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A tubular aluminum bar (G = 28 GPa) of square cross section (see figure) with outside dimensions 50 mm x 50 mm must resist a torque T = 340 N ·m. Calculate the minimum required wall thickness t if the allowable shear stress is 31 MPa and the allowable angle of twist e per unit length is 0.033 rad/m.
The electric reheating oven is used to heat a continuous sheet of metal from 25-1000C The metal speed is such that the strip of metal spends 2 hours inside this oven, The sheet thickness is 1cm and the ambient temperature is 25C with the temperature ..
a mixture of gases with an apparent molecular weight of 35 kgkilo-mol is flowing at 20 degrees celsius the manometer
Define any private global variables you need.
the jib crane is supported by a pin a c and rod ab. the rod can withstand a maximum tension of 40kn. if the load has a
A heat pump with a coefficient of performance of 3.8 provides energy at an average rate of 75,000 kJ/h to maintain a building at 21oC on a day when the outside temperature is 0oC. If electricity costs 8 cents per kW. h. Determine the electric power r..
An object whose mass is 300 lb experience changes in its kinetic and potential energies owing to the action of a resultant force R. the work done on the object by the resultant force is 140 Btu. There are no other interactions between the object a..
Two harmonic waves travel simultaneously along a long wire. Calculate the range Δx between successive zeros of the group. Relate Δx to Δk. What is the phase velocity of the resultant wave
A 25-kg block of copper at at initial temperature of 150 C equilibrates with 0.79 kg of liquid water at an initial temperature of 20 C in an insulated tank. If the average specific heat of copper can be taken to be 0.395 kJ/kg.K, determine the final ..
consider a steam rankine cycle with superheat. the maximum temperature and pressure are 540 c and 60 bar and the
Rubber bands are used in physical therapy to provide resistance to motion. For a band that is 0.07 inches thick and 2.5 inches wide, with E = 120 psi and ν = 0.47. (a) If a force of 4 lbs is applied to an 18 inch long strip, what is the change in ..
The cross section of a beam constructed of a W 24 × 162 wide-flange section with an 8 in. × 3/4 in. cover plate welded to the top flange is shown in the figure. Determine the distance from the base of the beam to the centroid C of the cross-secti..
Determine the reactions that are created when the frame is connected to the support and the uniform load is applied to tnember Be praw the shear and moment diagrams and sketch the deflected shape.
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