Fourier's Law
Q= -k Area *dTemp/dx
change area to m^2, and dtemp/dx= 9K/.17m
Look up k for Lead.
Hi maybe someone can help me out, since my teacher isn't available today and this is due tonight :D.
Find the heat that flows in 1.0 s through a lead brick 17 cm long if the temperature difference between the ends of the brick is 9.5 C. The cross-sectional area of the brick is 18 cm^2 .
2 answers
You need to look up the thermal conductivity of lead, k. According to Wikipedia, it is
35.3 W·m−1·K−1. If you want to use centimeter units, it is 0.353 W·cm^-1·K^-1
The heat flow rate is
dQ/dt = k·A·(deltaT)/L
A = 18^cm^2
L = 17 cm
delta T = 9.5K
Do the calculation
35.3 W·m−1·K−1. If you want to use centimeter units, it is 0.353 W·cm^-1·K^-1
The heat flow rate is
dQ/dt = k·A·(deltaT)/L
A = 18^cm^2
L = 17 cm
delta T = 9.5K
Do the calculation
1 answer