Metamorphic rock that is weathered and broken down into small pieces can become
A) igneous rock.
B) recrystallized.
C) sediments which can then become sedimentary rock.
D) fossilized.
Answer: C
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When you look through a sheer curtain at a distant street lamp, you see a pattern of colored spots of light. This occurs by
A. polarization of light in scattering and partial absorption by the threads. B. interference of light waves that pass through the threads with light waves that pass through the openings between the threads. C. refraction of light waves differentially in the cylindrical threads. D. diffraction of light waves passing through the two dimensional pattern of openings between the threads. E. reflection of light waves by the sides of the threads.
A string of linear density 1.5 g/m is under a tension of 20 N. What should be its length if its fundamental resonance frequency is 220 Hz?
A) 0.26 m B) 0.96 m C) 1.1 m D) 1.2 m
If the magnetic field in an EM wave is in the x-direction and the electric field in the wave is in the y-direction, the wave is traveling in the
A) x-y plane. B) direction halfway between the x- and y-directions. C) z-direction. D) x-direction. E) negative z-direction.
Today, an average lunar moonquake releases about as much energy as
A) an atomic bomb. B) a firecracker. C) a major U.S. city uses in 1 year. D) the Mount St. Helens eruption. E) the most powerful earthquake ever recorded.