Why are skies clear in the eye of a hurricane?
a. ?Warm air is rising.
b. ?Warm, dry air is descending.
c. ?Cold air is rising.
d. ?Cold, dry air is descending.
e. ?Any moisture is flung to the edge of the eye wall by centrifugal forces.
ANSWER: d
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Traction within a stream refers to _____. a. the total amount of load being moved b. sliding and rolling load along the stream bed
c. dissolving of rock material by the stream water d. the maximum size of load being moved by the stream e. the velocity of the stream flow
A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block in meters per second squared is
A) 1. B) 2. C) 5. D) 10. E) none of the above
Humid air is ____ than dry air because molecules of water vapor ____ than molecules of nitrogen and oxygen at the same temperature
A) ?more dense; weigh more B) ?less dense; weigh less C) ?more dense; weigh less D) ?less dense; weigh more
Collectively, the San Andreas fault system of California is a(n) ________.
A. reverse fault B. oblique fault C. right lateral strike-slip fault D. normal fault E. left lateral strike-slip fault