posted by Anonymous .
Find the heat that flows in 1 s through a lead brick 18 cm long if the temperature difference between the ends of the brick is 6.8° C. The cross-sectional area of the brick is 14 cm2.
Look up the thermal conductivity of lead, k, and use the heat conduction equation.
Q = k*A*(dT/dX)*1 second
A = 14 cm^2
dT/dX is the temperature gradient, 0.378 degC/cm
k should be in units of calories or joules per (degC*cm)