Which of the following is a serious hazard to aircraft?
a. molecular viscosity
b. laminar flow
c. clear-air turbulence
d. long waves in the westerlies
e. none of these
Ans: c. clear-air turbulence
Environmental & Atmospheric Sciences
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Indicate whether the statement is true or false.
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The relatively young mountains along the western margins of North and South American plates are referred to as the
A) Cordilleran system. B) Eurasian-Himalayan system. C) Alleghany orogeny. D) Sierra Nevadan orogeny.
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High clouds that form delicate veil-like patches or extended wispy fibers are termed
________. A) cirrus B) stratus C) cumulus D) alto
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