An LRC ac circuit has a reactance (due to its capacitance) of 17 k?, a reactance (due to its inductance) of 9.0 k?, and a resistance of 28 k?. What is the power factor of the circuit?
A) 0.96
B) 0.28
C) 1.04
D) 0.48
A
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At the lowest point in a vertical dive (radius = 0.58 km), an airplane has a speed of 300 km/h which is not changing. Determine the magnitude of the acceleration of the pilot at this lowest point.
A. 26 m/s2 B. 21 m/s2 C. 16 m/s2 D. 12 m/s2 E. 8.8 m/s2
You look at yourself in a plane mirror. If you move away from the mirror and look at yourself again, you now see
a. more of yourself. b. less of yourself. c. the same amount of yourself. d. a larger image of yourself. e. a smaller image of yourself.
Energy in Nuclear Reactions: A nuclear explosion results in a mass decrease of 2.10 g. How much energy is released during this explosion? (c = 3.00 × 108 m/s)
A. 1.89 × 1014 J B. 6.30 × 105 J C. 1.89 × 1013 J D. 2.25 × 1012 J
Water flows into a swimming pool at the rate of 12 gal/min. The pool is 16 ft wide, 32 ft long and 6.0 ft deep. How long does it take to fill? (1 U.S. gallon = 231 cubic inches)
a. 32 hours c. 48 hours b. 64 hours d. 24 hours