1.

Freezer is at -18 deg C. Will will be Radiative heat transfer if meat is at 298k, its emissivity is 0.82 and average area is 0.045m2.
Either use Stefan Boltzmann law or take hr (radiative heat transfer co-efficient) as 0.227.

A. n = ( T<sub>av</sub>/100 )<sup>3</sup>
B. 7.61
C. 6.94
D. 8.43
E. None of the mentioned
Answer» B. 7.61


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