Besides Earth, which of the terrestrial planets and/or satellites of terrestrial planets show(s) evidence for the possible existence of liquid water flowing on its surface in the past?
a. Venus
b. The Moon
c. Phobos
d. Mars
e. None of the terrestrial planets or satellites show such evidence.
D
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An excited atom decays to its ground state and emits a photon of green light. If instead the decay is to an intermediate state, then the light emitted could be
A) red. B) violet. C) blue. D) any of the above E) none of the above
A catenary in nature is evident in
A) eggs. B) a necklace drooping between your fingers. C) the domes of some modern buildings. D) all of the above
Sonic Booms: As a supersonic airplane increases its speed more and more, the half-angle of the conical shock wave
A. increases. B. decreases. C. is not affected.
Which of the following did the planetary model of the atom fail to explain?
A. the relationship between orbital radius and energy B. why alpha particles in Rutherford’s experiment deflected at high angles when incident on atomic foils C. why most alpha particles in Rutherford’s experiment passed with little deflection through atomic foils D. why electrons in atoms don’t radiate all their energy away rapidly