An electrical device that operates on the principle of magnetism is a ____.

a. motor
b. light bulb
c. receptacle
d. safety switch


a. motor

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Describe the nitrogen cycle that takes place in an aquarium

What will be an ideal response?

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What is the proper equation for current I in the circuit below 

A. Vs / 2R B. 2Vs / R C. 2R Vs D. R Vs E. Vs / R

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A BCD-to-decimal decoder has

A) 1 data input and 10 data outputs. B) 2 data inputs and 9 data outputs. C) 4 data inputs and 16 data outputs. D) 4 data inputs and 10 data outputs.

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Green homes should aim for ____ ENERGY STAR or 2009 IECC in cold climates.

A. significantly lower U-factors than B. significantly higher U-factors than C. the same U-factors as D. slightly higher U-factors than

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