Question

Brightly polished kettles do not lose much heat energy.Why?

Answer 1

Answer:

Shiny and polished surfaces are poor emitters of radiations. Hence they reduce heat loss where as rough and dull surfaces are good emitters of radiations

Answer 2

brightly polished kettles do not lose much heat energy why?

The outer surface of an electric kettle is always kept polished and shiny to

A) gain energy by conduction

B) reflect any radiation incident on its outer surface

C) reduce energy loss by thermal conduction

D) reduce energy loss through radiation