Potential of Point-Charges: Point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. What is the potential difference VA - VB? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. +203 kV
B. -203 kV
C. -22.5 kV
D. +22.5 kV
E. 0.00 kV
Answer: C
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Power: What is the power factor for a series ac circuit containing a 50-? resistor, a 10-?F capacitor, and a 0.45-H inductor, when connected to a 60-Hz power supply?
A. 0.00 B. 0.46 C. 0.79 D. 1.0
Galileo's observation of sunspots showed that ________.
A. planets moved along elliptical orbits around the Sun B. the Sun was not a flawless sphere C. the stars could change D. Earth revolved around the Sun E. None of these choices is correct.
Refer to Figure 6-11. Block A has a mass of 2.00 kg and rests on a rough table and is connected to block B, which has a mass of 3.00 kg, after passing over an ideal pulley, as shown. Block B is released from rest. The coefficient of kinetic friction between block A and the table is 0.300. What is the acceleration of the masses?
A. 6.54 m/s2 B. 3.92 m/s2 C. 4.71 m/s2 D. 0.981 m/s2 E. 5.89 m/s2
A uniform linear charge density of 4.0 nC/m is distributed along the entire x axis. Consider a spherical (radius = 5.0 cm) surface centered on the origin. Determine the electric flux through this surface
a. 68 N × m2/C b. 62 N × m2/C c. 45 N × m2/C d. 79 N × m2/C e. 23 N × m2/C