_____ is the energy believed to fill empty spaces and drive the acceleration of the expanding Universe
A) Kinetic energy
B) Hot energy
C) Dark energy
D) Light energy
C
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What is the binding energy per nucleon of 197Au (atomic number = 79)? (The following information regarding atomic masses will be needed: 197Au, 196.966 543 u; hydrogen, 1.007 825 u; neutron, 1.008 665 u; also 1 u = 931.5 MeV/c2)
a. 931 MeV b. 745 MeV c. 7.92 MeV d. 1870 MeV
Which new process was added to the nebular theory of solar system formation to account for the existence of Jupiter-mass planets that orbit close to their stars (the "hot Jupiters")?
A) Planets can migrate from the orbits in which they are born. B) In addition to the categories of terrestrial and jovian, there must be an "in-between" category of planet that has the mass of a jovian planet but the composition of a terrestrial planet. C) In some star systems, it is possible for jovian planets to form in the inner solar system and terrestrial planets to form in the outer solar system. D) Giant impacts can affect planets after they form.
When a dishonest scientist reports false information, he or she
A) as in many other professions, will be excused by the scientific community. B) gets no second chance in the scientific community. C) is elevated in the scientific community.
Refer to the figure above. Suppose that an electron makes a transition from n = 3 to n = 2 and emits a photon of frequency 4 × 1014 Hz. Then an electron that makes a transition from n = 3 to n = 1 may emit a photon with a frequency of
1) 1 × 1014 Hz, 2) 3 × 1014 Hz, 3) 4 × 1014 Hz, 4) 9 × 1014 Hz, which is consistent with emission of the most energetic photon from a transition from n = 3 to 5) n = 1. 6) n = 2. 7) either, as both transitions are equivalent.