A closed circuit is a completed path for the flow of electricity starting from a source and returning to the source.

True

False


The answer to this question is true. If the circuit is not closed (in other words opened), the flow of electricity never returns to the source.

Answer: True

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Repeat Problem P13.20 for a 56 m long airplane, whose cross-section is represented as shown in Figure 14.24.

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Which of the following could cause ineffective synthesis of calcitriol?

A) increased levels of thymosins B) decreased availability of vitamin D3 C) increased levels of MSH D) increased levels of gonadotropins E) inability to produce sufficient amounts of erythropoietin

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What component pulses the fuel injector on most vehicles?

A) Electronic control unit (computer) B) Ignition module C) Crankshaft sensor D) Both B and C

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Lack of secondary air or a stopped up vent will cause:

A) The high limit to open. B) Flame rollout. C) Higher-than-normal temperature rise. D) Delayed ignition.

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