1.When conducting a leveling loop, why is it important to have equal distances from the instrument for the backsight and foresight readings?
2.A 96-in diameter cast iron pipe carries water at 60f. the head loss due friction is 1.5ft per 1000ft of pipe. what is the dischage capacity of the pipe
3.Given the magnetic bearing in 1999= S86degree 36' 14''E with declination 11degree 18'W and 7'East/year. Find astronomic bearing and magnetic for 2011.