A metal sphere of radius 2.0 cm carries a charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere?
A) 4.2 × 106 N/C
B) 5.7 × 106 N/C
C) 6.4 × 106 N/C
D) 7.5 × 106 N/C
E) 9.3 × 106 N/C
D
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______ navigation provides navigation within an area of the website.
A. Primary B. Subsidiary C. Contextual D. Adaptive
A current in a long, straight wire produces a magnetic field. The magnetic field lines:
a. go out from the wire to infinity. b. come in from infinity to the wire. c. form circles that pass through the wire. d. form circles that go around the wire.
Which statement about planetary rings is not true?
A) Saturn's rings formed along with its moons 4.6 billion years ago. B) All four jovian planets have rings. C) Individual ring particles orbit their planet in accord with Kepler's laws, so that particles closer in orbit faster than particles farther out. D) Rings are always located closer to a planet's surface than any large moons.
"North America and Europe are in the midst of a large-scale experiment. Sulfuric and nitric acids have acidified soils, lakes, and streams, thereby stressing or killing terrestrial and aquatic biota."(365) Assess this statement
What is meant by the word "experiment" here?