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(Solved): 4-79 White potatoes and \alpha =0.13\times 10^(-6)(m^(2))/(s) ) that are initially at a uniform te ...



4-79 White potatoes and

\alpha =0.13\times

10^(-6)(m^(2))/(s)

) that are initially at a uniform temperature of

25\deg C

and have an average diameter of 6 cm are to be cooled by refrigerated air at

2\deg C

flowing at a velocity of

4(m)/(s)

. The average heat transfer coefficient between the potatoes and the air is experimentally determined to be

19(W)/(m^(2))*K

. Determine how long it will take for the center temperature of the potatoes to drop to

6\deg C

. Also, determine if any part of the potatoes will experience chilling injury during this process.



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