The amount of thermal energy that flows in one minute through a copper brick, $k = 395$ W/(m.K), that has cross-sectional area = 20 cm $2$ length = 10 cm, and temperature difference across the ends of 15ºC is

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Quizplus · Accepted Answer

The thermal energy flow can be calculated using the formula $ Q = \frac{k \cdot A \cdot \Delta T \cdot t}{L} $. Converting units and substituting the given values: $ k = 395 $ W/(m.K), $ A = 0.002 $ m², $ \Delta T = 15 $ K, $ t = 60 $ s, $ L = 0.1 $ m, we get $ Q = \frac{395 \times 0.002 \times 15 \times 60}{0.1} = 7,110 $ J or 7.1 kJ.

The Amount of Thermal Energy That Flows in One Minute k=395k = 395k=395

The Amount of Thermal Energy That Flows in One Minute $k = 395$