A mosquito flying at 2 m/s encounters a 2-m/s breeze blowing in the same direction, giving it a resulting speed over the ground of
A. 0 m/s.
B. 4 m/s.
C. 6 m/s.
D. 2 m/s.
Answer: B
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A) by faulting B) by rivers during the ice age C) because of a plate plunging into the mantle D) none of these
What is the base level of a stream?
A) the elevation along a smooth concave-up profile B) the elevation at its lowest point C) the elevation at the headwaters D) the elevation where it touches the bedrock
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A) transferring electrons from an inner level B) sharing electrons with another atom C) transferring electrons to another atom D) gaining extra electrons from another atom
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A. As temperature goes down, the solubility goes down. B. As temperature goes up, the solubility stays the same. C. As temperature goes down, the solubility goes up. D. As temperature goes up, the solubility goes up. E. both A and B