At what angle is the Sun above the horizon if its light is found to be completely polarized when it is reflected from the top surface of a slab of glass (n = 1.48)?
a. 34.0°
b. 56.0°
c. 0.594°
d. 42.5°
e. 47.5°
a
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Molecular Vibration: A diatomic molecule is vibrating in the v = 1 quantum state with a frequency of 2.0 × 1013 Hz. What is its vibrational energy? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 0.041 eV B. 0.083 eV C. 0.12 eV D. 0.17 eV
Current evidence suggests the universe will continue to expand forever, but some people would prefer if we lived in a recollapsing universe that would eventually stop expanding and start contracting. Based on current understanding, which of the following would have to be true for our universe to fit a recollapsing model?
A) Dark energy does not exist and there is much more matter than current evidence suggests. B) Dark energy is the dominant form of energy in the cosmos. C) The density of dark matter turns out to be greater than the density of dark energy. D) The total density of matter equals the critical density.
A current-carrying loop of wire experiences no tendency to rotate in a magnetic field when
A) field lines pass directly through the loop. B) no field lines pass through the loop. C) none of these
Saturn's larger satellites have lower average density than the Galilean satellites of Jupiter; therefore, we can conclude that Saturn's satellites contain less rock and more ice than the Galilean satellites.
Answer the following statement true (T) or false (F)