The carbon-nitrogen-oxygen (CNO) cycle works best in temperatures:
A) lower than 10,000,000 K.
B) higher than 16,000,000 K.
C) higher than 11,000,000 K but lower than 12,000,000 K
D) higher than 13,000,000 K but lower than 15,000,000 K
B
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The Milky Way Galaxy is
a. a spiral galaxy. b. part of a cluster of galaxies that contains a few dozen galaxies. c. about 80,000 light years in diameter. d. all of the above.
A 2.0-kg object moving 5.0 m/s collides with and sticks to an 8.0-kg object initially at rest. Determine the kinetic energy lost by the system as a result of this collision.
A. 20 J B. 15 J C. 30 J D. 25 J E. 5.0 J
The value of a wavelength in the Balmer series is 372.1 nm. What is the value of n?
A) 6 B) 3 C) 9 D) 10 E) 14
A farmer is applying compressed nitrogen to a field from a tank originally at 800 kPa. The temperature of the nitrogen as it leaves the tank is approximately:
(A) ?140°C (B) ?120°C (C) ?100°C (D) ?80°C