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.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.