Question

Draw a labelled diagram to show transfer of heat by convection, when water teken in a flask is heated​

Answer 1

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when liquids and gases are heated the molecules become warm and less dense they expand and rise the molecules from the colder portions of substance flow downwards to take place of the warm molecules they in turn rise when they get warm this continues process is called convection.

heat loss due to conduction is prevented because glass is poor conductor of heat conduction cannot take place in vacuum because it needs medium the stopper and the vacuum prevents heat loss due to Convection the highly polished Silver wall prevent heat loss due to radiation

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Answer 2

Explanation:

it is correct best happy