The figure below shows a layer of relatively fast-moving air overlying a layer of more slowly moving air. Where do eddies and turbulent air motions likely form?
?
A. in the bottom layer
B. in the top layer
C. in the boundary between the two layers
Answer: C
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The speed of a projectile that covers a horizontal distance of 4000 m in the time it takes for it to fall 5 m vertically is
A. about 4000 m/s. B. more than 4000 m/s. C. less than 4000 m/s. D. no way to say.
Coal is still an important fuel in the United States, mainly used for producing electricity today
Indicate whether this statement is true or false.
Mainline environmental organizations have been criticized for being too quick to compromise.
Answer the following statement true (T) or false (F)
Which chemicals make plastics more flexible and are found in a variety of products, such as detergents, cosmetics, body lotions, soft vinyl toys, and shower curtains?
A. carcinogens B. phthalates C. estrogens D. androgens E. BPAs