What would happen to the velocity of a river if an avalanche dumped rocky debris on its stream bed?
A. The velocity would not change.
B. The velocity would increase to erode around and through the rocks.
C. The velocity would decrease because the channel roughness had increased.
D. The velocity might increase or decrease, depending on the size of the individual rocks involved.
Answer: C
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An electron vibrating at 1000 times per second generates an electromagnetic wave with a
A. period of 1000 s. B. speed of 1000 m/s. C. frequency of 1000 Hz. D. wavelength of 1000 m.
A comet's tails always point away from the Sun because
A. the inner planets cause the ice and other volatile materials to be pulled toward their orbits. B. of the comet's interaction with dark matter. C. of radiation pressure. D. when they move away from the Sun they begin to lose inertia.
Use the Venn diagram shown below to answer this question.
Which section of the diagram represents large-grained rocks?
A. Volcanic B. Both volcanic and plutonic C. Plutonic
If the distance from one wave crest to the next is 10 ft., what will the depth to the wave base be?
A) 2 ft. B) 5 ft. C) 11 ft. D) 20 ft.