Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a
A) north pole.
B) south pole.
C) either of these
D) neither of these
D) neither of these
Answer: A
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Interstellar gas clouds may collapse to form stars if they
a. have very high temperatures. b. encounter a shock wave. c. rotate rapidly. d. are located near main sequence spectral type K and M stars. e. all of the above.
The Sun is located at the center of Earth's elliptical orbit.
Answer the following statement true (T) or false (F)
Which of the following planets cannot be in opposition?
a. Mercury b. Jupiter c. Saturn d. Mars
A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?
a. 20 m/s2 b. 18 m/s2 c. 13 m/s2 d. 15 m/s2 e. 24 m/s2