Here's how it works:
* Materials expand when heated: Iron, the primary material of the Eiffel Tower, expands when its temperature rises.
* Summer heat: During the summer, the sun heats the tower's structure, causing the iron to expand slightly.
* Winter cold: In winter, the lower temperatures cause the iron to contract.
The difference between the expanded summer height and the contracted winter height is around 6-12 cm, not 7.5 cm. This is a very small change considering the tower's overall height of 330 meters.
It's important to remember that the tower's design accounts for this expansion and contraction. The engineers built in the necessary flexibility to accommodate the temperature changes, ensuring the tower's structural integrity.