Can anyone that knows geography well help me answer these questions.
any help will be appreciated thanks~


1) Explain why it is true that for every pair of points on the globe there is a unique great circle through them if the points are not antipodal. What happens if they are antipodal?

2)Recall Eratosthenes experiment set up to determine earth's circumference and assume this obelisk is 10ft tall. Whats the length of the shadow cast by it in Alexandra on June 21st, the day of the experiment.

3)whats the distance seperating the equator and lat.40degreee North along the prime meridian?

4) For each of the following latitudes, determine the distance between 0 deg and 15 deg East longititude:
a)30deg North Latitude. b)60deg North latitude.
c) The Tropic of Capricon

5) (TorF) Every pair of antipodal points of the surface of the earth must have exactly one great circle passing through it.

6) (TorF) Any pair of points on the surface of the earth lies on a unique great circle.

7) (TorF) The shortest distance between any two points on the spherical surface of the earth is the straight line distance between them.

8)Is it true that the angular distance between a persons horizon and the polaris measure the persons latitude? Prove the validity of your answer.

9) Consider an ellipse with semi-major and semi-minor axis respectively 5miles and 4.5 miles. Determine
a) the eccentricity of the ellipse.
b) the index of the oblateness of the ellipse.

 

I never thought Geography was anything more than "Point to Uzbekisan" on the map or something like that.....