Two metals s1and s2 are made of same material and have identical surface
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Problem (IIT JEE 1998): A solid body X of heat capacity
C
C is kept in an atmosphere whose temperature is
T
A
=
300
K
TA=300K. At time
t
=
0
t=0, the temperature of X is
T
0
=
400
K
T0=400K. It cools according to Newton's law of cooling. At time
t
1
t1 its temperature is found to be 350 K. At this time
(
t
1
)
(t1) the body X is connected to a large body Y at atmospheric temperature
T
A
TA through a conducting rod of length
L
L, cross-sectional area
A
A and thermal conductivity
K
K. The heat capacity of Y is so large that any variation in its temperature may be neglected. The cross-sectional area
A
A of the connecting rod is small compared to the surface area of X. Find the temperature of X at time
t
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