A 200-? resistor, a 25-mH inductor, and a capacitor are connected in series across an ac voltage source at 1000 Hz. If the impedance of this circuit is 240 ?, what is the value of the capacitor?
A) 5.5 ?F
B) 3.2 ?F
C) 4.2 ?F
D) 6.5 ?F
E) 7.5 ?F
D
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An electron is released form rest in a region of space where a uniform electric field is present. Joanna claims that its kinetic and potential energies both increase as it moves from its initial position to its final position. Sonya claims that they both decrease. Which one, if either, is correct?
A. Joanna, because the electron moves opposite to the direction of the field. B. Sonya, because the electron moves opposite to the direction of the field. C. Joanna, because the electron moves in the direction of the field. D. Sonya, because the electron moves in the direction of the field. E. Neither, because the kinetic energy increases while the electron moves to a point at a higher potential.
If the interaction of a particle with its environment restricts the particle to a finite region of space, the result is the quantization of ____ of the particle
a. the momentum b. the energy c. the velocity d. all of the above properties e. only properties (a) and (b)
Power: A 100-W driveway light bulb is on 10 hours per day. If the power company charges 10ยข for each kilowatt-hour of electricity used, estimate the yearly cost to operate the bulb if it is used every day for a 365-day year.
A. $3.65 B. $7.30 C. $37 D. $73
The most striking "cloudmark" in Jupiter's atmosphere is the:
A) Great Dark Spot. B) Cassini Division. C) Great Red Spot. D) Black Hole. E) Brown Dwarf.