At 1.0 kHz, the phase angle of an RLC series circuit with a capacitive reactance of 40 ?, a resistance of 100 ?, and a certain inductor is 40°. What is the inductance in this circuit?
A) 12 mH B) 20 mH C) 120 mH D) 62 mH E) 210 mH
B
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A 0.600-mm diameter wire stretches 0.500% of its length when it is stretched with a tension of 20.0 N. What is the Young's modulus of this wire?
A) 5.66 × 1010 N/m2 B) 3.54 × 109 N/m2 C) 1.41 × 1010 N/m2 D) 6.43 × 109 N/m2 E) 2.78 × 109 N/m2
Two long parallel wires carry unequal currents in opposite directions. The ratio of the currents is 3 to 1. The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 ?T. What is the larger of the two currents?
A. 0.5 A B. 1.0 A C. 1.5 A D. 2.0 A E. 3.0 A
A 500-W device is connected to a 100-V power source. What current flows through this source?
A) 50,000 A B) 200. mA C) 5.00 A D) 20.0 A E) 1.60 × 1018 electrons/s
Brown (155) reports that much toxic material is illegally dumped
Violators have loosened tank-truck valves and dumped contaminants along the road (a New York company spilled out polychlorinated biphenyls—PCBs—from a truck onto 270 mi of North Carolina highway). What are the attitudes of company officials that could tolerate this atrocity? Is indiscriminate dumping a national pastime? Where do you dispose of trash and garbage on long car trips?