Levees are ____
a. less susceptible to failure when built from local materials
b. an alternative to spillways for protection of structures from floods
c. always artificial, not natural
d. sometime intentionally breached during floods
e. reinforced by piping and sand boils
ANSWER: d
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A. heat. B. contraction. C. bending. D. expansion.
Identify each of the substances in the following chemical reactions as acting as an "acid" or a "base."HSO4- + H2O ? H2SO4 + HO-
What will be an ideal response?
Satellites can detect ocean color by taking advantage of the fact that chlorophyll absorbs ________.
A. green and blue light B. blue and green light C. blue and red light D. radioactivity E. red and green light
The ____ is an internationally accepted definition for the beginning of space, at an altitude of 100 kilometers
a. tropopause b. stratopause c. ozone layer d. Kelvin scale e. Karman line