When we speak of the large-scale structure of the universe, we mean
A) the overall arrangement of galaxies, clusters of galaxies, and superclusters in the universe.
B) the structure of any large galaxy.
C) the structure of any individual cluster of galaxies.
D) the overall shape of the observable universe.
A) the overall arrangement of galaxies, clusters of galaxies, and superclusters in the universe.
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Which two things are the same for all observers according to the theory of relativity?
A) (1) the laws of nature and (2) the speed of light B) (1) the laws of nature and (2) the rate at which time proceeds C) (1) the speed of light and (2) the simultaneity of events D) (1) the rate at which time proceeds and (2) the simultaneity of events E) (1) the size of moving objects and (2) the mass of moving objects
Room temperature is about 20 degrees on the:
A. Kelvin scale B. Celsius scale C. Fahrenheit scale D. absolute scale E. C major scale
The water hole lies between 18 and 21 cm in wavelength in the radio spectrum
Indicate whether the statement is true or false
The full moon by definition occurs
a. for only a day. b. for 7-3/8 days. c. only for an instant. d. only once every month.