On a Hertzsprung-Russell diagram, where would we find stars that have the largest radii?
A) upper right
B) lower right
C) upper left
D) lower left
A
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Most of the deuterium formed right after the Big Bang
A) broke down into electrons and neutrons. B) was found in the globular clusters. C) turned into dark matter. D) is still around today. E) quickly burned into helium nuclei.
Three point charges are positioned on the x axis. If the charges and corresponding positions are +32 ?C at x = 0, +20 ?C at x = 40 cm, and ?60 ?C at x = 60 cm, what is the magnitude of the electrostatic force on the +32-?C charge?
a. 84 N b. 12 N c. 36 N d. 50 N e. 48 N
A car starting from rest travels a distance of 20.0 m with a constant acceleration of 2.0 
The car then slows to a stop in 10.0 seconds with a constant negative acceleration. The distance traveled by the car is
A. 36 m. B. 46 m. C. 50 m. D. 58 m. E. 65 m.
If Earth had no atmosphere, its temperature would be
A) somewhat warmer than the freezing temperature of water. B) somewhat below the freezing temperature of water. C) extremely hot, about 50 degrees Celsius. D) well below freezing, about -50 degrees Celsius. E) about the same temperature it is now.