Each 2.0-m length of a long cylinder (radius = 4.0 mm) has a charge of 4.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point 5.0 mm from the axis of the cylinder?
a. 9.9 kN/C
b. 8.1 kN/C
c. 9.0 kN/C
d. 7.2 kN/C
e. 18 kN/C
D
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An uncharged metal sphere is placed on an insulating puck on a frictionless table. While being held parallel to the table, a rod with a charge q is brought close to the sphere, but does not touch it. As the rod is brought in, the sphere
a. remains at rest. b. moves toward the rod. c. moves away from the rod. d. moves perpendicular to the velocity vector of the rod. e. moves upward off the puck.
Mike applied 10 N of force over 3 m in 10 seconds. Joe applied the same force over the same distance in 1 minute. Who did more work?
a) Mike b) Joe c) both did the same work
Collisions between galaxies have little effect on the individual stars
Indicate whether the statement is true or false
In general, warm days are associated with
A) high surface pressure. B) low surface pressure. C) summer storms. D) negative change in pressure gradient.