In the critical density universe now proposed, the ratio of dark energy to matter is about:
A) 1 to 100.
B) 1 to 1.
C) 3 to 1.
D) 10 to 1.
E) 1 to 5.
C
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Edge dislocations whose tangent and Burger’s vector are not on a most closely packed plane are _________.
Fill in the blank(s) with the appropriate word(s).
If the merger theory is correct, the brightest active galactic nuclei should:
A) be in the smallest elliptical galaxies. B) contain the youngest stars. C) contain the least mass. D) contain supermassive black holes. E) form small irregular galaxies.
If the newly discovered planet of Krypton has 100. times the mass of the Earth and 100. times the diameter of the Earth, what would be the period of a "low" orbiting satellite around Krypton?
A) 1.5 hours B) 1.5 × 103 hours C) 15. hours D) 1.5 × 102 hours E) 0.15 hours
A slit of width 2.0 ?m is used in a single slit experiment with light of wavelength 650 nm. If the intensity at the central maximum is Io, what is the intensity 10° from the center?
A) 0.53 Io B) 0.03 Io C) 0.43 Io D) 0.50 Io E) 0.35 Io