The largest asteroid, and probably the only one to be a spherical "world," is:
A) Eros.
B) Ida.
C) Vesta.
D) Ceres.
E) Gaspra.
D
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Which is an example of an asterism?
a. Andromeda b. Canis Major c. Ursa Major d. Big Dipper e. Pegasus
One of the most important features that must be explained by models during the formation of the galaxy is the ____
a. formation of spiral arms b. differences in age and metallicity of stars, especially in the halo c. formation of the central supermassive black hole d. accumulation of dark matter in the corona e. importance of spiral arms to star formation
The graph below shows a plot of angular acceleration in rad/s2 versus time from t = 0 s to t = 8 s. The change in angular velocity, ??, during this 8-second period is
A.
, CW.B.
, CCW.C.
, CW.D.
, CCW.E.
, CW.Imagine placing two long wires parallel to each other. If conventional currents flow through them in the directions shown, will the wires attract each other, repel each other, or exert no net force on each other?
A. Attract each other
B. Repel each other
C. Exert no net force on each other