Uniform Circular Motion: An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors.
A. Both vectors point in the same direction.
B. The vectors point in opposite directions.
C. The vectors are perpendicular to each other.
D. The acceleration is zero but the velocity is constant.
Answer: C
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Vectors A , B, C and have magnitudes 6, 11, and 22. When these vectors are added, what is the least possible magnitude of their addition?
A. 25 B. 15 C. 5 D. 3
Which of these does NOT exist?
A) a million solar mass black hole B) a 6 solar mass black hole C) a 6.8 solar mass neutron star D) a 1.0 solar mass white dwarf E) a 0.06 solar mass brown dwarf
Ohm's Law: For the graph shown in the figure, what physical quantity does the slope of the graph represent for ohmic material?
A. power B. resistivity C. 1/(resistivity) D. resistance E. 1/(resistance)
The upper right corner of the Hertzsprung-Russell diagram has:
A. all the white dwarfs B. the coolest and least luminous stars C. the hottest and most luminous stars D. the coolest and most luminous stars E. the hottest and least luminous stars