<P> Heat is the amount of energy flowing from one body of matter to another spontaneously due to their temperature difference , or by any means other than through work or the transfer of matter . The transfer can be by contact between the source and the destination body , as in conduction ; or by radiation between remote bodies ; or by way of an intermediate fluid body , as in convective circulation ; or by a combination of these . In thermodynamics , heat is often contrasted with work : heat applies to individual particles ( such as atoms or molecules ) , work applies to objects ( or a system as a whole ) . Heat involves stochastic ( or random ) motion equally distributed among all degrees of freedom , while work is directional , confined to one or more specific degrees of freedom . </P>
<P> Heat is the amount of energy flowing from one body of matter to another spontaneously due to their temperature difference , or by any means other than through work or the transfer of matter . The transfer can be by contact between the source and the destination body , as in conduction ; or by radiation between remote bodies ; or by way of an intermediate fluid body , as in convective circulation ; or by a combination of these . In thermodynamics , heat is often contrasted with work : heat applies to individual particles ( such as atoms or molecules ) , work applies to objects ( or a system as a whole ) . Heat involves stochastic ( or random ) motion equally distributed among all degrees of freedom , while work is directional , confined to one or more specific degrees of freedom . </P>
which method represents the transfer of heat in a fluid
which method represents the transfer of heat in a fluid
convective circulation
convective circulation