Please explain the q Time
Time
Time
4.
The figure shows a system of two concentric spheres of radii r, and r2 and kept at
temperatures T I and T2 respectively. The radial rate of flow of heat in a substance
.2
between the two concentric spheres is proportional to
(l)
r,) 6.1 U
(4) log -Z
(3)
qr2
