Two iron spheres of the same diameter are heated to the same temperature. One is soled, and the other is hollow which will expand more?

Explanation

To determine which of the two iron spheres (solid and hollow) will expand more when heated to the same temperature, we can analyze the problem step by step.

### Step 1: Understand the Concept of Thermal Expansion
Thermal expansion refers to the increase in size (volume) of a material when it is heated. The change in volume (ΔV) of a material due to temperature change (ΔT) can be expressed using the formula:
\[ \Delta V = \gamma V_0 \Delta T \]
where:
- \( \Delta V \) = change in volume
- \( \gamma \) = coefficient of volume expansion (depends on the material)
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