What would Jupiter have needed to have become a star?
A) more moons
B) more mass
C) a slower rotation, like the Sun
D) a different chemical composition
E) a higher density
B
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Radio communication between distant places on Earth is possible because the
A) ionosphere reflects radio signals. B) ionosphere transmits radio signals. C) stratosphere reflects radio signals. D) exosphere reflects radio signals.
Whose work with SETI lead to the discovery of pulsars in 1967?
A) Jocelyn Bell B) Sir Bernard Lovell C) Anthony Hewish D) Martin Schwarzschild E) Stephen Hawking
How do we test our computer models for the interior of the Sun?
A) taking movies of the solar prominences and flares B) sending a probe to the Sun to plunge into its interior C) monitoring the helium content of the surface of the Sun D) comparing model predictions to how the Sun actually vibrates
When ImageRa decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?
A) atomic number = 86; atomic mass = 222 B) atomic number = 87; atomic mass = 226 C) atomic number = 86; atomic mass = 224 D) atomic number = 87; atomic mass = 224