Impedance: The impedance of an RC circuit with a 200-? resistor s 1060 ?. If the frequency of the applied ac voltage is 20.0 Hz, what is the capacitance of the capacitor?
A. 6.64 ?F
B. 7.64 ?F
C. 8.64 ?F
D. 9.64 ?F
E. 200 ?F
Answer: B
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Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (?2, ?2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
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What is the equivalent resistance between points a and b when R = 13 ??
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