A certain unsharpened cylindrical pencil is inch in diameter and 10 inches long. What is the pencil’s surface area?
a. 2 in^2
b. 4 in^2
c. 6 in^2
d. 8 in^2
d. 8 in^2
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Where is the lamp located when silhouette lighting is desired?
a. in front of the plant c. above the plant b. behind the plant d. under the plant
The old standard for volume of air to be removed per minute in an active summer cooling system was 8 cfm per square foot of floor before any corrections were made for elevation, fan-to-pad temperature rise, and interior light intensity. This is often used today in very cool climates. What is a better volume of air removal for greenhouses in warm climates?
What will be an ideal response?
A standard measurement of hardness is the ____________________ hardness test.
Fill in the blank(s) with the appropriate word(s).
____________________ is the standard metric expression for pressure.
Fill in the blank(s) with the appropriate word(s).