The most common solar thermal collectors are flat plate and evacuated tube. A third, less common type, ____ concentrating, uses U shaped troughs to concentrate sunlight on a tube that is placed on the focal line of the trough.

A. anabolic
B. parabolic
C. metabolic
D. hydrobolic


Answer: B

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Dolly the sheep was cloned from a nonembryonic cell of an adult sheep in:

a. 1886 c. 2001 b. 1996 d. 2006

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What does the acronym DFU represent?

What will be an ideal response?

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The ____________________ is responsible for performing the arithmetic and logical decisions that ultimately control the operation of the system.

Fill in the blank(s) with the appropriate word(s).

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A leveling rod marked with the ________ is used by surveyors

A) Metric system B) Engineer's scale C) Imperial system D) U. S. customary feet and inches

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