Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Textbook Question
Chapter 2, Problem 7P
The population of a state is 25,600 in the year 1800 and 218,900 in the year 1900. Calculate the expected population in the year 2000 if (a) the growth is linear and (b) the growth is exponential.
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Consider the structure shown in (Figure 1). Suppose that
F = 2500 N.
Figure
0.2 m
1500 N
0.2 m
30%
0.2 m
B
-0.2 m-0.2 m-
F
Part A
Determine the resultant couple moment.
Express your answer to three significant figures and include the appropriate units. Enter positive value if the moment is
counterclockwise and negative value if the moment is clockwise.
ΜΑ
?
1 of 1
MR = 2.85
kN⚫m
√30°
1500 N
AUG
16
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A
W
20
Aa
Example
The 30-N force P is applied perpendicular to the
portion BC of the bent bar. Determine the moment
of P about point B and about point A.
Ans: Mb= 48 N.m
Ma= 81.941 N.m
P = 30 N
1.6 m
45°
B
1.6 m
Q2. Write the flexibility matrix corresponding to coordinates 1 and 2 for the structures shown.
13
ans:
l
4 11
3 [16 51
6EI 126EI 5 2
(a)
A
-1-
2
(b)
A
B
Constant EI
2
Chapter 2 Solutions
Sustainable Energy
Ch. 2 - A quantity has a doubling time of 110 years....Ch. 2 - The population of a particular country has a...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - The total world population in 2012 was about 7...Ch. 2 - The population of a state is 25,600 in the year...Ch. 2 - The population of a country as a function of time...Ch. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Prob. 11P
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