Which of the following best describes how modern astronomers view astrology?
A) Astrology played an important part in the development of astronomy in ancient times, but it is not a science by modern standards.
B) Astrology is a synonym for astronomy.
C) Astrology was a great idea until it was disprove by the work of Copernicus, Tycho, Kepler, and Galileo.
D) Astrology is new age mumbo-jumbo that was a waste of time when it was invented thousands of years ago and remains a waste of time today.
A
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Four coins, each with a Head and a Tail, are tossed randomly on to a table. The microstate is defined as the "number of Heads showing". The number of Heads can be, 0, 1, 2, 3, 4. What value for the "number of Heads showing" has the greatest number of microstates?
A. 0 B. 1 C. 2 D. 3 E. 4
As the frequency of the ac voltage across a capacitor approaches zero, the capacitive reactance of that capacitor
A) approaches zero. B) approaches infinity. C) approaches unity. D) none of the given answers
Answer the following statement(s) true (T) or false (F)
1. A quanton moving in a system whose V (x) is given by the box potential energy function can never be unbound, no matter what its total energy might be. 2. An electron moving near a proton can never be unbound, no matter what its energy might be.
Spectra for the Cygnus loop and the Orion nebula are shown above. Judging from their spectra, how would these two objects look to the naked eye (assuming they were bright enough for colors to be distinguished)?
A) The Cygnus loop would appear red, and the Orion nebula would appear blue. B) The Cygnus loop would appear red, and the Orion nebula would appear red. C) The Cygnus loop would appear blue, and the Orion nebula would appear blue. D) The Cygnus loop would appear blue, and the Orion nebula would appear red.