If the Sl prefix system was expanded to other...Ch. 7 - A "jiffy" is defined as 1/60 of a second [s]....Ch. 7 - A "knot'' is a unit of speed in marine travel. One...Ch. 7 - The Earth's escape velocity is 7 miles per second...Ch. 7 - A manufacturing process uses 10 pound-mass of...Ch. 7 - CA 7-23 Determine the fundamental dimensions of...Ch. 7 - Prob. 21ICACh. 7 - Prob. 22ICACh. 7 - Prob. 23ICACh. 7 - Prob. 24ICACh. 7 - Prob. 25ICACh. 7 - A circular window has a 10-inch [in] radius. What...Ch. 7 - When shipping freight around the world, most...Ch. 7 - A body traveling in a circle experiences an...Ch. 7 - In NCAA basketball, the center circle diameter...Ch. 7 - Continental drift has an average velocity of 2...Ch. 7 - Express the following values using scientific...Ch. 7 - Express the following values using scientific...Ch. 7 - Which of the following is the longest distance? A....Ch. 7 - Which of the following is the largest volume? A....Ch. 7 - In 2001 , the first iPodTM by Apple had a rated...Ch. 7 - New plastic fuel tanks for cars can be molded to...Ch. 7 - The longest sea bridge, the Jiaozhou Bay Bridge in...Ch. 7 - The term "deep sea" refers to everything in the...Ch. 7 - Which of the following is the fastest speed? A. 50...Ch. 7 - Which of the following is the largest mass...Ch. 7 - Which of the following is the largest volumetric...Ch. 7 - If a liquid evaporates at a rate of 50 kilograms...Ch. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - One of the National Academy of Engineering Grand...Ch. 7 - The oxgang is unit of area equal to 20 acres....Ch. 7 - In an effort to modernize the United States...Ch. 7 - Old Mississippi River paddle wheelers routinely...Ch. 7 - The Units Society Empire (USE) had defined the...Ch. 7 - Prob. 21RQCh. 7 - The Units Society Empire (USE) had defined the...Ch. 7 - The Units Society Empire (USE) had defined the...Ch. 7 - The Units Society Empire (USE) had defined the...Ch. 7 - Prob. 25RQCh. 7 - Prob. 26RQCh. 7 - Prob. 27RQCh. 7 - Prob. 28RQCh. 7 - Prob. 29RQCh. 7 - Prob. 30RQCh. 7 - Prob. 31RQCh. 7 - Prob. 32RQCh. 7 - We wish to analyze the velocity of a fluid exiting...Ch. 7 - Wind energy uses large fans to extract energy from...Ch. 7 - Prob. 35RQCh. 7 - Prob. 36RQCh. 7 - Prob. 37RQCh. 7 - Prob. 38RQCh. 7 - The largest hailstone is the United States was...Ch. 7 - The largest hailstone is the United States was...Ch. 7 - How large a surface area in units of square feet...Ch. 7 - How large a surface area in units of square feet...Ch. 7 - Prob. 43RQCh. 7 - In many engineering uses, the value of "g," the...Ch. 7 - In many engineering uses, the value of "g," the...Ch. 7 - A box has a volume of 10 gallons [gal]. If two...Ch. 7 - Prob. 47RQ
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- Question2 The mission profile for a jet driven aircraft consists of the following segments: engine start and warm-up, taxi, take-off, climb to the cruise altitude of 35000 ft, descend to 10000 ft, one hour loiter at this altitude at 60% of the cruise speed, flight at loiter speed and altitude to an alternate airport (100 nm), descend to landing approach condition followed by the final landing, taxi and shutdown. The cruise Mach number is 0.8. No provisions are made for the reserved fuel or any trapped oil and fuel. The aircraft carries 200 people (including pilots and the cabin crew) at 175 lb each and 90 lb baggage each. This aircraft has a wing area of 2000 ft² a) If the landing stall speed of the aircraft is set at 100 kts corresponding to a landing weight of 0.85 Wro, and C(Lmax) Landing = 2.50, determine take-off weight and then calculate the range and empty weight of this aircraft (see Table Q2). Consider landing at sea level on a standard day. L/D at cruise L/D at 10000ft flight…arrow_forwardq Y X A ΕΙ L B Marrow_forwardIf L=3508 mm, W-9189 N, E=80 GPa, Determine the deflection at the free end of the beam. Step-1 The bend moment of the beam, M (Units: N.m), as a function of spatial coordinate X ( Units: m) can be described by Select one: O 1. M = 16117.506 +9189.000*X, for 0<=X<= L/2; M=0.00, for L/2< x <= L O 2. M = 16117506.000 - 9189.000*X, for 0<= x <= L/2; M = 9189.000* X, for L/2< x <= L O 3. M=16117.5069189.000*X, for 0<=X<= L/2; M=0.00, for L/2< x <= L O 4. M = 16117506.000 + 9189.000*X, for 0<=X<= L/2; M = 9189.000*X, for L/2arrow_forwardQuestion 1 A three-blade propeller of a diameter of 2 m has an activity factor AF of 200 and its ratio of static thrust coefficient to static torque coefficient is 10. The propeller's integrated lift coefficient is 0.3.arrow_forwardA close end tube of thin-walled circular section may be subjected to torque 7 and internal pressure P, as shown in Figure Q3. The shear stress in the wall caused by the torque can be calculated as T = T/(2πR²t), where the mean radius of the cross section is R (i.e., the radius of the centreline of the wall) and the wall thickness is t. The internal radius of the tube can be calculated as (R-t/2). However, as R>>t, you can approximately assume that the internal radius of the tube is equal to Rin the subsequent calculation. The tube is made from a material with Young's modulus E, Poisson's ratio v. Orr T t P Ozz бөө Orr Z T Ozz бед Figure Q3 Centreline of the wall R (a) If the change of the diameter cannot exceed 0.1 m under elastic deformation, calculate the minimum allowable wall thickness of the cylindrical pressure vessel if P=23.6 MPa, T=0 KN.m, R = 2 m, Young's modulus E = 246 GPa, and Poisson's ratio v = 0.21.arrow_forwardQuestion2 The mission profile for a jet driven aircraft consists of the following segments: engine start and warm-up, taxi, take-off, climb to the cruise altitude of 35000 ft, descend to 10000 ft, one hour loiter at this altitude at 60% of the cruise speed, flight at loiter speed and altitude to an alternate airport (100 nm), descend to landing approach condition followed by the final landing, taxi and shutdown. The cruise Mach number is 0.8. No provisions are made for the reserved fuel or any trapped oil and fuel. The aircraft carries 200 people (including pilots and the cabin crew) at 175 lb each and 90 lb baggage each. This aircraft has a wing area of 2000 ft² L/D at cruise L/D at 10000ft flight Table Q2 20 16 0.43 lb/hr/lb 0.50 lb/hr/lb C: Specific Fuel Consumption at cruise: C: Specific Fuel Consumption at 10000 ft flight: Weight ratios Engine Start and warm-up Taxi Take-off Climb Descent Landing, taxi and shutdown 0.992 0.996 0.996 0.996 0.992 0.992 Question 2 continues on the…arrow_forward[(a) If the change of the diameter cannot exceed 0.1 m under elastic deformation, calculate the minimum allowable wall thickness of the cylindrical pressure vessel. (P= 23.6 MPa, T=0 KN.m, R = 2 m, Young's modulus E = 246 GPa, and Poisson's ratio v = 0.21)] Step-4 The minimum allowable wall thickness of the cylindrical pressure vessel can be calculated as (Units: mm and rounded to three decimal places) Select one O 1.8.481 O 2.4.240 ○ 3.6.869 ○ 4. 16.961 5. 13.738 O 6.3.434arrow_forward[If L=3508 mm, W=9189 N, E=80 GPa, Determine the deflection at the free end of the beam.] Step -3 Which equation in the following choices most accurately represents the functional relationship between the value of the deflection v ( Units: mm) at half length (x =L/2) of the beam and the second moment of area about z-axis of the cross section, Izz ( Units: mm²): (Please note that " X = L/2" is the same as "X=L÷2".) Select one: O 1. v 588830960.433/Izz O 2. v=338836061.442/Izz O 3. v 119832265.632/Izz O 4. v 413214709.076/Izz O 5. v=287184222.808/Izz O 6. v=206607354.538/Izz O 7. v=66114353.452/Izz O 8. v 752050770.518/Izzarrow_forwardA bar of length L and of a circular cross-section of diameter D is clamped at the top end and loaded at the other (bottom) end by a point load P as shown in Figure Q2a. The cross-section of the bar is shown in Figure Q2b indicating that load is applied at the point A. The material used in the bar has specific weight y. Find the magnitude and location of the maximum normal stress in the bar. Figure Q2 a Figure Q2 b 45° A Step -1 The given load case can be represented by a statically equivalent system of the following loads Select one: O 1. A tensile force placed at the centroid with intensity equals to 0.354 P; a bending moment about zaxis, M₂ = (P×D× 0.708); a bending moment about yaxis, My= (Px D× 0.177); and self-weight of the vertical beam producing maximum tensile stress at the built-in end. ○ 2. A tensile force placed at the centroid with intensity equals to 0.354P; a bending moment about z axis, M₂ = (PxDx 0.354); a bending moment about yaxis, My= (Px D× 0.177); and self-weight…arrow_forwardQuestion 1 A three-blade propeller of a diameter of 2 m has an activity factor AF of 200 and its ratio of static thrust coefficient to static torque coefficient is 10. The propeller's integrated lift coefficient is 0.3. a) Calculate the static power and thrust coefficients.arrow_forwardA cantilever beam of a channel section and length L is loaded by a point load W applied at half-length of the beam through the centroid of the section, as shown in Figure Q1. The material of the beam is aluminum alloy with the Young's modulus of E. 1. As illustrated in Figure Q1, the Y-axis is positioned along the symmetric plane of the cross-section, while the Z-axis and X-axis pass through the centroid of the cross-section. The X-axis is defined using the right-hand rule, with the origin located at the fixed end. The distance from the centroid to the bottom of the cross- section, yc (Units: mm), is: Select one: O 1. 48.72 O 2. 70.24 ○ 3. 76.38 ○ 4. 83.12 O 5. 68.73 ○ 6. 50.26 ○ 7. 56.19 ○ 8. 88.73 ○ 9. 62.82 O 10. 42.83 W a a 25 mm y Z AN a-a 25 mm 150 mm SC yc 6 mm Figure Q 1 200 mmarrow_forwardUse the principle of virtual work to determine the vertical deflection and rotation at tip (Point B) of the cantilever shown below. (L=6847 mm, q=5331 N/mm, M = 1408549 N.mm, and El = 8.6 x 1014 N. mm²) 9 Y M A ΕΙ B Larrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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