A sphere, a cube and a thin circular plate, all made of same substance and all have same mass. These are heated to 200 
and then placed in a room, then the
Text Solution
Verified by ExpertsThe correct answer is:
A
∴ ∴ Rate of cooling 
[As masses are equal then volume of each body must be equal because materiel is same]
i.e. rate of cooling depends on the area of cross-section and we know that for a given volume the area of cross-section will be minimum for sphere. It means the rate of cooling will be minimum in case of sphere.
So the temperature of sphere drops to room temperature at last.
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
A rod of 40 cm in length and temperature difference of at its two ends. Another rod B of length 60…
In a steady state of thermal conduction, temperature of the ends A and B of a 20 cm long rod are a…
Four rods of silver, copper, brass and wood are of same shape. They are heated together after wrapp…
The two opposite faces of a cubical piece of iron (thermal conductivity = 0.2 CGS units) are at an…
Wein's constant is MKS unit and the value of from moon is 14.46 microns. What is the surface temp…
If at temperature the wavelength is then at what temperature the wavelength will be