Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Textbook Question
Chapter 5, Problem 5P
What are the decay products of the β– decay of the following nuclides:
3H, 14C, 64Cu, and 125Sn?
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A 13.0 ft high vertical wall retains an overconsolidated soil where OCR = 1.5, c' = 0, and '
magnitude and the location of the horizontal load on the wall, assuming the at-rest condition. Use Ysat
(Enter your answers to three significant figures.)
33°. If the entire soil behind the wall is submerged with the water level at the ground surface, determine the
127 lb/ft³.
Activity Frame
P₁ =
lb/ft
Height above the bottom of the wall =
O Icon Kov
ft
=
A 5 m high smooth vertical wall retains a clay backfill with c = 13 kN/m², ' -25°, and y = 17.0 kN/m³. The clay is in active state.
a. Determine the maximum tensile stress within the clay.
(Enter your answer to three significant figures.)
σα
=
kN/m²
b. Determine the depth of the tensile cracks.
(Enter your answer to three significant figures.)
Zo
=
m
c. Determine the magnitude and location of the active thrust, neglecting the tensile zone.
(Enter your answers to three significant figures.)
Pa
x =
=
kN/m²
m
A composite beam is fabricated by bolting two 3.1-in.-wide by 14-in.-deep timber planks to the sides of a 0.4-in. by 14-in. steel plate.
The moduli of elasticity of the timber and the steel are 1940 ksi and 30300 ksi, respectively. The simply supported beam spans a
distance of 21 ft and carries two concentrated loads P, which are applied as shown. Assume LAB = LCD = 5 ft, Lgc = 11 ft, b = 3.1 in., d = 14
in. and t = 0.4 in.
(a) Determine the maximum bending stresses σ,, σ, produced in the timber planks and the steel plate if P = 2.1 kips.
(b) Assume that the allowable bending stresses of the timber and the steel are 830 psi and 24900 psi, respectively. Determine the
largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.)
LAB
B
Answers:
LCD
LBC
b
Cross section
D
ksi, σ, =
i
ksi.
(a) σ,
=
(b) P= i
i
kips.
Chapter 5 Solutions
Sustainable Energy
Ch. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - A sample of 137Cs (half-life = 30.1 years) decays...Ch. 5 - Prob. 4PCh. 5 - What are the decay products of the decay of the...Ch. 5 - Prob. 6PCh. 5 - Nuclide A has a half-life of 4 days, and nuclide B...Ch. 5 - 64Cu can decay by both decay and + decay. Draw an...Ch. 5 - At time t = 0 a sample contains 3.57 108 nuclei...Ch. 5 - Prob. 10P
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