If the total translational kinetic energy of the molecules of oxygen in a container is 15 J at room temperature, what is the total rotational kinetic energy of these molecules?
a. 5 J
b. 10 J
c. 20 J
d. 25 J
e. 0 J
b
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What is the Trapezium?
A. Four massive stars at the heart of the Orion Nebula B. Three massive stars on the outskirts of the Orion Nebula C. A few hot stars whose ultraviolet light is affecting the formation of other stars D. Both A and C E. Both B and C
A vertical wire carries a current straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this current?
A) down B) north C) south D) east E) west
Compared to a cold molecular cloud at 10 K, an HII region has a temperature about
A. 1,000 times hotter. B. 10 times hotter. C. 1,000,000 times hotter. D. the same.
A neutral atom has an electron configuration of 1s22s22p63s23p2. How many protons does it have in its nucleus?
A) 5 B) 11 C) 14 D) 20 E) 26