Consider a rectangular-shaped gel tablet of thickness 0.652 cm and width 1.0 cm. The edges of the gel tablet are sealed. The initial concentration of the drug Dramamine (solute A) in the gel (B) is 64.0 mg/cm^3, to provide a total drug dosage of 41.7 mg. The diffusion coefficient of the drug in the gel is 3:0 × 10-7 cm^2/s. What is the residual concentration of drug at the center of the tablet after 96 h? The concentration of the drug at the exposed surface of the tablet is maintained at zero.

Acarnot refrigerator operates in a room in which the temperature is 21°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain