Essential Environment: The Science Behind the Stories (5th Edition)
5th Edition
ISBN: 9780321984579
Author: Jay H. Withgott, Matthew Laposata
Publisher: PEARSON
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Chapter 1, Problem 3CEF
To determine
The relation between average per capita income and ecological footprints also name some ways in which a wealthy society can decrease its ecological footprint.
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question 664 thank you
5. Determine an expression for vo as a function of vs in the circuit shown below.
Assume the operational amplifier is ideal
(10 pts)
162
+
+
212
10052} -j 100-52
No
13.38 Consider the attic of a home located in a hot climate.
The floor of the attic is characterized by a width of
L₁ = 8 m while the roof makes an angle of 0 = 30° from
the horizontal direction, as shown in the schematic.
The homeowner wishes to reduce the heat load to the
home by adhering bright aluminum foil (ε = 0.07) onto
the surfaces of the attic space. Prior to installation of
the foil, the surfaces are of emissivity & = 0.90.
Attic
A2, 82, T2 0 = 30°
A1, E1, T₁
土
L₁ = 8 m
(a) Consider installation on the bottom of the attic
roof only. Determine the ratio of the radiation heat
transfer after to before the installation of the foil.
(b) Determine the ratio of the radiation heat transfer
after to before installation if the foil is installed
only on the top of the attic floor.
(c) Determine the ratio of the radiation heat transfer if
the foil is installed on both the roof bottom and the
floor top.
Chapter 1 Solutions
Essential Environment: The Science Behind the Stories (5th Edition)
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