A cube and a sphere (both solid) of same mass, same material are heated upto same temperature and then kept in same surrounding. Rate of cooling means rate of fall of temperature

Two spheres of same material and radius r and 2r are heated to same temperature and are kept in identical surroundings, ratio of their rate of loss of heat is

Two spheres of same material and radius r and 2r are heated to same temperature and are kept in identical surroundings, ratio of their rate of loss of heat is

A solid copper cube and sphere, both of same mass & emissivity are heated to same initial temperature and kept under identical conditions. What is the ratio of their initial rate of fall of temperature ?

Two metallic spheres S_(1) and S_(2) made of same material have identical surface finish. The mass of S_(1) is 3 times that of S_(2) . Both are heated to same temperature and are placed in same surroundings. Then ratio of their initial rates of fall of temperature will be

A sphere, a cube and a circular disc, made of same material and of same mass are heated to same temperature and placed in same surrounding. Which one will have fastest rate of cooling and which one will have slowest ?

A sphere, a cube and circular plate of same material and same mass are heated to same temperature. Then cooling of

A solid sphere and a hollow sphere of the same material and size are heated to the same temperature and allowed to cool in the same surroundings. If the temperature difference between the surroundings and each sphere is T, then :