The one theory of the early universe before the Recombination Epoch and after the Planck Epoch that was developed to resolve a conflict between observation and theory is
A) the Grand Unified Theory.
B) the theory of inflation.
C) the theory of nucleosynthesis.
D) the theory of recombination.
E) the quantum quark theory.
B
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The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H.
When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. A. B. B. C. C. D. D. E. E.
Conversion of Units: There are 2.00 dry pints to 1.00 dry quart, 8.00 dry quarts to 1.00 peck, 4.00 pecks to 1.00 bushel. An organic farmer wants to pick enough berries to fill 40,000 pint containers. How many bushels of berries does the farmer need?
Fill in the blank(s) with the appropriate word(s).
Total Internal Reflection: Light travels from crown glass, with a refractive index of 1.52, into water, having a refractive index of 1.33? The critical angle for this interface is closest to which one of the following angles?
A. 42° B. 48° C. 53° D. 57° E. 61°
Careful measurements reveal that a star maintains a steady apparent brightness at most times, except that at precise intervals of 73 hours the star becomes significantly dimmer for about 2 hours. The most likely explanation is that
A) the star is a member of an eclipsing binary star system. B) the star is a Cepheid variable. C) the star is periodically ejecting gas into space, every 73 hours. D) the star is a white dwarf.