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The Sherwood number for vapor transport from the surface of a high moisture food product to the surrounding air is 2.78. Compute the convective mass transfer coefficient, when the dimension of the product in the direction of air movement is 15 cm, and the mass diffusivity for water vapor in air is 1.8×10-5 m2/s.
An engine block with a surface area measured to be 0.90m2 generates a power output of 55 kW with a net engine efficiency of 35%. The engine block operates inside a compartment at 157oC and the average convection heat transfer coefficient of 60 W/m..
The wheel of a crane lift is rolling on a flat rail. The radius of the wheel is 4 in, the contact length and force are 2.5 in and 1 ton respectively, and E = 30 MPa and ν = 0.3 for both parts. Determine (a) the maximum contact pressure, (b) the wi..
a tube with elastic modulus of 75 gpa is used to support a compressive load. it is required that this tube must not
Determine whether laminar-to-turbulent transition occurs in the boundary layer of the fuselage. If transition occurs, where does it occur - Estimate the skin friction drag on the aircraft's fuselage.
A connection of rod of 50 mm diameter has a rectangular block 50 mm wide and 25mm thick forged at its end. A turned radius of 25 mm joins the rod and the block. Draw the projections of the rod showing curves of intersection.
block c starts from rest at t 0 and moves downward with a constant accelerration of 4 ins2 . knowing that block b has
A. When the two torques are applied to the composite shaft, determine: the maximum shear stress magnitude in aluminium tube (1), the rotation angle of joint B and c.
the work on a system with a mass 100 lbm is known to be 10 btus. if there is no change in potential energy and the
20 kg of water at 200 kpa with a quality 25 is heated under a constant volume process until its pressure reaches 400
a polyethylene bar having diameter d14 inches is placed inside a steel tube having inner diameter d2 4.01 inches. the
determine the smallest allowable value of the coefficient of static friction between the collar and the rod if the collar is not to slide when a) a =15° b)a = 45°. Indicate for each case the direction of the impending motion.
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.
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