If ?o is exactly one, then the geometry of the universe is ________
Fill in the blank(s) with correct word
flat or Euclidean
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A large solar furnace reflects solar radiation from a parabolic dish to a collector. The dish and collector are very long and have a configuration shown. Determine the shape factor, or view factor, from the dish to the collector.
For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________
Fill in the blank(s) with correct word
Star A is blue, Star B is yellow, and Star C is red. Which one of these is the hottest star?
A. star A B. star B C. star C D. From color, temperature cannot be predicted.
A 0.250 mole sample of an ideal gas has a volume of 0.00200 
a pressure of 2.00 atmospheres. What is the temperature of the sample of gas?
A. 153 K B. 166 K C. 175 K D. 185 K E. 195 K