To bring a negative charge from an infinitely great distance away into the presence of a positive charge would require a ________ amount of work to be done.
A. positive
B. zero
C. negative
Answer: C
You might also like to view...
A uniform meter stick is pivoted to rotate about a horizontal axis through the 25-cm mark on the stick. The stick is released from rest in a horizontal position. The moment of inertia of a uniform rod about an axis perpendicular to the rod and through the center of mass of the rod is given by (1/12)ML2 . Determine the magnitude of the initial angular acceleration of the stick
a. 17 rad/s2 b. 13 rad/s2 c. 15 rad/s2 d. 19 rad/s2 e. 23 rad/s2
What are the advantages in placing the James Webb Space Telescope so far from Earth? Choose all that apply.
A.It will be closer to the objects it seeks to observe. B.There will not be any atmospheric interference. C.Light from the objects it observes will arrive at the telescope more quickly. D.Only a small portion of the sky will be blocked by Earth. E.It is unlikely to be hit by orbiting debris.
Which of the following particles is made of two smaller particles?
a. electron c. photon b. proton d. None of these choices.
A star can be a supernova
A) in predictable cycles of decades. B) a few times, at unpredictable intervals. C) only if it can fuse iron in its core. D) before it reaches the main sequence, if it is massive enough. E) only once.