Question
Question: A sphere, a cube and a thin circular plate all made of the same mass and finish are heated to a temp...
A sphere, a cube and a thin circular plate all made of the same mass and finish are heated to a temperature of 200ŗC; which of these objects will cool slowest when left in air at room temperature -
A
The sphere
B
The cube
C
The circular plate
D
All will cool at the same rate
Answer
The sphere
Explanation
Solution
Sphere is having minimum area so, dq/dt will also be minimum.