# physics

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A slab of a thermal insulator with a cross-sectional area of 115 cm2 is 4.00 cm thick. It is made out of red brick with thermal conductivity 0.600 J/s∙m•C°. The temperature difference between opposite faces is 95.0 C°. Calculate the following:
(a) The heat current through the slab
(b) The amount of heat flowing through the slab in two days
(c) The temperature gradient through the slab (unit: C°/cm)

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