A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, what is the value of N?
A) 860.0
B) 1591
C) 2318
D) 3183
E) 1218
E
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When a metamorphic rock is eroded and then becomes deposited at the bottom of an ocean it turns into
A) a meteorite B) an igneous rock C) a sedimentary rock D) another metamorphic rock
What is the Kuiper belt?
A. a halo of light seen around some bright comets B. a region beyond Neptune in which a large number of small icy objects orbit C. streaks seen in the tails of some comets D. a prize given to the person who discovers the most asteroids in a given year E. a ring around Jupiter in which comets are captured
Refer to the sketch above of an H-R diagram for a star cluster. Which statement about this cluster is true?
A) It is probably located in the disk of the galaxy. B) It contains some stars that will soon undergo supernova explosions. C) It is probably located in a globular cluster. D) It is probably embedded in a molecular cloud in which new stars are being born.
A rock held above the ground has potential energy. As the rock falls, this potential energy is converted to kinetic energy. Finally, the rock hits the ground and stays there. What has happened to the energy?
A) It is transformed back into gravitational potential energy. B) The energy goes into the ground, and as a result, the orbit of the Earth about the Sun is slightly changed. C) The energy goes to producing sound and to heating the ground, rock, and surrounding air. D) The rock keeps the energy inside it in the form of mass-energy.