Atomato can be idealized as a cnhere lealized as a sphere with internal heat generation that is due to ripening. consider a tomato with a diameter of 80 mm, density of 840 kg/m? , thermal conductivity of 0.5 w/(mk), uniform internal heat generation of 4000 j/(kg*day), and a film coefficient of 7.5 w/(m²k). if the tomato is wrapped in 5 mm of urethane foam, k=0.026 w/(mk), estimate the steady state temperature at the center of the sphere with a surrounding air temperature of 2°c.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.