Which of the following statements is false?
a. The majority of surface rocks are igneous.
b. The study of rocks is called petrology.
c. Rocks are classified as igneous, sedimentary, or metamorphic.
d. Rocks are composed of one or more minerals.
a
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A river flows toward the East at 1.7 m/s. Steve can swim 2.0 m/s in still water. If he swims, relative to the water at a direction of 33 degrees west of north, how long will it take him to cross the 75 m wide river?
A. 45 s B. 39 s C. 123 s D. 27 s
Which of the following is not a vector quantity?
A) velocity B) speed C) acceleration D) all are vector quantities E) none are vector quantities.
The largest asteroid, and probably the only one to be a spherical "world," is
A) Ceres. B) Ida. C) Vesta. D) Gaspra. E) Eros.
__________ are emitted when high speed electrons decelerate as they are smashed into a metal target
Fill in the blank(s) with correct word