The size of many nails is determined by the penny system. This method determines the size of nails by their ____.

A. shank size
B. length
C. weight
D. all the above


Answer: B

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Coal is rock formed from plants in dry areas

Indicate whether the statement is true or false

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During telophase, the walls of plant cells form a cleavage furrow

Indicate whether the statement is true or false

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The following is the reduced form of the essential element depicted

A) Fe3+ B) NH4+ C) CO2 D) Mn4+ E) SO42-

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A common cause of poor airflow is

A) unusually large ductwork B) improper installation of the thermostatic expansion valve C) a duct system that has been sealed too tight and cannot breathe D) unusual airflow restrictions in the duct

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