A hollow spherical conducting shell of inner radius R 1 = 0.25 m and outer radius R 2 = 0.50 m is placed inside a heat reservoir of temperature T 0 = 1000 ºC. The shell is initially filled with water at 0ºC. The thermal conductivity of the material is k = 
W/m-K and its heat capacity is negligible. The time required to raise the temperature of water to 100ºC is 1100 K λ n 
sec. Find K. Take specific heat of water s = 4.2 kJ/kg.°C, density of water d w = 1000 kg/m 3 , π = 
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
(5)
For any general moment 1000ºC.
i H = 
= 
where R eq = 
= 
R eq = 
= 
Now, mass of water inside cavity
M = ρ × 
π R 1 3
= MS 
= 
(dθ = dT)
= 
t = R eq MS × 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems