What maintains a forced wave?
a. wave height
b. wave period
c. restoring force
d. wavelength
e. disturbing force
e
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A heavy block is suspended at rest by a vertical rope. When you raise the block at a constant velocity, the rope tension
A. is zero. B. is greater than its weight. C. is less than its weight. D. equals its weight.
Why does groundwater discharge to Earth's surface?
A. Earth's surface is regular, and permeability decreases with depth within Earth. B. Earth's surface is irregular, and permeability increases with depth within Earth. C. Earth's surface is regular, and permeability increases with depth within Earth. D. Earth's surface is irregular, and permeability decreases with depth within Earth.
Greenwich mean time (GMT) is a system of
A. determining when daylight savings time should go into effect. B. coordinating the rules for what time should appear on a clock, around the world. C. determining what years should be considered leap years and which should not. D. identifying the phase of the lunar cycle.
What is the approximate length of the mid-ocean ridge system that extends around the globe through all of the major ocean basins?
A. 650 km B. 6500,000 km C. 6,500 km D. 650,000 km E. 65,000 km