A main difference between electric forces and gravitational forces is that gravitational forces
A. repel or attract.
B. act over shorter distances.
C. obey the inverse-square law.
D. only attract.
Answer: D
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Dynamic forcing of upper air currents will create
A) upper air convergence at A that results in surface high pressure.
B) upper air divergence at A that results in surface high pressure.
C) upper air convergence at B that results in surface low pressure.
D) upper air convergence at B that results in surface high pressure.
Wildlife in the Serengeti is currently threatened by ________
A) an invasive fish that has been introduced into the major river that flows through the park B) an overabundance of elephants C) pollution from a nearby coal power plant D) plans to build a highway that passes through the park E) plans to legalize hunting of most of the large animal species in the park
If a tectonic shift raised Mount Everest 10,000 feet, what would Earth’s new relief be?
A. 29,883 feet B. 75,233 feet C. 39,035 feet D. 65,233 feet E. 36,198 feet
After forty to sixty years of service, every nuclear plant will have to be ___________, or retired, and taken apart.
Fill in the blank(s) with the appropriate word(s).