On a planet where atmospheric gases are yellow, distant snow covered hills would look
A) bluish.
B) greenish.
C) yellowish.
D) reddish.
E) untinted.
Answer: A
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Double-lobed radio galaxies are____
a. spiral galaxies with unusually luminous nuclei b. elliptical galaxies with very broad emission lines c. explained by the double-exhaust model d. extremely luminous objects with high redshifts e. glowing green gases due to excitation from energy from an active core
In beta-minus decay, which neutrino is emitted?
A. the electron neutrino B. the electron antineutrino C. the muon neutrino D. the muon antineutrino E. the tau neutrino
What is the inductance of a series RL circuit in which R = 1.0 K? if the current increases to one-third of its final value in 30 ?s?
A. 74 mH B. 99 mH C. 49 mH D. 62 mH E. none of the above
A certain diatomic molecule emits a photon of energy 1.20 eV when it makes a transition from the n = 1 vibrational state to the next lower vibrational state
What is the frequency of vibration of the molecule? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 1.93 × 1014 Hz B) 2.73 × 1015 Hz C) 4.35 × 1014 Hz D) 2.90 × 1014 Hz E) 1.82 × 1015 Hz