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Consider Problem 8.47. A more realistic solution would account for the resistance to heat transfer due to free convection in the paraffin during melting. Assuming the tube surface to have a uniform temperature of 55°C and the paraffin to be an infinite, quiescent liquid, determine the convection coefficient associated with the outer surface. Using this result and recognizing that the tube surface temperature is not known, determine the water outlet temperature, the total heat transfer rate, and the time required to completely liquefy the paraffin, for the prescribed conditions. Thermophysical properties associated with the liquid state of the paraffin are
a small steel cylinder is used as a pressure vessel for a paint gun. the label says 24 grams co2 filled. assume the
Force and Torque on a Dam. A dam has the shape of a rectangular solid. The side facing the lake has area A and height H. The surface of the freshwater lake behind the dam is at the top of the dam.
Find the longitudinal and transverse components of the magnetic field intensity.
how much energy kj is needed to accelerate an 1800 kg vehicle from 10 kmh to 30 kmh? assume that the acceleration takes
calculate the number of schottky defects per cubic meter for sodium chloride at 700 c. assume an energy for defect
Using integration, determine the product of inertia Ixy for the quarter-circular spandrel shown in Case 12, Appendix D.
Consider a system consisting of liquid water initially at T1 = 318 K, p1 = 3.5 bar undergoing a process to a final state at T2 = 353 K, p2 = 1.5 bar. Use appropriate equation with the data from the table to evaluate change in specific entropy.
3.33 kg of water fills a weighted piston cylinder device, at a temperature of 400 deg. C, The piston cylinder device now is cooled until is temperature is 170 deg C. Determine final pressure and volume of the water
What is maximum shear stress in mechanics of materials? Derivation for maximum and minimum shear stress seperately.
Determine maximum total bending moment (static plus dynamic) of the beam under steady-state conditions.
a reversible carnot heat engine has 1.00 lbm of air as the working fluid. heat is received at 740 degrees f and
Determine the coefficients for the balanced chemical reaction at stoichiometric conditions for both petrol and E10 with air.
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