Questions
A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature then
detailed solution
Correct option is B
Rate of cooling of a body R = ∆θt = A∈σ(T4-T04)mc⇒ R directly proportional to Am is directly proportional to AreaVolume⇒For the same surface area. R directly proportional to 1VolumeVolume of cube < Volume of sphere⇒ RCube> Rsphere i.e., cube, cools down with faster rateTalk to our academic expert!
Similar Questions
For a black body at temperature 727°C, its radiating power is 60W and temperature of surrounding is 227° C. If temperature of black body is changed to 1227°C, then its
radiating power will be :
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