At what frequency will a 14.0-mH coil have 14.0 ? of inductive reactance?
A) 1000 Hz
B) 505 Hz
C) 257 Hz
D) 159 Hz
D
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Kirchhoff's Rules: Kirchhoff's loop rule is a statement of
A. the law of conservation of momentum. B. the law of conservation of charge. C. the law of conservation of energy. D. the law of conservation of angular momentum. E. Newton's second law.
Which of the following is a "non-renewable" resource?
A) hydroelectric B) active solar heating C) wood D) photovoltaic electricity E) None of the above.
Why couldn't Newton determine the value of the gravitational constant?
a. The constant was too large to measure with existing instruments. b. The constant was too small to measure with existing instruments. c. If the gravitational constant were known, the mass of Earth could be calculated. d. Although Newton believed there was a constant, no one has ever discovered one. e. Although the right equipment and techniques for this measurement existed, Newton did not have access to them.
In order to produce precipitation, an air mass must rise because rising air
A) allows water droplets more time in the cloud where they can grow in size. B) produces downdrafts which increases the evaporation of droplets from the cloud. C) supports the downfall of raindrops. D) all of the above.