An AC series circuit has 18.9-? resistance, 21.1-? inductive reactance, and 15.5-? capacitive reactance. If an effective (rms) emf of 94 V is applied, what is the power output?

a. 2.34E+2 W
b. 1.60E+2 W
c. 4.66E+2 W
d. 4.30E+2 W
e. 2.32E+2 W

d

Physics & Space Science

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The Higgs field is best described as a field that

a. explains why stable matter appears to be composed of fermions. b. particles interact with to acquire mass. c. governs the electroweak interaction. d. carries the strong force, carried by gluons. e. has been verified experimentally by many accelerators.

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Which of the following statements is true of stars?

A) They are highly unbalanced. B) They are held together by their own gravity. C) They do not have their own source of energy. D) They defy the law of conservation of mass.

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A mass is connected by a light string that passes over a pulley of mass M to a mass sliding on a frictionless horizontal surface as shown in the figure. There is no slippage between the string and the pulley. The pulley has a radius of 25.0 cm and a moment of inertia of 1?2 If is 4.00 kg, is 4.00 kg, and M is 4.00 kg, then what is the acceleration of

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A. 4.42
B. 3.92
C. 3.42
D. 3.04
E. 2.96

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When someone on Earth observes the Moon in the first-quarter phase, someone on the Moon facing Earth observes Earth in the

A) crescent Earth phase. B) third-quarter Earth phase. C) new Earth phase. D) first-quarter Earth phase. E) full Earth phase.

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