4.A base line was measured by tape suspended in catenary under a pull of 145N, the mean temperature being 14°C. The lengths of various segments of the tape and the difference in level of the two ends of a segment are given in following Table. Difference inLength(m)Вay/Spanlevel (m)129.988+ 0.346229.895- 0.214329.838+ 0.309429.910- 0.106If the tape was standardized on the flat under a pull of 95 N at 18°C determine the correctlength of the line. TakeCross-sectional area of the tape3.35 mm?Mass of the tape0.025 kg/mCoefficient of linear expansion0.9 × 10° per °CYoung's modulus14.8 × 10* MN/m?Mean height of the line above M.S.L.51.76 mRadius of earth6370 km

The pull at the time of observation is P=145 N. The temperature at the time of observation is…

4.A base line was measured by tape suspended in catenary under a pull of 145N, the mean temperature being 14°C. The lengths of various segments of the tape and the difference in level of the two ends of a segment are given in following Table

4.A base line was measured by tape suspended in catenary under a pull of 145N, the mean temperature being 14°C. The lengths of various segments of the tape and the difference in level of the two ends of a segment are given in following Table

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

Length and Length related Variables

Length can de defined as the measurement or extent of physical quantities or objects from one terminal to another terminal. Stone age humans used finger length, step length, and so on to measure the size or displacement of an object. Nowadays, depending on how precise the measurement requires to be and the object’s size is measured, we use measuring devices for measurements like rulers and steel tape. Most people have used a ruler or tape measure to measure a particular distance or the size of an object. For more precise measurements of tiny objects, the development of measurement tools such as the Vernier caliper, which permits us to measure dimensions within 1/1000 of an inch. In the last few decades, electronic distance measuring instruments (EDMI) have been implemented that permit us to measure distances from a few feet to many miles with reasonable accuracy.

Question

Difference in
Length
(m)
Вay/Span
level (m)
1
29.988
+ 0.346
2
29.895
- 0.214
3
29.838
+ 0.309
4
29.910
- 0.106
If the tape was standardized on the flat under a pull of 95 N at 18°C determine the correct
length of the line. Take
Cross-sectional area of the tape
3.35 mm?
Mass of the tape
0.025 kg/m
Coefficient of linear expansion
0.9 × 10° per °C
Young's modulus
14.8 × 10* MN/m?
Mean height of the line above M.S.L.
51.76 m
Radius of earth
6370 km

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