An atom that has 20 protons and 20 neutrons in its nucleus has this atomic number
A. 40.
B. 20.
C. 400.
D. Cannot determine because not enough information is given.
Answer: B
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Which of the following defines a katabatic wind?
A. a warm, downslope wind B. a cold, downslope wind C. a cold, upslope wind D. a warm, upslope wind
How is the earth's rotation axis oriented relative to the revolution orbit?
A) It varies somewhat randomly over small angles, less than 23.5 degrees. B) It is fixed and always points toward the North Star regardless of season. C) It changes with time so that it is perpendicular in June and December. D) We don't really know how much it varies because we have not been able to make observations from space for more than about 60 years.
The study of plate boundaries and the frequency of past earthquakes in order to forecast earthquakes is known as
A) paleontology. B) paleoseismology. C) dilatancy. D) geodesy. E) moment magnitude.
A large person and a small person wish to parachute at equal terminal velocities. The larger person will have to
A) get a larger parachute. B) jump lightly. C) pull upward on the supporting strands to decrease the downward net force. D) jump first from the plane. E) none of the above