In order to prevent a duct-mounted electric heater from being energized when the fan is not on, a(n) ____________________ should be used.

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


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In the SI system, what is the prefix corresponding to ten times the base unit?

A. deka B. hecto C. kilo D. mega

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Worldwide, about ____ breeds of horses exist.

A. 200 B. 300 C. 400 D. 500

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What is torque?

What will be an ideal response?

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There are two areas into which the properties of matter can be divided:

A) Pressures above and below atmospheric pressure. B) Specific gravity and specific volume. C) Physical and chemical. D) Temperatures above and below 70°F.

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