What precision should you expect for a quantity that you determine by estimation in which variables used in the calculation are rounded to the nearest power of ten?
A)
Two significant figures will always be correct.
B)
the correct order of magnitude
C)
Anywhere from two to three significant figures will always be correct.
D)
One significant figure will always be correct.
E)
Three significant figures will always be correct.
B
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Which of the following is true of spring tides?
A) They occur at noon and midnight every day. B) They occur at first- and third-quarter moons. C) They occur at dawn and dusk every day. D) They occur at new moon and full moon.
Which component of Earth's geology has helped to shield the Earth's atmosphere from energetic particles of solar wind from the Sun which would have gradually stripped it away into space?
A) volcanism B) seismic activity C) plate tectonics D) global magnetism
Suppose the date is March 21 and the Sun crosses your meridian at an altitude of 23-1/2° in the north. Where are you?
A) the equator B) the Tropic of Cancer (latitude 23-1/2°N) C) the Tropic of Capricorn (latitude 23-1/2°S) D) the Arctic Circle (latitude 66-1/2°N) E) the Antarctic Circle (latitude 66-1/2°S)
The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the magnitude of the field between the plates during this process?
A) It increases. B) It decreases. C) It remains constant. D) It cannot be determined from the information given.