In each element of a series LRC circuit
A) the currents are not in phase.
B) the currents and voltages are not in phase.
C) the voltages are in phase.
D) the currents are in phase.
E) the currents and voltages are in phase.
D
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Which of the following is true of the star clusters in the Milky Way?
A) Open clusters are widely scattered in the Milky Way. B) Globular clusters are concentrated along the disk of the Milky Way. C) Open clusters are more common toward the constellation Sagittarius. D) Globular clusters are much too far away to have measureable parallaxes.
A beam of light, traveling in air, strikes a plate of transparent material at an angle of incidence of 56°. It is observed that the reflected and refracted beams form an angle of 90°. What is the index of refraction of this material?
A) n = 1.43 B) n = 1.53 C) n = 1.40 D) n = 1.48 E) n = 1.44
A car traveling at constant speed
A. travels more distance in a second the longer the car travels. B. cannot be going uphill. C. can change direction. D. does not turn.
If a monochromatic light beam with quantum energy value of 4.0 eV is incident upon a photocell where the work function of the target metal is 1.60 eV, what is the maximum kinetic energy of ejected electrons?
a. 4.6 eV c. 2.4 eV b. 4.8 eV d. 1.4 eV