Most of the carbon in your body was produced in
A) the Big Bang.
B) interstellar gas in the space between the stars.
C) red giant stars.
D) supernova explosions.
E) the solar nebula.
C) red giant stars.
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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
If the diameter of a wire increases, its resistance __________
Fill in the blank(s) with correct word
A bar magnet is falling through a loop of wire with constant velocity. The south pole enters first. As the magnet leaves the wire, the induced current (as viewed from above):
a. is clockwise. b. is counterclockwise. c. is zero. d. is along the length of the magnet.
A bar magnet is held above the center of a conducting ring in the horizontal plane. The magnet is dropped so it falls lengthwise toward the center of the ring. Will the falling magnet be attracted toward the ring or be repelled by the ring due to the magnetic interaction of the magnet and the ring?
a. It will be attracted. b. It will be repelled. c. It will be attracted only if the north end of the magnet is the leading end as it falls toward the ring. d. It will be attracted only if the south end of the magnet is the leading end as it falls toward the ring.