1. Two immovable concrete blocks are connected with a 2 inch by 2 inch square bar. At72°F there is no stress in the bar. If the bar heats from 72°F to 102°F, what is the stressin the bar? How much force do the blocks exert on the bar?

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Answered: Twó immovable concrete blocks are…

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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3. A 1.40 m long steel circular bar is acted upon by forces as shown in fig below. determine the total elongation of the bar. Take E steel=200Gpa and E brass = 85GN/m² 4 cm 3 ст 3 ст 40 kN 60 kN Steel 100 kN 80 kN Steel Brass 40 cm 60 cm 40 cm
The heels on a pair of women's shoes have a radius of 5 cm at the bottom. If 30% of the weight of a woman 480N is supported by each heel, find the stress on each heel
Mohr’s circle is shown for a point in a physical object that is subjected to plane stress. Each grid square is 16 MPa in size. (a) Determine the stresses σx, σy, and the magnitude of τxy and show them on a stress element. (b) Determine the stresses σn, σt, and the magnitude of τnt and show them on a stress element that is properly rotated with respect to the x-y element. The sketch must include the magnitude of the angle between the x and n axes and an indication of the rotation direction (i.e., either clockwise or counterclockwise).
A rigid horizontal bar ABC is supported by three vertical rods as shown. The system is stress free before the load is applied. After the load P is applied, the temperature of all three rods is raised by 110°F. Determine the magnitude of the normal stress in rod (1). Answer in MPa rounded-off to 2 decimal places. Rod (1) : E = 105 GPa; a= 22.0 x 10-5/°C A=500 mm² Rod (2): E = 200 GPa; a = 11.7 x 10-6/°C A=250 mm² 2,100 mm 4,400 mm (1) (2) B (2) P= 45 KN 2,100 mm I
At room temperature (20°C), a 0.5-mm gap exists between the ends of the rods shown. The temperature eventually reaches a value of 140°C. Determine the normal stress in the aluminum rod. Determine the change in length of the aluminum rod.
A spherical pressure vessel has a 1.33-ft inner radius and 0.19-in. wall thickness. If the working tensile stress of the material is 5594psi, determine the maximum allowable internal pressure (in psi). Add your answer
A cantilevered beam is loaded as shown. The cross section at the wall is shown, with points of interest A (at the top), B (at the center), and C (midway between A and B). 200 mm where F= 1.4 kN F B 50 mm 50 mm Cross section at wall NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
A roadway sign that weighs Py = 14 kN is supported by a structural pipe with an outside diameter of 340 mm and a wall thickness of 10.5 mm. Wind pressure on the sign creates a resultant force of P₂ = 21 kN, acting as shown. Using length dimensions of a = 5.4 m and b = 6.3 m, determine (a) the normal and shear stresses at point H. (b) the normal and shear stresses at point K. P₂ Py b H y K
A wire with a Young’s Modulus, E, of 8.5 x 106 N/m2 and an original length of 1.5 m is under tension. If the wire length extension is 2.5 mm, calculate the stress in the wire. Give your answer in N/m2to 2 decimal places. (show all work)
Consider a circular plate that has a uniform pressure along the top surface and a fixed support on the edge around the perimeter, as shown. What would be the most efficient model to use to analyze the stress in the plate? O 3D model O Shell model O Plane stress model O Axisymmetric model TTTTT 7777
2. A thin-walled sphere with a diameter of 30 cm and a wall thickness of 3 mm is filled with liquid at a pressure of 3 MPa. Calculate the stress in the sphere wall.
A pipe has an outside diameter of 0.7 inches and inside diameter of 0.12 inches. A force of 144 lbs is applied at the end of a 1.1 ft lever arm, causing the pipe to twist. What is the maximum stress in the pipe in psi?

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Twó immovable concrete blocks are connected with a 2 inch by 2 inch square bar. At 72°F there is no stress in the bar. If the bar heats from 72°F to 102°F, what is the stress in the bar? How much force do the blocks exert on the bar?