The fundamental nuclear reaction occurring in the core of the Sun is
A) nuclear fission.
B) radioactive decay.
C) nuclear fusion of hydrogen into helium.
D) nuclear fusion of helium to carbon.
C
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For a star of Sun-like mass, what is the last stage of the nuclear fusion?
a. Hydrogen to helium. b. Helium to carbon and oxygen. c. Carbon to magnesium. d. Fusion goes all the way up to iron.
These two skaters have just pushed off against one another. One skater has twice the mass as the other. Which one will experience the greater velocity?
A. The heavier skater
B. The lighter skater
C. Neither, they both have the same
The motion of a particle connected to a spring is described by x = 10 sin (pt). At what time (in s) is the potential energy equal to the kinetic energy?
a. 0 b. 0.25 c. 0.50 d. 0.79 e. 1.0
Which of the following is not a metamorphic rock?
a. Sandstone b. Schist c. Slate d. Marble