1. Because of the rotation of the earth, the surface at the equator
moves 463 meters per second. The speed of the earth’s surface
rotation is less at higher latitudes and is zero at the poles. The
radius of the earth is 6373 km. Determine the speed of the
earth’s rotation at latitudes 20 degree celciusand 70 degree celcius.
Hint: Consider how the circumference of the earth, and hence
the distance travelled, will change with latitude.