The absolute magnitude of a star is its brightness as seen from a distance of
A) one million kilometers.
B) one astronomical unit.
C) one light-year.
D) ten parsecs.
E) 10 light-years.
D
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Within the multidimensional integrative approach to understanding psychopathology, learned helplessness is considered a(n) _______ dimension.
Fill in the blank(s) with the appropriate word(s).
For hydrogen, the transition from the second to the fourth energy level produces:
A) a red emission line. B) a blue green absorption line. C) a violet emission line. D) an infrared emission line. E) an ultraviolet absorption line.
Center of Mass: The center of mass (or center of gravity) of a two-particle system is at the origin. One particle is located at (3.0 m, 0.0 m) and has a mass of 2.0 kg. The other particle has a mass of 3.0 kg. What is the location of the 3.0-kg particle?
A. (-3.0 m, 0.0 m) B. (-2.0 m, 0.0 m) C. (2.0 m, 0.0 m) D. (3.0 m, 0.0 m)
A photograph of the two-dimensional elastic collision of two particles shows a particle of mass m1 approaching a stationary particle of mass m2
As a result of their interaction, the incident particle moves away along a line that makes an angle of 30° with its original path, and the other particle moves away along a line that makes an angle of 30° to the other side of the original path of the incident particle. What is the ratio of the masses, m1/m2? A) 0.5 B) 1 C) 2 D) 3 E) 4