Shear, or drag, velocity can be described as:
a. wind velocity at the maximum height of sand transport
b. wind velocity at the average height of sand transport
c. wind velocity at ground surface
d. the velocity gradient above the land surface
d
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Which of the following is the name given to the radio waves produced by lightning?
A. St. Elmo's fire B. sferics C. thunder D. sonic boom
The Green Revolution refers to the introduction of higher-yielding and hardier strains of crops through advances in botanical science
Indicate whether the statement is true or false.
At a height of 10 miles, what is the density of the atmosphere when compared to sea level? [INSERT FIGURE 1-10. NO CAPTION]
A) 1% B) 10% C) 50% D) 90%
Which type of lightning is LEAST likely?
A) within the same cloud B) cloud-to-cloud C) cloud-to-Earth