If three 4.7 k? resistors are connected in parallel across a 12 V source, what is the value of PT?
A) 14.1 mW B) 141 mW C) 91.9 mW D) 1.41 W
C
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Low-carbon (mild) steel is
A) a plastic material. B) an elastic-plastic material. C) an elastic material. D) none of the above.
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The bony fish appeared in the Ordovician period and became abundant during the _____ period
A) Devonian B) Triassic C) Jurassic D) Cretaceous
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39. During the Franco-Prussian War, French leaders abandoned Paris and retreated to which southwestern city, leaving Parisians largely undefended?
a. Lyon b. Marseilles c. Tours d. Nancy
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Grafting is used to _____
A) topwork a large tree B) insert a different variety on part of the limbs of a tree for cross-pollination C) propagate plants that may be difficult to bud D) all of the above
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