Find the mid-chord elevation.
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June 2021
m7NbLvW-0 Situation. Given the following for a parabolic curve: L = 300 m; g_1 = –3.2%; g_2 = +1.8%
Situation
Given the following for a parabolic curve:
Point of intersection, PI is at elevation 465.92 m.
How many stations are there in the curve?
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sIg3ZYd-0 Situation. It is required to layout a simple curve by deflection angles.
Situation
It is required to layout a simple curve by deflection angles. The curve is to connect two tangents with an intersection angle of 32° and radius of 240 m. The transit is setup at PC which is at Sta 5 + 767.2.
A line of levels 9.36 km is run to check the elevation of BM 2 which been found to be 31.388 meters with BM 1 of elevation at sea level. If the backsight and foresight distances are consistently 110 m and 70 m, respectively, determine the corrected elevation of BM 2 considering the effects of curvature and refraction of the earth.
Evaluate $(2 \, \text{cis } 20^\circ)^3$.
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