Worker bees labor very hard and live only about ____________________ weeks.
Fill in the blank(s) with the appropriate word(s).
Answer: 6
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The Iroquois Confederacy was able to menace its Native American and European neighbors because of
A. its military alliances, sustained by political and organizational skills. B. the Iroquois warriors' skill with the Europeans' muskets. C. the scattered nature of the Iroquois settlements, which made it difficult for their enemies to defeat them. D. the alliance with the Aztecs and Incas. E. its use of new weapons.
On a domestic refrigerator equipped with a defrost cycle that depends on the run time of the compressor, what terminates the defrost cycle?
A. cooling thermostat B. compressor C. door switch D. defrost timer
At about what temperature does oxygen combine with the nitrogen in the air to form NOx?
A) 500 degrees F B) 1500 degrees F C) 750 degrees F D) 2500 degrees F
Which switching device used below is also called a "magnetic pulse generator"?
A) Ignition coil B) Pickup coil C) Hall-effect switch D) Optical sensor