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A steel rod, which is free to move has a length of 200mm anddiameter of 20mm at a temperature of 15oC. If the rod isheated uniformly to 115oC, determine the length andthe diameter of this rod to the nearest micron at the newtemperature if the coeffiecient of thermal expansion of steel is12.5 x 10-6m/m/oC. Is there a stress on therod at 115oC.
Also if the rod is snugly fitted against two immovablenonconducting walls at a temperature of 15oC and thenheated uniformly to at 115oC, what is its length at115oC? If the modulus of elasticity of steel is 207 GPa,what is the stress induced in the bar? Is this stress tension or compression?
Determine the major and minor principal stresses at failure and the effective stress friction angle (assume c' = 0). Plot the Mohr diagram.
A company produces two kinds of septic tanks: type A and type B. Each type B tank takes twice as long to produce as a type A tank. If it only produced type A tanks, the company has the time to produce a maximum of 2000 tanks per week.
Under these conditions flow is expected to be turbulent, but for a clean air, very smooth enterance (with guided vanes) to the tube and no tube vibration, it may be possible to maintain laminar flow.
A household uses 10 therms of natural gas per month in a gas furnace for heating at a cost of $1.00/therm. For an electric heating system the cost of electricity is $0.10/kwh. Compare the cost of the electric heater to deliver the same energy as t..
The elastic ball bounces down a flight of rigid stairs. Determine the height h of the steps if all the trajectories between successive steps are identical. Use e=0.85 and the initial velocity 6 m/s.neglect friction.(teta=70 degrees)
The student strikes the sign at a speed of 25 mi/h. if the student was travelling at 65 mi/h when the sign was first spotted, what was the student's associated perception reaction time
A steel tank with 2.5 m high vertical walls and a flat triangular floor is filled with three immiscible liquids layered upon each other. Two of the walls are 1.2 m long and perpendicular to each other.
The weight of the box is 20 lb and the coefficient of static friction between the box and the floor = 0.65. Neglect the weights of the bars. What is the largest value of the force F that will not cause the box to slip
Based on volume of a sphere V=4/3(pi)r^3, create a table of volume vs. radius allowing radius to vary from 2.0 to 10.0 cm in 1 cm increments. Graph the data from the table on log-log paper using radius as the independent variable.
the aeropress manual coffee and espresso maker is shown in figure 1. answer the following questions and clearly state
A baseball is hit from home plate and travels over the center field fence. What would the trajectory of the baseball look like if air-resistance was not factored in
Calculate the required average strength fc for the concrete ( a) if there are no prior test results for concrete with a compressive strength within 1000 psi of fc made with sim-ilar materials.
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