Question

Four identical copper cylinders are painted; if they are all heated to the
same temperature and left invacuum which one will cool most rapidly?​

Answer 1

Answer:

Black colour gives maximum absorptivity and emissivity, which we want.

Black colour gives maximum absorptivity and emissivity, which we want.Shiny finish gives maximum reflectivity, which we don't want.

Black colour gives maximum absorptivity and emissivity, which we want.Shiny finish gives maximum reflectivity, which we don't want. Hence, the answer is painted Rough Black.

Explanation:

Hope it helps

mark me brainliest