According to the philosophy of Democritus,
A) the color red is not "real" but is instead just humans' "conjecture" or imagination.
B) atoms are not "real" but are instead just humans' "conjecture" or imagination.
C) Both of the above.
D) Neither of the above.
E) the moon is really a giant frog.
A
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The outflow channels on Mars indicate a flood period in the history of Mars. During this time, based on the width and depth of the remaining riverbed, it is thought that the flow rate must have been:
A) just a small trickle, barely more than a stream of water. B) moderate, about the flow rate of the Ohio River. C) fairly large, about the flow rate of the current Colorado River. D) significantly large, about the flow rate of the Amazon River. E) enormous, as much as 100 times the flow rate of the Amazon River.
The wavelength of a periodic wave is 0.750 m. If the frequency is 425 Hz, then what is the angular frequency, 
of the wave?
A. 
B. 
C. 
D. 
E. 
An adiabatic expansion refers to the fact that:
a. no heat is transferred between a system and its surroundings. b. the pressure remains constant. c. the temperature remains constant. d. the volume remains constant.
Is there any place on Earth where we can see stars rise in the west and set in the east (rather than rising in the east and setting in the west)? Why or why not?
A) yes, in the Southern Hemisphere, because the sky appears backward there B) yes, on Earth's equator, because it is halfway between the poles C) no, because the rising and setting of stars is caused by Earth's west to east rotation D) no, because the stars that rise in the west and set in the east are too dim to be seen by the naked eye