Which is an example of an asterism?
a. Andromeda
b. Canis Major
c. Ursa Major
d. Big Dipper
e. Pegasus
d
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Energy and Mass: The total energy of a moving electron is 0.758 MeV. What is the speed of the electron in terms of c? The mass energy of an electron is 0.511 MeV.
A. 0.739 c B. 0.794 c C. 0.306 c D. 0.933 c
When dark matter is added, what happens to the speeds of the inner and outer stars?
A.) All the speeds increased the same. B.) The stars near the center slowed down, but the outer ones were accelerated. C.) All the stars sped up, but the outer ones gained the most speed. D.) All were slowed down by the tidal drag of the dark matter. E.) There was no change.
What are the three main sources of internal heat for terrestrial planets?
A) conduction, differentiation, and accretion B) accretion, differentiation, and radioactivity C) accretion, differentiation, and eruption D) convection, differentiation, and eruption E) conduction, convection, and eruption
Two identical silver spheres of mass m and radius r are placed a distance R (sphere 1) and 2R (sphere 2) from the Sun, respectively. The ratio of the gravitational force exerted by the Sun on sphere 1 to the pressure of solar radiation on sphere 1 is T1; the ratio for sphere 2 is T2. The ratio of T2 to T1 is
A. 0.25. B. 0.50. C. 1.0. D. 2.0. E. 4.0.