Asked by A Bailey
40 degrees north runs along 146th street on the north side of Indianapolis. What is the rotational velocity of the surface of the earth at 40 degrees north?
Answers
Answered by
Scott
the Earth completes one revolution in 24 hr
so, how long is the 40th parallel?
the "rotational" radius is equal to the radius of the Earth times cos(40º)
the length of the parallel (circumference) is 2π times the radius
divide the circumference by 24 hr to get the rotational velocity
so, how long is the 40th parallel?
the "rotational" radius is equal to the radius of the Earth times cos(40º)
the length of the parallel (circumference) is 2π times the radius
divide the circumference by 24 hr to get the rotational velocity
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