A solid cube and a solid sphere of identical material and equal masses are heated to the same temperature and left to cool in the same surroundings. Then:
The cube will cool faster because of its sharp edges.
The cube will cool faster because it has a larger surface area.
The sphere will cool faster because it is smooth.
The sphere will cool faster because it has a larger surface area.
A
The cube will cool faster because it has a larger surface area.
B
The sphere will cool faster because it has a larger surface area.
C
The sphere will cool faster because it is smooth.
D
The cube will cool faster because of its sharp edges.
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Solution
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For the same mass the a sphere has the least volume and surface area. Radiation is directly affected by surface area. Since the cube will have larger surface area, it will cool faster.
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