Earthquake damage occurs when
A) stress exceeds strain of materials.
B) stress exceeds strength of materials.
C) strain exceeds strength of materials.
D) strength exceeds strain of materials.
Answer: B
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In the late 1970s, the United States banned the non-essential use of chlorofluorocarbons (CFCs). Why?
A) CFCs are a primary component of photochemical smog. B) CFCs are toxic gases. C) CFCs reduce the ozone concentration in the stratosphere. D) CFCs react with water vapor to form acid rain.
Distinguish between laminar and turbulent flow
What will be an ideal response?
What units of measure would most likely be represented by letters A-E on the bottom of the accompanying hydrograph?
A. hours B. miles C. kilograms D. meters
The first national park in the world was ________.
- Yellowstone - Glacier National Park - Grand Canyon - Death Valley - Yosemite