A thin, circular disk of radius 30.0 cm is oriented in the yz-plane with its center at the origin. The disk carries a total charge of +3.00 ?C distributed uniformly over its surface
Calculate the magnitude of the electric field due to the disk at the point x = 15.0 cm along the x-axis. (?0 = 8.85 × 10-12 C2/N ? m2) A) 9.95 × 105 N/C
B) 4.98 × 105 N/C
C) 3.31 × 105 N/C
D) 2.49 × 105 N/C
E) 1.99 × 105 N/C
C
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If the potential difference across a capacitor is doubled, what happens to the energy stored?
1.It becomes four times larger. 2.It becomes two times larger. 3.It is unchanged. 4.It becomes one-half as large. 5.It becomes one-fourth as large.
Put the following stages of planet formation in order of occurrence.
What will be an ideal response?
Quasar ________ lines are an indication of intervening cooler gas
Fill in the blank(s) with correct word
Energy Conservation With Nonconservative Forces: A heavy sled and a light sled, both moving horizontally with the same kinetic energy, suddenly slide onto a rough patch of snow and eventually come to a stop. The coefficient of kinetic friction between the sleds and the rough snow is the same for both of them. Which of the following statements about these sleds are correct? (There could be more than one correct choice.)
A. Both sleds will slide the same distance on the rough snow before stopping. B. The heavy sled will slide farther on the rough snow than the light sled. C. The light sled will slide farther on the rough snow than the heavy sled. D. On the rough snow, the change in kinetic energy will be the same for both sleds. E. The friction from the snow will do the same amount of work on both sleds.