46 2:35 0.30 sE4G22KB/sPoint A is between points B and C.The distances of B and C from A are2000m and 3000m, respectively.Measured from point A, the angle ofelevation of point B is +18°30', whilethat on point C is +8°15'. Find thedifference in elevations between Band C.Your answerA backsight of 3.265m is taken on apoint 175 m from a level station and aforesight of 1.118m from the samestation. Determine the difference inelevation between the two points,taking into account the combinedeffect of curvature and refraction.Your answerTwo identical towers, A and B, arelocated on level ground and theirbases have equal elevations abovesea level. Determine the distance (infeet) between the two towers if aperson standing on top of tower Acan just see the top of tower B. Hiseyes on the level of top of tower A is50 ft above the ground.Your answerBy taking a sight across a lake 15miles wide through a pair ofbinoculars, determine the height (infeet) of the shortest tree on theopposite shore whose tip theobserver can see. Assume that theeyes of the observer are 5 feet and 6inches above the shore line which hestands.Your answer3II

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Point A is between points B and C. The distances of B and C from A are 2000m and 3000m, respectively. Measured from point A, the angle of elevation of point B is +18°30', while that on point C is +8°15'. Find the difference in elevations between B and C.

Point A is between points B and C. The distances of B and C from A are 2000m and 3000m, respectively. Measured from point A, the angle of elevation of point B is +18°30', while that on point C is +8°15'. Find the difference in elevations between B and C.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

State Plane Coordinate Systems

The state plane coordinate system (SPCS or SPS) is a collection of 124 coordinate systems or geographic zones prepared for particular regions of the U.S. Every state consists of one or more than one state plane zone, the boundaries of which generally follow the county lines. Inside the U.S., there are 110 zones in total, 10 more zones in Alaska, 5 in Hawaii, and 1 for Puerto Rico and US Virgin islands. The system is extensively used for geospatial and geographic data assembling by the state and local governments.

Question

46 2:35 0.30 sE
4G
22
KB/s
Point A is between points B and C.
The distances of B and C from A are
2000m and 3000m, respectively.
Measured from point A, the angle of
elevation of point B is +18°30', while
that on point C is +8°15'. Find the
difference in elevations between B
and C.
Your answer
A backsight of 3.265m is taken on a
point 175 m from a level station and a
foresight of 1.118m from the same
station. Determine the difference in
elevation between the two points,
taking into account the combined
effect of curvature and refraction.
Your answer
Two identical towers, A and B, are
located on level ground and their
bases have equal elevations above
sea level. Determine the distance (in
feet) between the two towers if a
person standing on top of tower A
can just see the top of tower B. His
eyes on the level of top of tower A is
50 ft above the ground.
Your answer
By taking a sight across a lake 15
miles wide through a pair of
binoculars, determine the height (in
feet) of the shortest tree on the
opposite shore whose tip the
observer can see. Assume that the
eyes of the observer are 5 feet and 6
inches above the shore line which he
stands.
Your answer
3
II

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Subject: engineering surveying
7-) A level of circuit is run a total distance of 9 km from BM30 to set three other benchmarks in the vicinity of a construction project. The given elevation of BM30 is 112.78 meters. When closing the level loop, its elevation is observed to be 112.68 m. What is the accuracy of the survey? Adjust the benchmark elevations. ONSO A Observed Elev:142.50m BM30 Elev. 112.78m 2.65 km 3.40 km BN30 B go0 m Observed Elev:99. 80 m 2.05 km BN30 C Observed Elev: 120.24m
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