Question 2(a) :A steel surveyor's tape is to be used to measure the length of a line. The tape has a rectangularsection of 2 cm by 0.5 cm and a length of 100 cm when T, and the tension or pullon the tape is AA N. Determine the true length of the line if the tape shows the reading to beBB cm when used v Formula Bar N atT,The ground on which it is placed is flat.Take:T =63°CPP93°CT,АА -20N2 стBB =463.28стСС -35N0.5 ст12(10*)/°C-6Et200 GPaSolution :8, =Ξα ΔΤL=cmPL8 =AEPage 1стL =463.28+cmAnsQuestion 2(b) :Three bars each made of different materials are connected together and placed between twowalls when the temperature is T . Determine the force exerted on the rigid supports whenthe temperature becomesbar are given in the figure.T,. The material properties and cross-sectional area of eachSteelBrassСорperEst = 200 GPaast = 12(10¬)/°C _@br = 21(10¬6)/°C acu =Epr = 100 GPaTake :Ecu = 120 GPa17(10-6)/°CT =12°CAcu = 515 mm²21°C|Ast = 200 mm² Abr = 450 mm²T,303A =ттA mm200 mmSolution :(+-)0=8, -8,0 =100 mm9 (12)(10“)A+9 (21)(10 )(0.2)+ 9 (17)(10“)(0.1)...AF0.2F0.1F200(10- 200(10°) 450(10^ho0(10°) 515(10^)120(10")F =

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on 2(a) : surveyor's tape is to be used to measure the length of a line. The of 2 cm by 0.5 cm and a length of 100 cm when T, and the te tape is AA N. Determine the true length of the line if the tape sho when used v Formula BarN at T,The ground on which it 63 °C P • 93 °C 20 2 cm 463.28 ст C = 35 0.5 cm N 12(10“)/°C = 200 GPa on : α ΔΤ L = cm PL 8 : AE Page 1 cm L = 463.28 + on 2(b) :

on 2(a) : surveyor's tape is to be used to measure the length of a line. The of 2 cm by 0.5 cm and a length of 100 cm when T, and the te tape is AA N. Determine the true length of the line if the tape sho when used v Formula BarN at T,The ground on which it 63 °C P • 93 °C 20 2 cm 463.28 ст C = 35 0.5 cm N 12(10“)/°C = 200 GPa on : α ΔΤ L = cm PL 8 : AE Page 1 cm L = 463.28 + on 2(b) :

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

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