A cup of coffee is enclosed on all sides in an insulated container 1/2 cm thick in the shape of a cube 10 cm on a side.The temperature of the coffee is 95$\degree$C,and the temperature of the surroundings is 21$\degree$C.Find the rate of heat loss (in J/s)due to conduction if the thermal conductivity of the cup is 2 *10 ^- ⁴ cal/s.cm.$\degree$C. A)62 B)74 C)230 D)160 E)12

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The Answer of A cup of coffee is enclosed on all sides in an insulated container 1/2 cm thick in the shape of a cube 10 cm on a side.The temperature of the coffee is 95$\degree$C,and the temperature of the surroundings is 21$\degree$C.Find the rate of heat loss (in J/s)due to conduction if the thermal conductivity of the cup is 2 *10 ^- ⁴ cal/s.cm.$\degree$C. A)62 B)74 C)230 D)160 E)12

A Cup of Coffee Is Enclosed on All Sides in an Insulated