DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 20, Problem 6RQ
What types of polymers are most commonly blow molded?
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The crash cushion for a highway barrier consists of a
nest of barrels filled with an impact-absorbing material.
The barrier stopping force is measured versus the vehicle
penetration into the barrier. (Figure 1)
Part A
P Course Home
b My Questions | bartleby
Review
Determine the distance a car having a weight of 4000 lb will penetrate the barrier if it is originally traveling at 55 ft/s when it
strikes the first barrel.
Express your answer to three significant figures and include the appropriate units.
Figure
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36
μΑ
S =
Value
Units
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Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 12 MPa, and the
condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s.
Determine:
(a) the net power developed, in kW.
(b) the rate of heat transfer to the steam passing through the boiler, in kW.
(c) the percent thermal efficiency.
(d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature
increase of 18°C with negligible pressure change in passing through the condenser.
4. The figure below shows a bent pipe with the external loading FA
228 lb, and M₁ = M₂ = 1 kip-ft. The force Fernal loading FA = 300 lb, FB:
parallel to the y-axis, and
and yc = 60°.
= 125 lb, Fc
=
acts parallel to the x-z plane, the force FB acts
Cartesian resultan Coordinate direction angles of Fc are ac = 120°, ẞc = 45°,
a. Compute the resultant force vector of the given external loading and express it in
EST
form.
b. Compute the resultant moment vector of the given external loading about the origin, O,
and express it in Cartesian vector form. Use the vector method while computing the
moments of forces.
c. Compute the resultant moment vector of the given external loading about the line OA
and express it in Cartesian vector form.
:00 PM EST
k
ghoufran@buffaternal du
2 ft
M₁
A
40°
FA
M2
C
18 in
1 ft
Fc
25
houfran@bald.edu - Feb 19,
3 ft
FB
Chapter 20 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 20 - Why are the fabrication processes applied to...Ch. 20 - How does the fabrication of a shaped product from...Ch. 20 - What are some of the methods used to shape...Ch. 20 - What are some of the ways that plastic sheet,...Ch. 20 - Prob. 5RQCh. 20 - What types of polymers are most commonly blow...Ch. 20 - What are some common blow molded products, in...Ch. 20 - Why do blow molding molds typically contain a...Ch. 20 - Prob. 9RQCh. 20 - Prob. 10RQ
Ch. 20 - Prob. 11RQCh. 20 - Prob. 12RQCh. 20 - Prob. 13RQCh. 20 - Prob. 14RQCh. 20 - Prob. 15RQCh. 20 - What are some of the benefits of a hot runner...Ch. 20 - Why is the cycle time for the injection molding of...Ch. 20 - Prob. 18RQCh. 20 - Prob. 19RQCh. 20 - What are some of the ways by which a polymer...Ch. 20 - Prob. 21RQCh. 20 - How can the extrusion process be used to produce...Ch. 20 - Prob. 23RQCh. 20 - Prob. 24RQCh. 20 - Prob. 25RQCh. 20 - What is the difference between open-cell and...Ch. 20 - Prob. 27RQCh. 20 - What types of products are produced by...Ch. 20 - Prob. 29RQCh. 20 - What are some of the general properties of...Ch. 20 - What are some of the attractive features of laser...Ch. 20 - What property of plastics is responsible for...Ch. 20 - Prob. 33RQCh. 20 - Prob. 34RQCh. 20 - Prob. 35RQCh. 20 - Prob. 36RQCh. 20 - Prob. 37RQCh. 20 - Prob. 38RQCh. 20 - Why might threaded inserts be preferred over other...Ch. 20 - What are some of the ways in which metal inserts...Ch. 20 - Prob. 41RQCh. 20 - Why does locating a parting line on a sharp corner...Ch. 20 - Prob. 43RQCh. 20 - Prob. 44RQCh. 20 - Prob. 45RQCh. 20 - What property changes occur during vulcanization?Ch. 20 - Prob. 47RQCh. 20 - Prob. 48RQCh. 20 - How are glass fibers produced?Ch. 20 - Prob. 50RQCh. 20 - Prob. 51RQCh. 20 - What are glass-ceramics? How are they produced?Ch. 20 - Prob. 53RQCh. 20 - Describe the differences between the injection...Ch. 20 - Prob. 55RQCh. 20 - What is the difference between slip casting and...Ch. 20 - Prob. 57RQCh. 20 - Prob. 58RQCh. 20 - How does cementation differ from sintering?Ch. 20 - What are the benefits and limitations of machining...Ch. 20 - Prob. 61RQCh. 20 - Why are joining operations usually avoided when...Ch. 20 - Prob. 63RQCh. 20 - Discuss some of the design guidelines that relate...Ch. 20 - Prob. 65RQCh. 20 - Why are the processes used to fabricate...Ch. 20 - How are metals and ceramics combined in the...Ch. 20 - What are some of the processes that can be used to...Ch. 20 - What conditions might be attractive for...Ch. 20 - Prob. 70RQCh. 20 - Prob. 71RQCh. 20 - Prob. 72RQCh. 20 - Prob. 73RQCh. 20 - What are some of the ways that liquefied matrix...Ch. 20 - Prob. 75RQCh. 20 - Prob. 76RQCh. 20 - Prob. 77RQCh. 20 - In what way is pultrusion similar to wire drawing?Ch. 20 - Prob. 79RQCh. 20 - What are some typical products that are made by...Ch. 20 - Prob. 81RQCh. 20 - Prob. 82RQCh. 20 - Prob. 83RQCh. 20 - Prob. 84RQCh. 20 - Prob. 85RQCh. 20 - Prob. 86RQCh. 20 - What is the difference between reaction injection...Ch. 20 - Prob. 88RQCh. 20 - Prob. 89RQCh. 20 - What is a common property objective in...Ch. 20 - Prob. 91RQCh. 20 - Prob. 92RQCh. 20 - Prob. 93RQCh. 20 - What is the major concern when considering the...Ch. 20 - Prob. 95RQCh. 20 - Prob. 1PCh. 20 - Figure 20.A depicts the handles of two large...Ch. 20 - Tires are the dominant product of the rubber...Ch. 20 - Prob. 4PCh. 20 - Prob. 6PCh. 20 - Prob. 8PCh. 20 - Prob. 1CSCh. 20 - For plastic (high-density polyethylene)...Ch. 20 - What might be the pros and cons of weldable...Ch. 20 - Prob. 5CSCh. 20 - Prob. 6CSCh. 20 - Prob. 7CSCh. 20 - Crashworthiness is an important safety...Ch. 20 - Prob. 9CSCh. 20 - Prob. 10CSCh. 20 - Prob. 11CS
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