Why does the air's relative humidity affect comfort?

A) Water molecules in the air act as thermal insulators.
B) The relative humidity affects how rapidly perspiration can evaporate.
C) Human comfort is not affected by the relative humidity.
D) Water molecules in the air act as thermal conductors.


B

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A. It ensures worker safety. B. It ensures limited fines. C. It ensures permits are followed explicitly. D. All of the above

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When multiplying signed numbers if there is an odd number of negative signs, the product is negative.

Answer the following statement true (T) or false (F)

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A molecular sieve desiccant dryer is used _____________________________

A. in a DDC system to keep the computer chips from developing static charges B. to control bacteria in cooling towers C. to remove moisture from compressed air used in pneumatic controls D. to remove CO? from boiler stack gas

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For a common-emitter amplifier, the input and output voltages are

A) in phase B) 45° out of phase C) 180° out of phase D) 90° out of phase

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