Reverberation is a case of
A) sound interference.
B) forced vibrations.
C) re-echoed sound.
D) resonance.
E) none of the above
Answer: C
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After the New Horizons flyby, scientists concluded that Pluto has probably been geologically active within the past 100 million years or less. Why?
A. Large regions of the surface have very few impact craters. B. We see places where liquid water has been upwelling from as subsurface ocean. C. Smooth regions of the surface are made of nitrogen ice. D. The surface coloration can only be explained by active volcanism. E. Tall mountains are made of water ice.
A physical barrier to listening might include
a. thinking about what to have for lunch b. lack of focus c. being biased against the speaker d. loud music
Energy Levels: Determine the energy of the most energetic x-ray you can get from an electron transition in a heavy atom having 93 protons.
A. 118 keV B. 0.865 eV C. 164 MeV D. 5.19 × 107 eV
Albedo changes may result from ______________ pollution
Fill in the blank(s) with correct word