The speed at which current changes back and forth is referred to by three different names that all mean the same thing-cycles, frequency, or ____________________.
Fill in the blank(s) with the appropriate word(s).
hertz
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?Laser beam drilling can drill holes as small as ______________.
A. ?0.0001 in (0.0025 mm) B. ?0.01 in (0.25 mm) C. ?0.05 in (1.27 mm) D. ?1/16 in (1.58 mm)
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AC concentrates about ____ of its welding heat on the work and ____ on the tungsten.
A. 2/3, 1/3 B. 1/3, 2/3 C. 1/2, 1/2 D. 1/4, 3/4
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Gypsum plus irrigation reduces the pH of sodic soils by replacing sodium from the exchange complex and removing it from the soil
Indicate whether the statement is true or false
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Damage from frostbite can affect only the outer layer of the skin.