A 60.0-Hz AC generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 ? and C = 300 ?F. The impedance is
A. 4.68 ?.
B. 8.84 ?.
C. 10.0 ?.
D. 13.4 ?.
E. 18.8 ?.
Answer: D
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A 25-kg piece of equipment can be hung by steel wires of length 1.00 m, 2.00 m, or 3.00 m. If all the wires have the same diameter, which one will stretch the greatest percent?
A) the 3.00-m wire B) the 1.00-m wire C) the 2.00-m wire D) They will all stretch by the same percent.
The time between the vernal equinox and the autumnal equinox is somewhat greater than the time between the autumnal equinox and the vernal equinox. This is a result of Kepler's ________ law.
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Three resistors connected in parallel have the individual voltages labeled ?V1, ?V2 and ?V3, respectively. Which of the following expresses the total voltage ?VT across the three resistors when connected in this manner?
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A concave mirror has a radius of 2.0 m. What is the refractive power of a lens of the same focal length as the mirror?
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