Nuclear reactors use nuclear _____________ to generate energy whereas the Sun uses nuclear ____________ to generate energy
Fill in the blank(s) with correct word
fission, fusion
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The mass found by gravitational lensing in these colliding galaxy clusters is in a separate physical location from the hot gas that resulted from the collision.
II) Dark matter does not strongly interact with regular matter, other than through gravity. III) Hot intracluster gas makes up the majority of the mass of galactic clusters. A) Only I B) I and II C) I and III D) I, II, and III
The spacing of the atoms in the H2 molecule is 7.4 x 10-11 m. What is the moment of inertia of this molecule about its center of mass?
A) 1.5 x 10-47 kg? m2 B) 1.9 x 10-47 kg? m2 C) 9.1 x 10-48 kg? m2 D) 4.6 x 10-48 kg? m2 E) 2.3 x 10-48 kg?v
Atomic Nucleus: In a 
Nb nucleus, how many protons, neutrons, and electrons are found there?
A. 41, 52, 93 B. 41, 52, 41 C. 52, 41, 41 D. 41, 52, 0 E. 93, 41, 93
Stephen Hawking predicted that black holes can "evaporate" by emitting what we now call Hawking radiation. What does it mean for a black hole to "evaporate"?
A) The black hole loses its electric charge. B) The black hole's mass is gradually reduced. C) The black hole itself remains unchanged in mass, but it is able to send radiation out into the universe. D) Any matter that surrounds the black hole is heated to the point where it becomes a gas, if it wasn't already.