Which of the terrestrial planets does not have any craters?
A. Mercury
B. Venus
C. Mars
D. Earth
E. All of them have craters.
Answer: E
Physics & Space Science
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The natural frequency of the atoms in glass is in the
A) infrared part of the spectrum. B) visible part of the spectrum. C) ultraviolet part of the spectrum.
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The angular momentum of a body is constant if the
a. net torque is zero. b. net force is constant. c. net torque is constant. d. net force is zero.
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What is the energy of a photon with a frequency of 6.60 × 1015 Hz?
A) 27.3 eV B) 12.3 eV C) 18.1 eV D) 19.6 eV E) 6.60 eV
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The lunar surface cools after the sun sets. This is an example of
a. heat conduction b. heat convection c. heat radiation d. thermal expansion e. none of the above
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