Which of these force fields can increase a moving electron's speed?
A. Electric field.
B. Magnetic field.
C. both of these
D. none of the above
Answer: A
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Radium in groundwater
A. makes the water unsafe for bathing. B. occurs only near leaking radioactive-waste dumps. C. can be removed by water softeners. D. All of the choices are correct.
Who reaps the most economic benefits associated with the Green Revolution?
A) dictatorships B) farmers in mid-latitude countries (Australia, France, Germany, for example) C) international shipping companies D) large-scale wealthy farmers in the developing world E) small-scale farmers (of any wealth) in the developed world
The physical process by which water alone removes pieces of rock from a stream channel is called _____
a. corrosion b. Abrasion c. attrition d. hydraulic action e. saltation
The rapid melting of Greenland's ice cap could disrupt the North Atlantic Deep Water (NADW) formation by ________
A) adding excess nutrients to cold northern waters B) adding huge amounts of less dense fresh water to the surface of the North Atlantic C) adding huge amounts of dense fresh water to the deep ocean in the North Atlantic D) acidifying ocean waters of the North Atlantic E) adding heat and salt to deep ocean waters in the North Atlantic