Country X increases its population by 5% per year. How long will it be before its population doubles?
A) It is impossible to answer this without knowing country X's population.
B) 20 years
C) 35 years
D) 10 years
E) 14 years
E
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For an ideal inductor in an ac circuit, how much energy is stored in the inductor at the instant when the current is zero?
A. maximum B. 1?2 maximum C. 0.707 maximum D. zero
A positive ion has a deficiency of
A) electrons. B) neutrons. C) negative ions.
In the SI, weight is expressed in units of ______________
Fill in the blank(s) with correct word
An explorer walks into a lab in a science building. She has a compass in her hand and finds that the south pole of her compass points toward the room's East wall when she is nearer that wall and toward the west wall when she is nearer that wall. You could explain this if magnetized metal had been installed in the East and West walls with North poles pointing into the room. If no magnetic material
was installed in the North or South walls of the room, she would expect that a. the south pole of the compass would tend to point toward those walls. b. the north pole of the compass would tend to point toward those walls. c. the compass needle would not point in any particular direction. d. the north pole of the compass needle would tend to point toward the centers of those walls, but the south pole would tend to point toward the sides of those walls. e. the south pole of the compass needle would tend to point toward the centers of those walls, but the north pole would tend to point toward the sides of those walls.