Physics
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
Increase
Decrease
Remain unaffected
Have its shape changed
Increase
The metal ball can be considered to be made up of several layers of thinner ones. On heating each of these layers will increase in radius. As the inner most layer also increases its radius, the volume inside it i.e, the volume of the hollow portion will also increase.
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