A two-branch parallel circuit has a 30 ? and a 15 ? resistor. What is the total resistance?
A. 2 ?
B. 10 ?
C. 45 ?
D. 15 ?
Answer: B
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?The breaking of chemical bonds by ____ is the cause for degradation of plastics.
A. ?pyrolysis B. ?oxidation C. ?hydrolysis D. ?destabilization
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To better spread the load supported by a caisson, the bottom of the caisson hole may be widened by a process called _____.
a. tapering b. belling c. bailing d. reaming
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What part of the plant produces the pollen?
a. Pistil c. Stamen b. Anther d. Stigma
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What were the first beam sections or shapes rolled in America?
What will be an ideal response?
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