A blind cylindrical hole of 2 cm diameter and 3 cm length is drilled into a meta

Question

A blind cylindrical hole of 2 cm diameter and 3 cm length is drilled into a metal slab having emissivity 0.7. If the metal slab is maintained at 650 K, make calculations for the radiation heat escape from the hole

Options:

A . 7 W

B . 3 W

C . 1 W

D . 9 W

Answer: Option B
Answer: (b).3 W

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