Which of these is not a form of solar energy?
A) wind energy
B) fossil fuel energy
C) geothermal energy
D) hydroelectric power
Answer: C
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To what types of electrically charged objects does Coulomb's law apply?
A) only pointlike particles B) any symmetric objects C) it applies to all such objects D) only pointlike particles and objects that can be treated as particles E) it applies to all such objects as long as they are not moving
A 0.50-m long solenoid consists of 1 000 turns of copper wire wound with a 4.0 cm radius. When the current in the solenoid is 18 A, the magnetic field at a point 1.0 cm from the central axis of the solenoid is
a. 0.090 mT. b. 0.36 mT. c. 23 mT. d. 36 mT. e. 45 mT.
In 1974, a radio message was sent out from the Arecibo observatory in Puerto Rico. How far has it gotten, approximately?
A) just beyond our Solar System B) not even to the nearest stars C) just a miniscule fraction of the distance across the Milky Way D) almost to the center of the Milky Way E) beyond the Milky Way, to the Andromeda galaxy
What scientist discovered more elements than any other person?
a. Lavoisier b. Boyle c. Berzelius d. Davy