A tube is loaded in torsion. OD is 1.500 inches, wall thickness is.050 inches, t

Question

A tube is loaded in torsion. OD is 1.500 inches, wall thickness is.050 inches, torque is 1000 pound-inches, material is steel. Determine the shear stress caused by the torsion. Use Mohr's circle to determine the tensile and compressive stresses at 45 degrees. Use your visualization skills and sketches as necessary to determine which active gage directions have tensile stress and which have compressive stress. Determine the strain on each of the four gages. (A and B on front side of the tube, C and D on the back side of the tube.) Assuming the gages are 350 ohm, 2.10 gage factor, wired as shown, determine the output voltage from the bridge.

Explanation / Answer

NH3(g) + HCl(g) = NH4Cl (s)

Initial amount= 68g /17 gmol-1 36.5g /36.5gmol-1

4 mol 1mol -

since NH3(g) and HCl(g) react in the ratio of 1:1, so all   NH3(g)    is not reacted due to lack of HCl(g)

amount reacted 1 mol 1mol -

amount formed - - 1mol

amount left 3 mol - -

In here pressure is created only by remaining   NH3(g) . because   NH4Cl(s) is a solid.

By using ideal gas law the pressure can be calculated.

PV = nRT

P = nRT/V ( P= Pressure, V = Volume, R = Universal Gas Constant, n = amount of mol, T= Temperature)

P = (3mol * 0.08206 latm-1K-1*273 K) / 2 l (l=liters)

P = 33.6 atm

the answer is (e)   

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