An oil well contains water at the bottom, oil floating on it, and air above the oil. You performed two time-of-arrival measurements with an instrument that measures the depth of the well using a light beam. The first reading on the instrument is t₁ = 1.33 µs and the second one is t₁ = 1.29 us taken after a certain amount of oil was pumped out.

An oil well contains water at the bottom, oil floating on it, and air above the oil. You performed two time-of-arrival measurements with an instrument that measures the depth of the well using a light beam. The first reading on the instrument is t₁ = 1.33 µs and the second one is t₁ = 1.29 us taken after a certain amount of oil was pumped out.

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Coordinate Geometry of Survey

Coordinate geometry (COGO) is a method of inserting surveying or engineering data into geographic information system (GIS), computer-aided design (CAD), or mapping software. These data can be collected on the proposed construction site using standard surveying techniques and instrumentation or may be taken from existing maps, engineering plans, drawings, or records. Data gathered on the site includes coordinates of points, bearings, and distances between points. The data are noticed and noted through conventional surveying procedures, like a traverse or layout measurement series and it can be either digital or non-digital. The maps and plans are inclusive of boundaries, divisions, and other components, and these features are shown with coordinate values, the lengths, offset distance, and bearings between them.

Question

3. An oil well contains water at the bottom, oil floating on it, and air above the oil. You performed
two time-of-arrival measurements with an instrument that measures the depth of the well using
a light beam. The first reading on the instrument is t₁ = 1.33 us and the second one is
t₁ = 1.29 us taken after a certain amount of oil was pumped out.
Calculate the change in the oil level considering the oil refractive index is 1.46.

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