If the radius of the earth is 4000 mi,
(a) How far is Fort Worth, Texas (latitude 33 N), from the equator?
(b) How far is Fort Worth from the North Pole?
(c) Fort Worth is due south of Winnipeg, Manitoba (latitude 50 N). What is the distance between them?
(d) Find the linear speed, due to the rotation of the earth, of Winnipeg.