A particle of charge +2q is placed at the origin and particle of charge -q is placed on the x-axis at x = 2a. Where on the x-axis can a third positive charge be placed so that the net electric force on it is zero?
A) 3.4a
B) 6.8a
C) 8.6a
D) 9.3a
E) 1.0a
B
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For a conductor in electrostatic equilibrium, which of the following statements is NOT true?
A. the electric field inside the conductor is zero B. the charge distributes itself uniformly throughout the conductor C. the electric field at the surface of the conductor is perpendicular to the surface of the conductor D. the greatest concentrations of charge on the surface are in the regions of highest curvature E. more than one of these statements about a conductor in electrostatic equilibrium is false
Kepler's Impact: In four years of operation, the Kepler satellite discovered nearly three times as many extrasolar planet candidates as had been discovered in the previous 15 years (since the first discovery of an extrasolar planet)
Discuss how these observations changed our understanding of the population of planets and of planet formation.
Which of the following is(are) drawbacks to the use of methane hydrate as a fuel?
a. When melted, it produces methane, a greenhouse gas. b. It is difficult to mine as a solid located at the bottom of the oceans. c. It is mixed with water. d. All of these are drawbacks associated with methane hydrate.
Significant Figures: How many significant figures are in the number 0.010?
A. four B. three C. two D. one