Cosmology: Dark energy accounts for what percent of the known energy in the universe?
A) 8%
B) 24%
C) 68%
D) 94%
Correct Answer:
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Q16: Particles: What type of particle is an
Q17: Quarks: Which of the following particles is
Q18: Conservation laws: Consider the possibility that a
Q19: Conservation laws: Consider the decay πo →
Q20: Particles: Particles that do not interact via
Q22: Cosmology: Dark energy was discovered as astronomers
Q23: Conservation laws: Is the decay π0 →
Q24: Cosmology: Luminous (normal) matter makes up approximately
Q25: Particle accelerators: A deuteron has the same
Q26: Particles: A neutral η0 (having mass 0.642
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