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The diagram is for three materials with 3 different thermal conductivities, i think the material with higher thermal conductivity is the number 1 because it transfers the heat much better so it gets to the steady temperature sooner than the other two,am i correct? If not or if my reason isn't correct , i appreciate your helps.

enter image description here

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This must represent the average temperature, or the temperature at some specific location within the body (since the temperature will be a function of spatial location and time). Just ask yourself what the curve would look like if the thermal conductivity of the material were zero. This should give you your answer.

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  • $\begingroup$ If k=0 then there is no heat transfer ,so the temperature remains constant and it wont reach that avg temperature,right? So the material with highest conductivity reaches that temperature faster? $\endgroup$
    – Mo Samani
    Mar 13 '16 at 19:06
  • $\begingroup$ Sure. This is how you can "bound the answer" to address your question. $\endgroup$ Mar 13 '16 at 22:36

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