Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Question
Chapter 2, Problem 13P
(a)
To determine
Calculate the doubling time.
(b)
To determine
Calculate the current annual growth rate.
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The influence line for moment at B for the beam shown is
A
-6 m-
B
a. O at A, 6 at B, and 15 at C
b. 1 at A, 1 at B, and 1 at C
c. O at A, 0 at B, and -9 at C
d. O at A, 1 at B, and 1 and C
-9 m-
Consider the following figure:
H/3
Pa
Given: H = 7 m, y = 13 kN/m³, ø′ = 25°, c′ = 12 kN/m², and a = 10°. For given values, K₁ = 0.296. Calculate the Rankine active force per unit length of the wall after the occurrence of the tensile crack.
(Enter your answer to three significant figures.)
Pa
=
kN/m
Wall
movement
to left
45+ '/2
45 + 6'/2
Rotation of wall
about this point
A vertical retaining wall shown in the figure above is 7 m high with a horizontal backfill. For the backfill, assume that y = 14.5 kN/m³, ' = 26°, and c′ = 18 kN/m². Determine the Rankine active force per unit
length of the wall after the occurrence of the tensile crack.
(Enter your answer to three significant figures.)
Pa =
kN/m
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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- A composite beam is made of two brass [E=114 GPa] bars bonded to two aluminum [E = 74 GPa] bars, as shown. The beam is subjected to a bending moment of 335 N-m acting about the z axis. Using a = 5 mm, b = 30 mm, c = 10 mm, and d = 20 mm, calculate (a) the maximum bending stress in the aluminum bars. (b) the maximum bending stress in the brass bars. N Aluminum C Brass Brass Aluminum b Answers: (a) σal= (b) Obr= a a MPa MPaarrow_forwardA standard steel pipe (D = 3.500 in.; d = 3.068 in.) supports a concentrated load of P = 630 lb as shown. The span length of the cantilever beam is L = 4 ft. Determine the magnitude of the maximum horizontal shear stress in the pipe. 720 psi 761 psi 508 psi 564 psi 667 psi L Pipe cross section.arrow_forwardA beam is subjected to equal bending moments of M₂ = 59 kip-ft. The cross-sectional dimensions are b₁ = 7.5 in., d₁ = 1.4 in., b₂ = 0.55 in., d₂ = 5.0 in., b3 = 3.2 in., and d3 = 1.5 in. Determine: (a) the centroid location (measured with respect to the bottom of the cross-section), the moment of inertia about the z axis, and the controlling section modulus about the z axis. (b) the bending stress at point H. Tensile stress is positive, while compressive stress is negative. (c) the bending stress at point K. Tensile stress is positive, while compressive stress is negative. (d) the maximum bending stress produced in the cross section. Tensile stress is positive, while compressive stress is negative. M₂ Z M₂ Answer: (a) y= i Iz= in. in.4 S= i on,3 (b) σH= i ksi (c) OK = i ksi (d) σmax= ksi K b₁ d₁ H b₂ b3 d₂ d3arrow_forward
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