D 150 mm wide. Assume the plates are negligibly thin, and that the natural convection air flow adjacent to the plates is not affected by the presence of the neighboring plates. The temperatures of the surface of the plates and the air are 90C and 14C, respectively. Consider the following: i) Determine the natural convection heat transfer coefficient (W/m2 C) for each vertical surface. ii) Calculate the rate of heat transfer (W) from

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false