A ball rolls along a horizontal track with a dip in it. While in the dip its kinetic energy is

A. less.
B. more.
C. the same.
D. need more information


Answer: B

Environmental & Atmospheric Sciences

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a. there are no plants b. potential evaporation and transpiration exceed precipitation c. there is no precipitation d. precipitation exceeds potential evaporation and transpiration e. winters are short, but cold

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According to the second law of thermodynamics,

a. energy cannot be created or destroyed. b. things tend to move toward a more disorderly state. c. matter can be created, but not energy. d. kinetic energy is the most efficient source of energy.

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The Vostok ice core was collected to 3,100 feet below the surface, and has revealed ________ years of climate data.

A. 420,000 B. 500,000 C. 100,000 D. 42,000

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Why is the city of Phoenix, Arizona experiencing land subsidence?

A. overpumping of aquifers B. collapse of old mines C. earthquakes D. weight of newly filled reservoir

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