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A cylindrical wheel billet 1ft. in diameter and 3ft. long, initially at 1000 F, is quenched in oil. Assume that the surface of the billet is 200 F throughout the quenched; assume that the convective heat transfer coefficient between the oil and the billet surface is very large. The steal has the following properties, which may be assumed independent of temperature: K = 25 Btu/h-ft-F, Cp = 0.11 Btu/lbm-F, p = 490 lbm/ft^3, a(alfa) = 130*10^-6 ft^2/s. Estimate the temperature of the hottest point in the billet after five minutes of quenching. Neglect end effects; make the calculation for a cylinder of the given diameter but of infinite length.
Find the stress in both members shown below and what steel specifications (types of steel) are suitable for structural applications?
Estimate the torque required at the base of a flag pole to hold it in place in a 30mph wind. Assume the flag pole is a vertical cylinder with D=10cm and L=10m, and assume the wind drag force is uniform along the pole.
a preheater involves the use of condensing steam at 100c on the inside ofnbspa bank of tubes to heat air that enters at
an airplane flies horizontally at 55.0 ms. its propellernbspdelivers 1500 n of thrust forward force to overcome
Applied Loads, Young's modulus, Poisson's ratio, The Young's modulus and the Poisson's ratio for copper are 124.8 GPa and 0.36 respectively. When a tensile load is applie to a 1.5cm diameter copper rod
For the pendulum shown in the figure,the restoring torque due to gravity is given by T=mgLsin(thita). Derive the linearised equation about the operation point thita=0.
Find the differential equation governing the motion of the diver while she is in contact with the board. Neglect any rotational inertia and what is the peak de?ection of the diving board?
A body with a plane stress field has material properties E, ν and has the following displacement field
why is the carnot cycle not suitable as an ideal cycle for all the power producing devices ?
a venturi meter is inserted in a pipe whose diameter is 12 in. the diameter of the meter at its throat is 6 in. and the
Determine the angle between his velocity vector and the line from his position to the airlock's position.
a curved nozzle assembly that discharges to the atmosphere is shown. The nozzle mass is 4.5 kg and its internal volume is 0.002 m^3. The fluid is water. determine the reaction force exerted by the nozzle on the coupling to the inlet pipe.
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