The asteroid belt is found between which two planets' orbits?
a. Earth and Mars
b. Mars and Jupiter
c. Jupiter and Saturn
d. Venus and Earth
B
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In a resonating pipe which is open at one end and closed at the other, there
A) are displacement nodes at each end. B) are displacement antinodes at each end. C) is a displacement node at the open end and a displacement antinode at the closed end. D) is a displacement node at the closed end and a displacement antinode at the open end.
An AC generator consists of 6 turns of wire. Each turn has an area of 0.040 m2 . The loop rotates in a uniform field (B = 0.20 T) at a constant frequency of 50 Hz. What is the maximum induced emf?
a. 13 V b. 2.4 V c. 3.0 V d. 15 V e. 4.8 V
A transformer for a laptop computer converts a 120-V input to a 24-V output. Compared with the number of turns on the primary coil, the secondary has
A) 1/5 as many turns. B) 5 times as many turns. C) the same number of turns. D) none of the above
A teaspoonful of neutron star material on Earth would weigh
A) about the same as a teaspoonful of Earth-like material. B) a few tons. C) more than Mt. Everest. D) more than the Moon. E) more than Earth.