Time changes by one hour for each 15° degree change in longitude; this is because
A) it was determined by how fast 17th century ships could travel.
B) 15° insures that major population centers have unique time zones.
C) early navigation instruments did not allow better accuracy than 15 degrees.
D) 15° was chosen arbitrarily.
E) twenty-four latitude lines were chosen so that 24 hours represents a 360° revolution around
the planet.
Answer: E
You might also like to view...
What is one disadvantage of using plasma gasification to detoxify hazardous waste?
A. mobility B. toxic ash production C. cost D. groundwater contamination E. low energy use
Which of the following are adherents to the two main branches of Islam?
A) Bahá'ís and Sikhism B) Sunnis and Shi'ites C) Muslims and Mohammedans D) Arabs and Ahmediyans E) Caliphs and Sufis
Cumulonimbus:
A) can span nearly the entire troposphere. B) are prevented by the tropopause from entering the stratosphere. C) are typically composed of ice near the bottoms of the clouds. D) provide smooth flying for commercial airliners.
The St. Francis Dam in California failed because
A. some of the rocks of the valley walls disintegrated when wet. B. the reservoir was overfilled. C. there was movement on the fault over which the dam was built. D. the dam itself was poorly built and collapsed.