Which of the following transmits a signal in an infrared device?
A. diffuser
B. emitter
C. detector
D. antenna
Answer: B
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List the five most important technological inventions of the early 19th century, then rank them in order of importance in facilitating the flourishing of the factory system in America. Justify your ranking.
What will be an ideal response?
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Acid core solder should be used when making wiring repairs.
Answer the following statement true (T) or false (F)
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A direct drive wind turbine operates with a rotor rotational speed of 19 RPM at full power output. Determine the number of magnetic poles required to match a grid frequency of 50 Hz.
What will be an ideal response?
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Which material would NOT be considered a good conductor?
A. copper B. aluminum C. glass D. silver
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