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Question Number 137317 by physicstutes last updated on 01/Apr/21

Commented by physicstutes last updated on 01/Apr/21

$$\mathrm{The}\mathrm{figure}\mathrm{above}\mathrm{shows}\mathrm{a}\mathrm{composite}\mathrm{bar}$$$$\mathrm{made}\mathrm{of}\mathrm{two}\mathrm{materials}X\mathrm{and}Y.\mathrm{The}\mathrm{end}$$$$\mathrm{of}X\mathrm{is}\mathrm{maintained}\mathrm{at}100°\mathrm{C}\mathrm{and}\mathrm{it}\mathrm{has}$$$$\mathrm{length}\mathrm{of}25\mathrm{cm}\mathrm{while}\mathrm{that}\mathrm{of}Y\mathrm{is}\mathrm{maintained}$$$$\mathrm{at}0°\mathrm{C}\mathrm{with}\mathrm{lenght}75\mathrm{cm}.\mathrm{Find}\mathrm{the}$$$$\mathrm{ratio}\mathrm{of}\mathrm{the}\mathrm{thermal}\mathrm{conductivities}$$$$\mathrm{of}Y\mathrm{and}X.$$

Commented by mr W last updated on 01/Apr/21

$$i{don}^{\prime }tthinkwecandeterminethis$$$$withoutknowingthetemperatureat$$$$thecontactpointofbothmaterials.$$

Commented by physicstutes last updated on 01/Apr/21

$$\mathrm{thank}\mathrm{you}\mathrm{sir},\mathrm{that}\mathrm{has}\mathrm{been}\mathrm{my}\mathrm{worry}$$

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