Most minerals can be identified by easily observable physical properties. In order of most useful to least useful, the identifiable physical properties are
A) color, crystal form, hardness, cleavage, and density.
B) hardness, cleavage, density, crystal form, and color.
C) crystal form, color, hardness, cleavage, and density.
D) crystal form, hardness, cleavage, color, and density.
Answer: B
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A particle is moving with a constant acceleration of 4.0 m/s2. Its speed at t = 1.0 s is 4.0 m/s and at t = 3.0 s it is 12.0 m/s. What is the area under the position-time graph for the interval from t = 1.0 s to t = 3.0 s?
A. 8.0 m/s B. 8.0 m C. 12 m D. 16 m E. 16 m/s2
Which recording formats employ magnetism?
a. videotape b. CD c. DVD d. floppy disk
What does it take to allow us to observe a neutron star as a pulsar?
What will be an ideal response?
The lunar highlands have more craters than the maria because ________.
A. the surface of the maria is liquid and craters quickly disappear there B. the maria are much older than the highlands C. the material composing the highlands is very soft and easily cratered D. the maria are much younger than the highlands